./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 791161d1 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/openbsd_cmemchr-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 007fc8a389a67fb47c7d326d3f1d284696dfe5de13661e77d6d1bf7cce285194 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 05:39:13,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 05:39:13,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 05:39:13,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 05:39:13,301 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 05:39:13,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 05:39:13,304 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 05:39:13,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 05:39:13,307 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 05:39:13,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 05:39:13,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 05:39:13,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 05:39:13,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 05:39:13,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 05:39:13,319 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 05:39:13,321 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 05:39:13,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 05:39:13,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 05:39:13,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 05:39:13,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 05:39:13,331 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 05:39:13,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 05:39:13,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 05:39:13,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 05:39:13,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 05:39:13,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 05:39:13,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 05:39:13,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 05:39:13,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 05:39:13,346 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 05:39:13,346 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 05:39:13,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 05:39:13,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 05:39:13,348 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 05:39:13,349 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 05:39:13,349 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 05:39:13,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 05:39:13,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 05:39:13,350 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 05:39:13,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 05:39:13,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 05:39:13,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 05:39:13,356 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-23 05:39:13,374 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 05:39:13,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 05:39:13,375 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 05:39:13,375 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 05:39:13,375 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 05:39:13,376 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 05:39:13,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 05:39:13,376 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 05:39:13,377 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 05:39:13,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 05:39:13,377 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 05:39:13,377 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 05:39:13,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 05:39:13,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 05:39:13,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 05:39:13,378 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 05:39:13,378 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 05:39:13,378 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 05:39:13,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 05:39:13,379 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 05:39:13,379 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 05:39:13,379 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 05:39:13,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 05:39:13,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 05:39:13,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 05:39:13,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:39:13,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 05:39:13,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 05:39:13,380 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 05:39:13,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 05:39:13,381 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 007fc8a389a67fb47c7d326d3f1d284696dfe5de13661e77d6d1bf7cce285194 [2022-07-23 05:39:13,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 05:39:13,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 05:39:13,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 05:39:13,676 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 05:39:13,677 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 05:39:13,678 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i [2022-07-23 05:39:13,729 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ddaa1004/477c8e53ad37464cb68a038b42dd7974/FLAGecca3b9f8 [2022-07-23 05:39:14,275 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 05:39:14,276 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i [2022-07-23 05:39:14,292 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ddaa1004/477c8e53ad37464cb68a038b42dd7974/FLAGecca3b9f8 [2022-07-23 05:39:14,598 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ddaa1004/477c8e53ad37464cb68a038b42dd7974 [2022-07-23 05:39:14,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 05:39:14,603 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 05:39:14,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 05:39:14,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 05:39:14,609 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 05:39:14,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:39:14" (1/1) ... [2022-07-23 05:39:14,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c7f15ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:39:14, skipping insertion in model container [2022-07-23 05:39:14,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:39:14" (1/1) ... [2022-07-23 05:39:14,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 05:39:14,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 05:39:14,885 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:39:14,894 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 05:39:14,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:39:14,956 INFO L208 MainTranslator]: Completed translation [2022-07-23 05:39:14,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:39:14 WrapperNode [2022-07-23 05:39:14,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 05:39:14,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 05:39:14,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 05:39:14,958 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 05:39:14,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:39:14" (1/1) ... [2022-07-23 05:39:14,980 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:39:14" (1/1) ... [2022-07-23 05:39:15,004 INFO L137 Inliner]: procedures = 117, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-07-23 05:39:15,005 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 05:39:15,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 05:39:15,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 05:39:15,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 05:39:15,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:39:14" (1/1) ... [2022-07-23 05:39:15,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:39:14" (1/1) ... [2022-07-23 05:39:15,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:39:14" (1/1) ... [2022-07-23 05:39:15,014 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:39:14" (1/1) ... [2022-07-23 05:39:15,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:39:14" (1/1) ... [2022-07-23 05:39:15,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:39:14" (1/1) ... [2022-07-23 05:39:15,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:39:14" (1/1) ... [2022-07-23 05:39:15,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 05:39:15,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 05:39:15,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 05:39:15,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 05:39:15,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:39:14" (1/1) ... [2022-07-23 05:39:15,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:39:15,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:39:15,064 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) [2022-07-23 05:39:15,091 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 [2022-07-23 05:39:15,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-23 05:39:15,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-23 05:39:15,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-23 05:39:15,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 05:39:15,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 05:39:15,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 05:39:15,185 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 05:39:15,193 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 05:39:15,365 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 05:39:15,371 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 05:39:15,373 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-23 05:39:15,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:39:15 BoogieIcfgContainer [2022-07-23 05:39:15,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 05:39:15,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 05:39:15,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 05:39:15,384 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 05:39:15,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 05:39:14" (1/3) ... [2022-07-23 05:39:15,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fb6d1d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:39:15, skipping insertion in model container [2022-07-23 05:39:15,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:39:14" (2/3) ... [2022-07-23 05:39:15,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fb6d1d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:39:15, skipping insertion in model container [2022-07-23 05:39:15,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:39:15" (3/3) ... [2022-07-23 05:39:15,387 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cmemchr-alloca-2.i [2022-07-23 05:39:15,398 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 05:39:15,398 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2022-07-23 05:39:15,439 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 05:39:15,446 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@7b857efd, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@68802e76 [2022-07-23 05:39:15,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-23 05:39:15,451 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.65) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:15,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:39:15,472 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:15,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:15,473 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:15,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:15,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-07-23 05:39:15,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:15,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181280659] [2022-07-23 05:39:15,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:15,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:15,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:15,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181280659] [2022-07-23 05:39:15,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181280659] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:39:15,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:39:15,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:39:15,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058285855] [2022-07-23 05:39:15,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:39:15,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:39:15,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:15,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:39:15,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:39:15,813 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.65) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 2.3333333333333335) 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) [2022-07-23 05:39:15,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:15,896 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-07-23 05:39:15,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:39:15,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 [2022-07-23 05:39:15,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:15,905 INFO L225 Difference]: With dead ends: 46 [2022-07-23 05:39:15,905 INFO L226 Difference]: Without dead ends: 42 [2022-07-23 05:39:15,907 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 [2022-07-23 05:39:15,912 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 59 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:15,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 44 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:39:15,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-23 05:39:15,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 23. [2022-07-23 05:39:15,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:15,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-07-23 05:39:15,941 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 7 [2022-07-23 05:39:15,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:15,942 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-07-23 05:39:15,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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) [2022-07-23 05:39:15,942 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-07-23 05:39:15,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:39:15,943 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:15,943 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:15,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-23 05:39:15,945 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:15,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:15,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2022-07-23 05:39:15,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:15,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055689344] [2022-07-23 05:39:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:15,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:16,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:16,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:16,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055689344] [2022-07-23 05:39:16,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055689344] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:39:16,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:39:16,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:39:16,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573833644] [2022-07-23 05:39:16,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:39:16,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:39:16,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:16,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:39:16,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:39:16,033 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) 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) [2022-07-23 05:39:16,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:16,063 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-07-23 05:39:16,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:39:16,064 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 [2022-07-23 05:39:16,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:16,064 INFO L225 Difference]: With dead ends: 27 [2022-07-23 05:39:16,064 INFO L226 Difference]: Without dead ends: 27 [2022-07-23 05:39:16,065 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 [2022-07-23 05:39:16,066 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:16,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 43 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:39:16,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-23 05:39:16,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-07-23 05:39:16,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 24 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) [2022-07-23 05:39:16,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-07-23 05:39:16,070 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 7 [2022-07-23 05:39:16,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:16,071 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-07-23 05:39:16,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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) [2022-07-23 05:39:16,071 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-07-23 05:39:16,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 05:39:16,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:16,072 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:16,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-23 05:39:16,073 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:16,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:16,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1906083540, now seen corresponding path program 1 times [2022-07-23 05:39:16,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:16,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963758195] [2022-07-23 05:39:16,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:16,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:16,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:16,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963758195] [2022-07-23 05:39:16,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963758195] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:39:16,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805150212] [2022-07-23 05:39:16,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:16,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:16,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:39:16,161 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) [2022-07-23 05:39:16,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-23 05:39:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:16,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 05:39:16,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:39:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:16,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:39:16,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805150212] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:39:16,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:39:16,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-07-23 05:39:16,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654747386] [2022-07-23 05:39:16,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:39:16,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:39:16,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:16,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:39:16,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:39:16,320 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:16,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:16,347 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2022-07-23 05:39:16,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:39:16,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-23 05:39:16,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:16,348 INFO L225 Difference]: With dead ends: 44 [2022-07-23 05:39:16,349 INFO L226 Difference]: Without dead ends: 44 [2022-07-23 05:39:16,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:39:16,350 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:16,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 62 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:39:16,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-23 05:39:16,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2022-07-23 05:39:16,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:16,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-07-23 05:39:16,372 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 11 [2022-07-23 05:39:16,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:16,373 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-07-23 05:39:16,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:16,373 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-07-23 05:39:16,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 05:39:16,374 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:16,375 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:16,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-23 05:39:16,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:16,595 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:16,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:16,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1579537130, now seen corresponding path program 1 times [2022-07-23 05:39:16,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:16,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804475446] [2022-07-23 05:39:16,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:16,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:16,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:16,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:16,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804475446] [2022-07-23 05:39:16,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804475446] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:39:16,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963873141] [2022-07-23 05:39:16,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:16,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:16,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:39:16,668 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) [2022-07-23 05:39:16,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-23 05:39:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:16,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 05:39:16,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:39:16,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 05:39:16,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:16,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:39:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:17,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963873141] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:39:17,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:39:17,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-23 05:39:17,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255372653] [2022-07-23 05:39:17,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:39:17,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:39:17,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:17,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:39:17,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:39:17,052 INFO L87 Difference]: Start difference. First operand 31 states and 36 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) [2022-07-23 05:39:17,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:17,113 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2022-07-23 05:39:17,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:39:17,114 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 [2022-07-23 05:39:17,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:17,115 INFO L225 Difference]: With dead ends: 32 [2022-07-23 05:39:17,115 INFO L226 Difference]: Without dead ends: 32 [2022-07-23 05:39:17,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:39:17,116 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:17,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 74 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:39:17,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-23 05:39:17,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2022-07-23 05:39:17,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:17,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-07-23 05:39:17,121 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 11 [2022-07-23 05:39:17,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:17,122 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-07-23 05:39:17,122 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) [2022-07-23 05:39:17,122 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-07-23 05:39:17,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 05:39:17,123 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:17,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:17,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-23 05:39:17,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-23 05:39:17,340 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:17,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:17,340 INFO L85 PathProgramCache]: Analyzing trace with hash -373722351, now seen corresponding path program 1 times [2022-07-23 05:39:17,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:17,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335262059] [2022-07-23 05:39:17,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:17,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:17,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:17,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:17,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335262059] [2022-07-23 05:39:17,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335262059] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:39:17,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:39:17,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:39:17,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085453668] [2022-07-23 05:39:17,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:39:17,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:39:17,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:17,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:39:17,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:39:17,423 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:17,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:17,473 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-07-23 05:39:17,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:39:17,474 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-23 05:39:17,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:17,474 INFO L225 Difference]: With dead ends: 30 [2022-07-23 05:39:17,474 INFO L226 Difference]: Without dead ends: 30 [2022-07-23 05:39:17,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:39:17,475 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:17,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 55 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:39:17,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-23 05:39:17,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-07-23 05:39:17,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:17,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-07-23 05:39:17,479 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 14 [2022-07-23 05:39:17,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:17,479 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-07-23 05:39:17,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:17,479 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-07-23 05:39:17,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 05:39:17,479 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:17,480 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:17,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-23 05:39:17,480 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:17,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:17,480 INFO L85 PathProgramCache]: Analyzing trace with hash -373722350, now seen corresponding path program 1 times [2022-07-23 05:39:17,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:17,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454859759] [2022-07-23 05:39:17,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:17,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:17,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:17,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454859759] [2022-07-23 05:39:17,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454859759] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:39:17,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477651745] [2022-07-23 05:39:17,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:17,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:17,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:39:17,618 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) [2022-07-23 05:39:17,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-23 05:39:17,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:17,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-23 05:39:17,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:39:17,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:17,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:39:17,806 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 21 treesize of output 17 [2022-07-23 05:39:17,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:17,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477651745] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:39:17,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:39:17,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-07-23 05:39:17,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289370212] [2022-07-23 05:39:17,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:39:17,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-23 05:39:17,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:17,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-23 05:39:17,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-07-23 05:39:17,830 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:18,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:18,024 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-07-23 05:39:18,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:39:18,025 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-23 05:39:18,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:18,026 INFO L225 Difference]: With dead ends: 34 [2022-07-23 05:39:18,026 INFO L226 Difference]: Without dead ends: 34 [2022-07-23 05:39:18,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-07-23 05:39:18,027 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:18,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 99 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:39:18,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-23 05:39:18,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2022-07-23 05:39:18,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:18,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-07-23 05:39:18,030 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 14 [2022-07-23 05:39:18,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:18,030 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-07-23 05:39:18,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:18,031 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-07-23 05:39:18,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-23 05:39:18,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:18,031 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:18,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-23 05:39:18,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:18,244 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:18,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:18,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1300245881, now seen corresponding path program 1 times [2022-07-23 05:39:18,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:18,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453683930] [2022-07-23 05:39:18,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:18,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:39:18,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:18,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453683930] [2022-07-23 05:39:18,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453683930] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:39:18,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:39:18,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:39:18,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248331883] [2022-07-23 05:39:18,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:39:18,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:39:18,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:18,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:39:18,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:39:18,327 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:18,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:18,359 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2022-07-23 05:39:18,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:39:18,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-23 05:39:18,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:18,362 INFO L225 Difference]: With dead ends: 49 [2022-07-23 05:39:18,363 INFO L226 Difference]: Without dead ends: 49 [2022-07-23 05:39:18,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:39:18,364 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:18,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 68 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:39:18,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-23 05:39:18,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2022-07-23 05:39:18,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:18,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-07-23 05:39:18,371 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 15 [2022-07-23 05:39:18,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:18,372 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-07-23 05:39:18,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:18,373 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-07-23 05:39:18,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-23 05:39:18,374 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:18,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:18,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-23 05:39:18,375 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:18,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:18,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1558411319, now seen corresponding path program 1 times [2022-07-23 05:39:18,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:18,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785812965] [2022-07-23 05:39:18,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:18,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:18,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:39:18,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:18,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785812965] [2022-07-23 05:39:18,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785812965] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:39:18,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:39:18,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:39:18,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32125027] [2022-07-23 05:39:18,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:39:18,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:39:18,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:18,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:39:18,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:39:18,455 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:18,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:18,476 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-07-23 05:39:18,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:39:18,476 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-23 05:39:18,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:18,477 INFO L225 Difference]: With dead ends: 37 [2022-07-23 05:39:18,477 INFO L226 Difference]: Without dead ends: 37 [2022-07-23 05:39:18,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:39:18,478 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:18,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 37 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:39:18,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-23 05:39:18,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-07-23 05:39:18,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:18,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-07-23 05:39:18,489 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 15 [2022-07-23 05:39:18,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:18,489 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-07-23 05:39:18,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:18,490 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-07-23 05:39:18,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 05:39:18,490 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:18,490 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:18,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-23 05:39:18,491 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:18,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:18,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1007310944, now seen corresponding path program 1 times [2022-07-23 05:39:18,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:18,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213188205] [2022-07-23 05:39:18,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:18,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:18,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:39:18,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:18,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213188205] [2022-07-23 05:39:18,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213188205] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:39:18,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:39:18,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:39:18,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046795848] [2022-07-23 05:39:18,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:39:18,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:39:18,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:18,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:39:18,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:39:18,564 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:18,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:18,573 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-07-23 05:39:18,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:39:18,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-23 05:39:18,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:18,574 INFO L225 Difference]: With dead ends: 29 [2022-07-23 05:39:18,574 INFO L226 Difference]: Without dead ends: 26 [2022-07-23 05:39:18,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:39:18,575 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:18,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:39:18,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-23 05:39:18,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-23 05:39:18,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:18,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-07-23 05:39:18,578 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2022-07-23 05:39:18,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:18,578 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-07-23 05:39:18,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:18,579 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-07-23 05:39:18,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-23 05:39:18,579 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:18,579 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:18,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-23 05:39:18,580 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:18,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:18,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1656754904, now seen corresponding path program 1 times [2022-07-23 05:39:18,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:18,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637440874] [2022-07-23 05:39:18,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:18,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:18,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:39:18,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:18,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637440874] [2022-07-23 05:39:18,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637440874] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:39:18,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:39:18,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:39:18,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698437580] [2022-07-23 05:39:18,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:39:18,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:39:18,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:18,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:39:18,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:39:18,655 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:18,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:18,686 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-07-23 05:39:18,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:39:18,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-23 05:39:18,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:18,687 INFO L225 Difference]: With dead ends: 33 [2022-07-23 05:39:18,687 INFO L226 Difference]: Without dead ends: 20 [2022-07-23 05:39:18,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:39:18,688 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:18,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 54 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:39:18,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-23 05:39:18,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-07-23 05:39:18,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 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) [2022-07-23 05:39:18,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-07-23 05:39:18,690 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 19 [2022-07-23 05:39:18,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:18,690 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-07-23 05:39:18,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:18,690 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-07-23 05:39:18,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-23 05:39:18,690 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:18,691 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:18,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-23 05:39:18,691 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:18,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:18,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1617144038, now seen corresponding path program 1 times [2022-07-23 05:39:18,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:18,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529724256] [2022-07-23 05:39:18,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:18,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:18,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:18,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529724256] [2022-07-23 05:39:18,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529724256] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:39:18,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841388119] [2022-07-23 05:39:18,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:18,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:18,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:39:18,765 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) [2022-07-23 05:39:18,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-23 05:39:18,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:18,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 05:39:18,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:39:18,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:18,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:39:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:19,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841388119] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:39:19,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:39:19,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-07-23 05:39:19,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226744832] [2022-07-23 05:39:19,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:39:19,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-23 05:39:19,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:19,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-23 05:39:19,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-07-23 05:39:19,011 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:19,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:19,107 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-07-23 05:39:19,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:39:19,108 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-23 05:39:19,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:19,108 INFO L225 Difference]: With dead ends: 34 [2022-07-23 05:39:19,109 INFO L226 Difference]: Without dead ends: 27 [2022-07-23 05:39:19,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-07-23 05:39:19,110 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:19,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 103 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:39:19,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-23 05:39:19,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2022-07-23 05:39:19,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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) [2022-07-23 05:39:19,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-07-23 05:39:19,112 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2022-07-23 05:39:19,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:19,112 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-07-23 05:39:19,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:19,113 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-07-23 05:39:19,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-23 05:39:19,113 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:19,113 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:19,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-23 05:39:19,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:19,339 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:19,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:19,339 INFO L85 PathProgramCache]: Analyzing trace with hash -309577815, now seen corresponding path program 2 times [2022-07-23 05:39:19,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:19,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383395321] [2022-07-23 05:39:19,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:19,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:19,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:19,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383395321] [2022-07-23 05:39:19,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383395321] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:39:19,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864982863] [2022-07-23 05:39:19,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:39:19,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:19,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:39:19,496 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) [2022-07-23 05:39:19,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-23 05:39:19,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:39:19,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:39:19,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-23 05:39:19,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:39:19,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:19,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:39:19,834 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 [2022-07-23 05:39:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:19,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864982863] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:39:19,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:39:19,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-07-23 05:39:19,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414024798] [2022-07-23 05:39:19,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:39:19,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-23 05:39:19,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:19,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-23 05:39:19,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-07-23 05:39:19,847 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:20,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:20,099 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-07-23 05:39:20,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 05:39:20,100 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-23 05:39:20,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:20,100 INFO L225 Difference]: With dead ends: 30 [2022-07-23 05:39:20,101 INFO L226 Difference]: Without dead ends: 30 [2022-07-23 05:39:20,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2022-07-23 05:39:20,101 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 97 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:20,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 113 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:39:20,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-23 05:39:20,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-07-23 05:39:20,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:20,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-07-23 05:39:20,104 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2022-07-23 05:39:20,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:20,104 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-07-23 05:39:20,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:20,105 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-07-23 05:39:20,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-23 05:39:20,105 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:20,105 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:20,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-23 05:39:20,315 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,SelfDestructingSolverStorable11 [2022-07-23 05:39:20,316 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:20,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:20,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1540133135, now seen corresponding path program 3 times [2022-07-23 05:39:20,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:20,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53217141] [2022-07-23 05:39:20,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:20,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:20,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:20,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53217141] [2022-07-23 05:39:20,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53217141] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:39:20,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070498529] [2022-07-23 05:39:20,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:39:20,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:20,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:39:20,444 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) [2022-07-23 05:39:20,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-23 05:39:20,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-23 05:39:20,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:39:20,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-23 05:39:20,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:39:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:20,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:39:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:20,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070498529] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:39:20,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:39:20,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-07-23 05:39:20,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320572156] [2022-07-23 05:39:20,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:39:20,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-23 05:39:20,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:20,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-23 05:39:20,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-07-23 05:39:20,881 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:21,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:21,018 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2022-07-23 05:39:21,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 05:39:21,019 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-23 05:39:21,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:21,019 INFO L225 Difference]: With dead ends: 48 [2022-07-23 05:39:21,019 INFO L226 Difference]: Without dead ends: 36 [2022-07-23 05:39:21,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-07-23 05:39:21,020 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 55 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:21,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 123 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:39:21,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-23 05:39:21,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2022-07-23 05:39:21,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:21,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-07-23 05:39:21,023 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2022-07-23 05:39:21,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:21,023 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-07-23 05:39:21,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:21,023 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-07-23 05:39:21,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-23 05:39:21,023 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:21,024 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:21,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-23 05:39:21,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:21,224 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:21,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:21,225 INFO L85 PathProgramCache]: Analyzing trace with hash 884722574, now seen corresponding path program 4 times [2022-07-23 05:39:21,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:21,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23193725] [2022-07-23 05:39:21,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:21,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:21,381 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:21,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:21,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23193725] [2022-07-23 05:39:21,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23193725] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:39:21,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290918203] [2022-07-23 05:39:21,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:39:21,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:21,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:39:21,384 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) [2022-07-23 05:39:21,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-23 05:39:21,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:39:21,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:39:21,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-23 05:39:21,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:39:21,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 05:39:21,601 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:21,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:39:21,910 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:21,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290918203] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:39:21,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:39:21,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-07-23 05:39:21,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146976246] [2022-07-23 05:39:21,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:39:21,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-23 05:39:21,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:21,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-23 05:39:21,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-07-23 05:39:21,912 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 29 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) [2022-07-23 05:39:22,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:22,210 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2022-07-23 05:39:22,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-23 05:39:22,211 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 29 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 32 [2022-07-23 05:39:22,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:22,211 INFO L225 Difference]: With dead ends: 39 [2022-07-23 05:39:22,211 INFO L226 Difference]: Without dead ends: 39 [2022-07-23 05:39:22,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=1117, Unknown=0, NotChecked=0, Total=1406 [2022-07-23 05:39:22,212 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 143 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:22,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 137 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:39:22,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-23 05:39:22,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2022-07-23 05:39:22,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:22,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-07-23 05:39:22,215 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 32 [2022-07-23 05:39:22,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:22,215 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-07-23 05:39:22,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 29 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) [2022-07-23 05:39:22,215 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-07-23 05:39:22,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-23 05:39:22,216 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:22,216 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:22,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-23 05:39:22,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:22,424 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:22,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:22,424 INFO L85 PathProgramCache]: Analyzing trace with hash -510819796, now seen corresponding path program 5 times [2022-07-23 05:39:22,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:22,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478836232] [2022-07-23 05:39:22,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:22,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:22,581 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:22,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:22,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478836232] [2022-07-23 05:39:22,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478836232] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:39:22,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827030260] [2022-07-23 05:39:22,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:39:22,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:22,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:39:22,584 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) [2022-07-23 05:39:22,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-23 05:39:22,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-23 05:39:22,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:39:22,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-23 05:39:22,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:39:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:22,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:39:23,243 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:23,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827030260] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:39:23,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:39:23,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 26 [2022-07-23 05:39:23,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146048591] [2022-07-23 05:39:23,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:39:23,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-23 05:39:23,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:23,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-23 05:39:23,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-07-23 05:39:23,245 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:23,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:23,556 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2022-07-23 05:39:23,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-23 05:39:23,556 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-23 05:39:23,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:23,557 INFO L225 Difference]: With dead ends: 62 [2022-07-23 05:39:23,557 INFO L226 Difference]: Without dead ends: 45 [2022-07-23 05:39:23,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2022-07-23 05:39:23,558 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 68 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:23,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 238 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:39:23,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-23 05:39:23,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-07-23 05:39:23,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:23,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-07-23 05:39:23,560 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2022-07-23 05:39:23,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:23,560 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-07-23 05:39:23,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:23,561 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-07-23 05:39:23,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-23 05:39:23,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:23,561 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:23,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-23 05:39:23,771 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,SelfDestructingSolverStorable14 [2022-07-23 05:39:23,772 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:23,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:23,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1615395281, now seen corresponding path program 6 times [2022-07-23 05:39:23,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:23,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020106969] [2022-07-23 05:39:23,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:23,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:23,986 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:23,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:23,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020106969] [2022-07-23 05:39:23,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020106969] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:39:23,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272138762] [2022-07-23 05:39:23,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:39:23,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:23,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:39:23,989 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) [2022-07-23 05:39:23,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-23 05:39:24,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-23 05:39:24,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:39:24,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-23 05:39:24,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:39:24,323 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:24,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:39:24,557 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 23 treesize of output 19 [2022-07-23 05:39:24,689 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:24,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272138762] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:39:24,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:39:24,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-07-23 05:39:24,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618351852] [2022-07-23 05:39:24,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:39:24,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-23 05:39:24,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:24,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-23 05:39:24,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2022-07-23 05:39:24,691 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 32 states, 31 states have (on average 3.225806451612903) internal successors, (100), 32 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) [2022-07-23 05:39:25,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:25,336 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2022-07-23 05:39:25,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 05:39:25,337 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.225806451612903) internal successors, (100), 32 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 41 [2022-07-23 05:39:25,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:25,337 INFO L225 Difference]: With dead ends: 48 [2022-07-23 05:39:25,337 INFO L226 Difference]: Without dead ends: 48 [2022-07-23 05:39:25,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=443, Invalid=1627, Unknown=0, NotChecked=0, Total=2070 [2022-07-23 05:39:25,338 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 190 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:25,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 257 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:39:25,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-23 05:39:25,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-07-23 05:39:25,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 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) [2022-07-23 05:39:25,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2022-07-23 05:39:25,341 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 41 [2022-07-23 05:39:25,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:25,341 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2022-07-23 05:39:25,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.225806451612903) internal successors, (100), 32 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) [2022-07-23 05:39:25,341 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2022-07-23 05:39:25,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-23 05:39:25,342 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:25,342 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:25,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-23 05:39:25,551 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,SelfDestructingSolverStorable15 [2022-07-23 05:39:25,551 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:25,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:25,552 INFO L85 PathProgramCache]: Analyzing trace with hash 658687019, now seen corresponding path program 7 times [2022-07-23 05:39:25,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:25,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018350294] [2022-07-23 05:39:25,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:25,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:25,752 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:25,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:25,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018350294] [2022-07-23 05:39:25,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018350294] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:39:25,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283653399] [2022-07-23 05:39:25,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:39:25,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:25,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:39:25,756 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) [2022-07-23 05:39:25,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-23 05:39:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:25,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-23 05:39:25,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:39:26,060 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:26,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:39:26,379 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:26,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283653399] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:39:26,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:39:26,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2022-07-23 05:39:26,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757148203] [2022-07-23 05:39:26,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:39:26,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-23 05:39:26,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:26,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-23 05:39:26,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-07-23 05:39:26,381 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 28 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) [2022-07-23 05:39:26,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:26,711 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2022-07-23 05:39:26,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-23 05:39:26,711 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 28 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 [2022-07-23 05:39:26,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:26,712 INFO L225 Difference]: With dead ends: 76 [2022-07-23 05:39:26,712 INFO L226 Difference]: Without dead ends: 54 [2022-07-23 05:39:26,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2022-07-23 05:39:26,713 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 85 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:26,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 406 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:39:26,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-23 05:39:26,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2022-07-23 05:39:26,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:26,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2022-07-23 05:39:26,716 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 46 [2022-07-23 05:39:26,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:26,716 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2022-07-23 05:39:26,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 28 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) [2022-07-23 05:39:26,716 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2022-07-23 05:39:26,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-23 05:39:26,717 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:26,717 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:26,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-23 05:39:26,927 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,SelfDestructingSolverStorable16 [2022-07-23 05:39:26,927 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:26,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:26,928 INFO L85 PathProgramCache]: Analyzing trace with hash 40506248, now seen corresponding path program 8 times [2022-07-23 05:39:26,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:26,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80621132] [2022-07-23 05:39:26,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:26,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:26,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:27,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:27,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80621132] [2022-07-23 05:39:27,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80621132] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:39:27,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251237440] [2022-07-23 05:39:27,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:39:27,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:27,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:39:27,148 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) [2022-07-23 05:39:27,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-23 05:39:27,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:39:27,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:39:27,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-23 05:39:27,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:39:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 32 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:27,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:39:27,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-23 05:39:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 32 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:27,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251237440] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:39:27,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:39:27,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-23 05:39:27,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171740525] [2022-07-23 05:39:27,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:39:27,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-23 05:39:27,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:27,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-23 05:39:27,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2022-07-23 05:39:27,772 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 34 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 34 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:28,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:28,230 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2022-07-23 05:39:28,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-23 05:39:28,231 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 34 states have internal predecessors, (104), 0 states have call successors, (0), 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 [2022-07-23 05:39:28,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:28,231 INFO L225 Difference]: With dead ends: 57 [2022-07-23 05:39:28,231 INFO L226 Difference]: Without dead ends: 57 [2022-07-23 05:39:28,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=427, Invalid=1735, Unknown=0, NotChecked=0, Total=2162 [2022-07-23 05:39:28,232 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 169 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:28,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 228 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:39:28,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-23 05:39:28,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-07-23 05:39:28,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 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) [2022-07-23 05:39:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2022-07-23 05:39:28,236 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 50 [2022-07-23 05:39:28,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:28,236 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2022-07-23 05:39:28,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 34 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:28,236 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2022-07-23 05:39:28,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-23 05:39:28,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:28,237 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:28,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-23 05:39:28,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-23 05:39:28,447 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:28,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:28,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1129260658, now seen corresponding path program 9 times [2022-07-23 05:39:28,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:28,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734623802] [2022-07-23 05:39:28,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:28,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 10 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:28,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:28,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734623802] [2022-07-23 05:39:28,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734623802] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:39:28,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820378302] [2022-07-23 05:39:28,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:39:28,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:28,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:39:28,673 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) [2022-07-23 05:39:28,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-23 05:39:28,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-23 05:39:28,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:39:28,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-23 05:39:28,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:39:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 10 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:29,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:39:29,474 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 10 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:29,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820378302] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:39:29,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:39:29,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2022-07-23 05:39:29,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240455085] [2022-07-23 05:39:29,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:39:29,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-23 05:39:29,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:29,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-23 05:39:29,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2022-07-23 05:39:29,476 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 31 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 31 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:29,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:29,955 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2022-07-23 05:39:29,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-23 05:39:29,956 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 31 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-23 05:39:29,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:29,956 INFO L225 Difference]: With dead ends: 90 [2022-07-23 05:39:29,956 INFO L226 Difference]: Without dead ends: 63 [2022-07-23 05:39:29,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2022-07-23 05:39:29,957 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 61 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:29,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 611 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:39:29,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-23 05:39:29,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2022-07-23 05:39:29,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 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) [2022-07-23 05:39:29,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-07-23 05:39:29,960 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 55 [2022-07-23 05:39:29,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:29,960 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-07-23 05:39:29,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 31 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:29,960 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-07-23 05:39:29,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-23 05:39:29,961 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:29,961 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:29,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-23 05:39:30,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:30,162 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:30,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:30,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1822347189, now seen corresponding path program 10 times [2022-07-23 05:39:30,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:30,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609763785] [2022-07-23 05:39:30,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:30,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 28 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:30,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:30,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609763785] [2022-07-23 05:39:30,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609763785] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:39:30,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718812399] [2022-07-23 05:39:30,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:39:30,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:30,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:39:30,440 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) [2022-07-23 05:39:30,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-23 05:39:30,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:39:30,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:39:30,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-23 05:39:30,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:39:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 50 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:30,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:39:31,146 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 [2022-07-23 05:39:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 50 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:31,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718812399] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:39:31,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:39:31,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 37 [2022-07-23 05:39:31,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230810676] [2022-07-23 05:39:31,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:39:31,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-23 05:39:31,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:31,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-23 05:39:31,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2022-07-23 05:39:31,173 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 38 states, 37 states have (on average 3.2972972972972974) internal successors, (122), 38 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:31,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:31,897 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2022-07-23 05:39:31,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-23 05:39:31,898 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.2972972972972974) internal successors, (122), 38 states have internal predecessors, (122), 0 states have call successors, (0), 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 59 [2022-07-23 05:39:31,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:31,898 INFO L225 Difference]: With dead ends: 66 [2022-07-23 05:39:31,898 INFO L226 Difference]: Without dead ends: 66 [2022-07-23 05:39:31,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=651, Invalid=2655, Unknown=0, NotChecked=0, Total=3306 [2022-07-23 05:39:31,900 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 323 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:31,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 363 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:39:31,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-23 05:39:31,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-07-23 05:39:31,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.046875) internal successors, (67), 64 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) [2022-07-23 05:39:31,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2022-07-23 05:39:31,902 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 59 [2022-07-23 05:39:31,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:31,903 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2022-07-23 05:39:31,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.2972972972972974) internal successors, (122), 38 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:31,903 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2022-07-23 05:39:31,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-23 05:39:31,904 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:31,904 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:31,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-23 05:39:32,119 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,SelfDestructingSolverStorable19 [2022-07-23 05:39:32,119 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:32,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:32,120 INFO L85 PathProgramCache]: Analyzing trace with hash 897187429, now seen corresponding path program 11 times [2022-07-23 05:39:32,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:32,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726898597] [2022-07-23 05:39:32,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:32,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 12 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:32,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:32,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726898597] [2022-07-23 05:39:32,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726898597] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:39:32,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31225543] [2022-07-23 05:39:32,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:39:32,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:32,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:39:32,358 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) [2022-07-23 05:39:32,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-23 05:39:32,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-23 05:39:32,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:39:32,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-23 05:39:32,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:39:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 12 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:32,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:39:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 12 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:33,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31225543] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:39:33,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:39:33,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2022-07-23 05:39:33,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418230421] [2022-07-23 05:39:33,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:39:33,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-23 05:39:33,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:33,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-23 05:39:33,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2022-07-23 05:39:33,312 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:33,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:33,882 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2022-07-23 05:39:33,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-23 05:39:33,882 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-23 05:39:33,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:33,883 INFO L225 Difference]: With dead ends: 104 [2022-07-23 05:39:33,883 INFO L226 Difference]: Without dead ends: 72 [2022-07-23 05:39:33,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=203, Invalid=2149, Unknown=0, NotChecked=0, Total=2352 [2022-07-23 05:39:33,884 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 76 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:33,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 787 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:39:33,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-23 05:39:33,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2022-07-23 05:39:33,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 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) [2022-07-23 05:39:33,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-07-23 05:39:33,886 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 64 [2022-07-23 05:39:33,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:33,886 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-07-23 05:39:33,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:33,886 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-07-23 05:39:33,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-23 05:39:33,887 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:33,887 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:33,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-23 05:39:34,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:34,087 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:34,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:34,088 INFO L85 PathProgramCache]: Analyzing trace with hash 2146504834, now seen corresponding path program 12 times [2022-07-23 05:39:34,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:34,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406345412] [2022-07-23 05:39:34,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:34,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 45 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:34,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:34,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406345412] [2022-07-23 05:39:34,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406345412] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:39:34,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188539351] [2022-07-23 05:39:34,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:39:34,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:34,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:39:34,347 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) [2022-07-23 05:39:34,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-23 05:39:34,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-23 05:39:34,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:39:34,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-23 05:39:34,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:39:34,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 05:39:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 66 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:35,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:39:35,845 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 91 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:35,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188539351] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:39:35,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:39:35,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2022-07-23 05:39:35,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082651413] [2022-07-23 05:39:35,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:39:35,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-23 05:39:35,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:35,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-23 05:39:35,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=2724, Unknown=0, NotChecked=0, Total=3080 [2022-07-23 05:39:35,847 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 56 states, 55 states have (on average 3.5636363636363635) internal successors, (196), 56 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:36,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:36,987 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2022-07-23 05:39:36,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-23 05:39:36,989 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 3.5636363636363635) internal successors, (196), 56 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-23 05:39:36,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:36,990 INFO L225 Difference]: With dead ends: 75 [2022-07-23 05:39:36,990 INFO L226 Difference]: Without dead ends: 75 [2022-07-23 05:39:36,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1222, Invalid=4940, Unknown=0, NotChecked=0, Total=6162 [2022-07-23 05:39:36,992 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 341 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:36,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 373 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:39:36,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-23 05:39:36,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-07-23 05:39:36,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:36,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2022-07-23 05:39:36,994 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 68 [2022-07-23 05:39:36,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:36,995 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2022-07-23 05:39:36,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 3.5636363636363635) internal successors, (196), 56 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:36,995 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2022-07-23 05:39:36,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-23 05:39:36,995 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:36,996 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:37,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-23 05:39:37,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:37,201 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:37,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:37,202 INFO L85 PathProgramCache]: Analyzing trace with hash -111069768, now seen corresponding path program 13 times [2022-07-23 05:39:37,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:37,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807332044] [2022-07-23 05:39:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:37,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:37,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 14 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:37,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:37,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807332044] [2022-07-23 05:39:37,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807332044] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:39:37,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768014490] [2022-07-23 05:39:37,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:39:37,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:37,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:39:37,492 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) [2022-07-23 05:39:37,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-23 05:39:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:37,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-23 05:39:37,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:39:37,787 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 14 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:37,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:39:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 14 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:38,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768014490] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:39:38,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:39:38,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 39 [2022-07-23 05:39:38,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057188043] [2022-07-23 05:39:38,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:39:38,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-23 05:39:38,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:38,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-23 05:39:38,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2022-07-23 05:39:38,320 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 39 states, 39 states have (on average 3.717948717948718) internal successors, (145), 39 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:39,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:39,006 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2022-07-23 05:39:39,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-23 05:39:39,006 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.717948717948718) internal successors, (145), 39 states have internal predecessors, (145), 0 states have call successors, (0), 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 [2022-07-23 05:39:39,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:39,007 INFO L225 Difference]: With dead ends: 118 [2022-07-23 05:39:39,007 INFO L226 Difference]: Without dead ends: 81 [2022-07-23 05:39:39,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=223, Invalid=2639, Unknown=0, NotChecked=0, Total=2862 [2022-07-23 05:39:39,008 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 113 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:39,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 921 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 05:39:39,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-23 05:39:39,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2022-07-23 05:39:39,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:39,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2022-07-23 05:39:39,010 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 73 [2022-07-23 05:39:39,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:39,011 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2022-07-23 05:39:39,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.717948717948718) internal successors, (145), 39 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:39,011 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2022-07-23 05:39:39,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-23 05:39:39,012 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:39,012 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:39,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-23 05:39:39,226 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,SelfDestructingSolverStorable22 [2022-07-23 05:39:39,227 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:39,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:39,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1527788603, now seen corresponding path program 14 times [2022-07-23 05:39:39,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:39,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444444594] [2022-07-23 05:39:39,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:39,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:39,552 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 66 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:39,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:39,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444444594] [2022-07-23 05:39:39,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444444594] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:39:39,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969894601] [2022-07-23 05:39:39,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:39:39,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:39,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:39:39,556 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) [2022-07-23 05:39:39,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-23 05:39:39,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:39:39,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:39:39,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-23 05:39:39,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:39:39,943 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 98 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:39,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:39:40,301 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 [2022-07-23 05:39:40,327 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 98 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:40,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969894601] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:39:40,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:39:40,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 45 [2022-07-23 05:39:40,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352286967] [2022-07-23 05:39:40,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:39:40,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-23 05:39:40,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:40,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-23 05:39:40,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1838, Unknown=0, NotChecked=0, Total=2070 [2022-07-23 05:39:40,330 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 46 states, 45 states have (on average 3.511111111111111) internal successors, (158), 46 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) [2022-07-23 05:39:41,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:41,121 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2022-07-23 05:39:41,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-23 05:39:41,122 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.511111111111111) internal successors, (158), 46 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 77 [2022-07-23 05:39:41,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:41,123 INFO L225 Difference]: With dead ends: 84 [2022-07-23 05:39:41,123 INFO L226 Difference]: Without dead ends: 84 [2022-07-23 05:39:41,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=811, Invalid=3349, Unknown=0, NotChecked=0, Total=4160 [2022-07-23 05:39:41,124 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 286 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:41,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 622 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 05:39:41,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-23 05:39:41,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-07-23 05:39:41,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 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) [2022-07-23 05:39:41,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2022-07-23 05:39:41,127 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 77 [2022-07-23 05:39:41,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:41,127 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2022-07-23 05:39:41,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.511111111111111) internal successors, (158), 46 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) [2022-07-23 05:39:41,128 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2022-07-23 05:39:41,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-23 05:39:41,128 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:41,128 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:41,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-23 05:39:41,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:41,339 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:41,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:41,340 INFO L85 PathProgramCache]: Analyzing trace with hash 787512735, now seen corresponding path program 15 times [2022-07-23 05:39:41,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:41,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155728104] [2022-07-23 05:39:41,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:41,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 16 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:41,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:41,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155728104] [2022-07-23 05:39:41,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155728104] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:39:41,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511164730] [2022-07-23 05:39:41,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:39:41,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:41,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:39:41,740 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) [2022-07-23 05:39:41,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-23 05:39:42,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-23 05:39:42,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:39:42,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-23 05:39:42,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:39:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 16 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:42,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:39:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 16 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:43,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511164730] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:39:43,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:39:43,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 44 [2022-07-23 05:39:43,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504883510] [2022-07-23 05:39:43,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:39:43,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-23 05:39:43,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:43,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-23 05:39:43,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1772, Unknown=0, NotChecked=0, Total=1892 [2022-07-23 05:39:43,213 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 44 states, 44 states have (on average 3.727272727272727) internal successors, (164), 44 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:44,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:44,011 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2022-07-23 05:39:44,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-23 05:39:44,011 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.727272727272727) internal successors, (164), 44 states have internal predecessors, (164), 0 states have call successors, (0), 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 82 [2022-07-23 05:39:44,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:44,011 INFO L225 Difference]: With dead ends: 132 [2022-07-23 05:39:44,011 INFO L226 Difference]: Without dead ends: 90 [2022-07-23 05:39:44,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=253, Invalid=3407, Unknown=0, NotChecked=0, Total=3660 [2022-07-23 05:39:44,013 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 160 mSDsluCounter, 1142 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:44,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 1188 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 05:39:44,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-23 05:39:44,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2022-07-23 05:39:44,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:44,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2022-07-23 05:39:44,015 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 82 [2022-07-23 05:39:44,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:44,015 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2022-07-23 05:39:44,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.727272727272727) internal successors, (164), 44 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:44,016 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2022-07-23 05:39:44,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-23 05:39:44,016 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:44,016 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:44,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-23 05:39:44,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:44,223 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:44,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:44,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1328274820, now seen corresponding path program 16 times [2022-07-23 05:39:44,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:44,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659153584] [2022-07-23 05:39:44,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:44,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:44,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 91 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:44,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:44,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659153584] [2022-07-23 05:39:44,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659153584] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:39:44,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444270070] [2022-07-23 05:39:44,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:39:44,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:44,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:39:44,620 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) [2022-07-23 05:39:44,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-23 05:39:44,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:39:44,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:39:44,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 90 conjunts are in the unsatisfiable core [2022-07-23 05:39:44,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:39:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 128 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:45,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:39:45,659 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 [2022-07-23 05:39:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 128 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:45,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444270070] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:39:45,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:39:45,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 49 [2022-07-23 05:39:45,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799411827] [2022-07-23 05:39:45,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:39:45,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-23 05:39:45,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:45,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-23 05:39:45,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=2220, Unknown=0, NotChecked=0, Total=2450 [2022-07-23 05:39:45,709 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 50 states, 49 states have (on average 3.5918367346938775) internal successors, (176), 50 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) [2022-07-23 05:39:46,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:46,846 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2022-07-23 05:39:46,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-23 05:39:46,846 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.5918367346938775) internal successors, (176), 50 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 86 [2022-07-23 05:39:46,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:46,847 INFO L225 Difference]: With dead ends: 93 [2022-07-23 05:39:46,847 INFO L226 Difference]: Without dead ends: 93 [2022-07-23 05:39:46,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1215, Invalid=4947, Unknown=0, NotChecked=0, Total=6162 [2022-07-23 05:39:46,849 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 401 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:46,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 661 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 05:39:46,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-23 05:39:46,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-07-23 05:39:46,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.032967032967033) internal successors, (94), 91 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) [2022-07-23 05:39:46,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2022-07-23 05:39:46,852 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 86 [2022-07-23 05:39:46,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:46,852 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2022-07-23 05:39:46,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.5918367346938775) internal successors, (176), 50 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) [2022-07-23 05:39:46,852 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2022-07-23 05:39:46,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-23 05:39:46,853 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:46,853 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:46,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-23 05:39:47,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:47,078 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:47,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:47,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1956884482, now seen corresponding path program 17 times [2022-07-23 05:39:47,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:47,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384739036] [2022-07-23 05:39:47,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:47,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 18 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:47,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:47,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384739036] [2022-07-23 05:39:47,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384739036] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:39:47,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448643472] [2022-07-23 05:39:47,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:39:47,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:47,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:39:47,460 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) [2022-07-23 05:39:47,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-23 05:39:48,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-23 05:39:48,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:39:48,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-23 05:39:48,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:39:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 18 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:48,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:39:49,028 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 18 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:49,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448643472] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:39:49,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:39:49,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2022-07-23 05:39:49,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019821197] [2022-07-23 05:39:49,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:39:49,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-23 05:39:49,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:49,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-23 05:39:49,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2036, Unknown=0, NotChecked=0, Total=2162 [2022-07-23 05:39:49,030 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 47 states, 47 states have (on average 3.851063829787234) internal successors, (181), 47 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:50,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:50,032 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2022-07-23 05:39:50,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-23 05:39:50,032 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.851063829787234) internal successors, (181), 47 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-07-23 05:39:50,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:50,033 INFO L225 Difference]: With dead ends: 146 [2022-07-23 05:39:50,033 INFO L226 Difference]: Without dead ends: 99 [2022-07-23 05:39:50,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 156 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=273, Invalid=4017, Unknown=0, NotChecked=0, Total=4290 [2022-07-23 05:39:50,033 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 101 mSDsluCounter, 1544 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:50,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 1595 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1385 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-23 05:39:50,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-23 05:39:50,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2022-07-23 05:39:50,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 95 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:50,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2022-07-23 05:39:50,036 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 91 [2022-07-23 05:39:50,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:50,036 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2022-07-23 05:39:50,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.851063829787234) internal successors, (181), 47 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:50,037 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2022-07-23 05:39:50,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-23 05:39:50,037 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:50,037 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:50,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-23 05:39:50,243 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,SelfDestructingSolverStorable26 [2022-07-23 05:39:50,243 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:50,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:50,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1756877761, now seen corresponding path program 18 times [2022-07-23 05:39:50,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:50,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454962949] [2022-07-23 05:39:50,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:50,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:50,689 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 120 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:50,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:50,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454962949] [2022-07-23 05:39:50,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454962949] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:39:50,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066530794] [2022-07-23 05:39:50,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:39:50,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:50,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:39:50,691 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) [2022-07-23 05:39:50,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-23 05:39:50,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-07-23 05:39:50,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:39:50,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-23 05:39:50,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:39:51,586 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 162 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:51,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:39:52,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-23 05:39:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 162 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:52,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066530794] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:39:52,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:39:52,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 63 [2022-07-23 05:39:52,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091058758] [2022-07-23 05:39:52,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:39:52,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-23 05:39:52,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:52,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-23 05:39:52,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=476, Invalid=3556, Unknown=0, NotChecked=0, Total=4032 [2022-07-23 05:39:52,200 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 64 states, 63 states have (on average 3.7936507936507935) internal successors, (239), 64 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:53,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:53,519 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2022-07-23 05:39:53,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-23 05:39:53,519 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 3.7936507936507935) internal successors, (239), 64 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-07-23 05:39:53,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:53,520 INFO L225 Difference]: With dead ends: 102 [2022-07-23 05:39:53,520 INFO L226 Difference]: Without dead ends: 102 [2022-07-23 05:39:53,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1784, Invalid=7336, Unknown=0, NotChecked=0, Total=9120 [2022-07-23 05:39:53,521 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 561 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:53,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 616 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:39:53,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-23 05:39:53,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2022-07-23 05:39:53,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:53,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2022-07-23 05:39:53,523 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 95 [2022-07-23 05:39:53,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:53,523 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2022-07-23 05:39:53,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 3.7936507936507935) internal successors, (239), 64 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:53,524 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2022-07-23 05:39:53,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-23 05:39:53,524 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:53,524 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:53,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-23 05:39:53,727 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,SelfDestructingSolverStorable27 [2022-07-23 05:39:53,727 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:53,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:53,728 INFO L85 PathProgramCache]: Analyzing trace with hash -924999207, now seen corresponding path program 19 times [2022-07-23 05:39:53,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:53,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327751031] [2022-07-23 05:39:53,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:53,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:54,146 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 20 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:54,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:54,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327751031] [2022-07-23 05:39:54,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327751031] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:39:54,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755389847] [2022-07-23 05:39:54,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:39:54,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:54,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:39:54,148 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) [2022-07-23 05:39:54,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-23 05:39:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:54,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-23 05:39:54,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:39:54,528 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 20 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:54,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:39:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 20 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:55,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755389847] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:39:55,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:39:55,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 52 [2022-07-23 05:39:55,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314015043] [2022-07-23 05:39:55,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:39:55,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-23 05:39:55,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:55,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-23 05:39:55,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2512, Unknown=0, NotChecked=0, Total=2652 [2022-07-23 05:39:55,395 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 52 states, 52 states have (on average 3.8461538461538463) internal successors, (200), 52 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:56,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:39:56,526 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2022-07-23 05:39:56,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-23 05:39:56,527 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.8461538461538463) internal successors, (200), 52 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2022-07-23 05:39:56,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:39:56,527 INFO L225 Difference]: With dead ends: 160 [2022-07-23 05:39:56,528 INFO L226 Difference]: Without dead ends: 108 [2022-07-23 05:39:56,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=303, Invalid=4953, Unknown=0, NotChecked=0, Total=5256 [2022-07-23 05:39:56,529 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 111 mSDsluCounter, 1799 mSDsCounter, 0 mSdLazyCounter, 1587 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1855 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 05:39:56,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 1855 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1587 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-23 05:39:56,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-23 05:39:56,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2022-07-23 05:39:56,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 104 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:56,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2022-07-23 05:39:56,531 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2022-07-23 05:39:56,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:39:56,532 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2022-07-23 05:39:56,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.8461538461538463) internal successors, (200), 52 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:39:56,532 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2022-07-23 05:39:56,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-23 05:39:56,533 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:39:56,533 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:39:56,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-23 05:39:56,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-23 05:39:56,739 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:39:56,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:39:56,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1790355830, now seen corresponding path program 20 times [2022-07-23 05:39:56,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:39:56,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016830977] [2022-07-23 05:39:56,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:39:56,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:39:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:39:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 153 proven. 323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:57,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:39:57,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016830977] [2022-07-23 05:39:57,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016830977] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:39:57,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550633787] [2022-07-23 05:39:57,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:39:57,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:39:57,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:39:57,231 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) [2022-07-23 05:39:57,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-23 05:39:57,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:39:57,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:39:57,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 112 conjunts are in the unsatisfiable core [2022-07-23 05:39:57,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:39:57,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 05:39:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 190 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:58,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:39:59,660 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 231 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:39:59,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550633787] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:39:59,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:39:59,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 79 [2022-07-23 05:39:59,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395087279] [2022-07-23 05:39:59,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:39:59,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-23 05:39:59,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:39:59,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-23 05:39:59,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=5683, Unknown=0, NotChecked=0, Total=6320 [2022-07-23 05:39:59,663 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 80 states, 79 states have (on average 3.848101265822785) internal successors, (304), 80 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:01,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:40:01,630 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2022-07-23 05:40:01,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-23 05:40:01,631 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 3.848101265822785) internal successors, (304), 80 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2022-07-23 05:40:01,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:40:01,631 INFO L225 Difference]: With dead ends: 111 [2022-07-23 05:40:01,631 INFO L226 Difference]: Without dead ends: 111 [2022-07-23 05:40:01,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2660 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2384, Invalid=10726, Unknown=0, NotChecked=0, Total=13110 [2022-07-23 05:40:01,633 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 424 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 05:40:01,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 1061 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1533 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-23 05:40:01,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-23 05:40:01,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2022-07-23 05:40:01,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0275229357798166) internal successors, (112), 109 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:01,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2022-07-23 05:40:01,638 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 104 [2022-07-23 05:40:01,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:40:01,638 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2022-07-23 05:40:01,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 3.848101265822785) internal successors, (304), 80 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:01,638 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2022-07-23 05:40:01,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-23 05:40:01,639 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:40:01,639 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:40:01,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-23 05:40:01,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:40:01,851 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:40:01,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:40:01,852 INFO L85 PathProgramCache]: Analyzing trace with hash 45684036, now seen corresponding path program 21 times [2022-07-23 05:40:01,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:40:01,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094138773] [2022-07-23 05:40:01,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:40:01,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:40:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:40:02,287 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 22 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:02,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:40:02,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094138773] [2022-07-23 05:40:02,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094138773] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:40:02,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082008541] [2022-07-23 05:40:02,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:40:02,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:40:02,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:40:02,289 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) [2022-07-23 05:40:02,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-23 05:40:02,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-07-23 05:40:02,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:40:02,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-23 05:40:02,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:40:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 22 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:03,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:40:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 22 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:04,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082008541] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:40:04,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:40:04,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 55 [2022-07-23 05:40:04,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208093311] [2022-07-23 05:40:04,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:40:04,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-23 05:40:04,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:40:04,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-23 05:40:04,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2824, Unknown=0, NotChecked=0, Total=2970 [2022-07-23 05:40:04,022 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand has 55 states, 55 states have (on average 3.9454545454545453) internal successors, (217), 55 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:05,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:40:05,377 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2022-07-23 05:40:05,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-23 05:40:05,377 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.9454545454545453) internal successors, (217), 55 states have internal predecessors, (217), 0 states have call successors, (0), 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 109 [2022-07-23 05:40:05,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:40:05,378 INFO L225 Difference]: With dead ends: 174 [2022-07-23 05:40:05,378 INFO L226 Difference]: Without dead ends: 117 [2022-07-23 05:40:05,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=323, Invalid=5683, Unknown=0, NotChecked=0, Total=6006 [2022-07-23 05:40:05,379 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 217 mSDsluCounter, 2055 mSDsCounter, 0 mSdLazyCounter, 1782 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 2116 SdHoareTripleChecker+Invalid, 1840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-23 05:40:05,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 2116 Invalid, 1840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1782 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-23 05:40:05,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-23 05:40:05,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2022-07-23 05:40:05,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0265486725663717) internal successors, (116), 113 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:05,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2022-07-23 05:40:05,382 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 109 [2022-07-23 05:40:05,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:40:05,382 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2022-07-23 05:40:05,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.9454545454545453) internal successors, (217), 55 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:05,383 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2022-07-23 05:40:05,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-23 05:40:05,383 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:40:05,383 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:40:05,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-23 05:40:05,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:40:05,587 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:40:05,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:40:05,588 INFO L85 PathProgramCache]: Analyzing trace with hash 941772359, now seen corresponding path program 22 times [2022-07-23 05:40:05,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:40:05,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553777462] [2022-07-23 05:40:05,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:40:05,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:40:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:40:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 190 proven. 383 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:06,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:40:06,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553777462] [2022-07-23 05:40:06,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553777462] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:40:06,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552205157] [2022-07-23 05:40:06,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:40:06,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:40:06,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:40:06,163 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) [2022-07-23 05:40:06,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-23 05:40:06,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:40:06,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:40:06,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 117 conjunts are in the unsatisfiable core [2022-07-23 05:40:06,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:40:06,862 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 242 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:06,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:40:07,445 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 [2022-07-23 05:40:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 242 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:07,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552205157] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:40:07,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:40:07,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 61 [2022-07-23 05:40:07,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381626457] [2022-07-23 05:40:07,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:40:07,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-23 05:40:07,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:40:07,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-23 05:40:07,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=3358, Unknown=0, NotChecked=0, Total=3782 [2022-07-23 05:40:07,498 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand has 62 states, 61 states have (on average 3.7704918032786887) internal successors, (230), 62 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:08,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:40:08,660 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2022-07-23 05:40:08,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-23 05:40:08,660 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 3.7704918032786887) internal successors, (230), 62 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-07-23 05:40:08,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:40:08,661 INFO L225 Difference]: With dead ends: 120 [2022-07-23 05:40:08,661 INFO L226 Difference]: Without dead ends: 120 [2022-07-23 05:40:08,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1519, Invalid=6313, Unknown=0, NotChecked=0, Total=7832 [2022-07-23 05:40:08,662 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 675 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:40:08,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 862 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-23 05:40:08,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-23 05:40:08,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2022-07-23 05:40:08,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0254237288135593) internal successors, (121), 118 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:08,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2022-07-23 05:40:08,665 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 113 [2022-07-23 05:40:08,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:40:08,665 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2022-07-23 05:40:08,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 3.7704918032786887) internal successors, (230), 62 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:08,666 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2022-07-23 05:40:08,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-23 05:40:08,666 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:40:08,666 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:40:08,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-23 05:40:08,875 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,SelfDestructingSolverStorable31 [2022-07-23 05:40:08,875 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:40:08,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:40:08,876 INFO L85 PathProgramCache]: Analyzing trace with hash 530107155, now seen corresponding path program 23 times [2022-07-23 05:40:08,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:40:08,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136381442] [2022-07-23 05:40:08,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:40:08,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:40:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:40:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 24 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:09,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:40:09,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136381442] [2022-07-23 05:40:09,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136381442] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:40:09,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971413747] [2022-07-23 05:40:09,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:40:09,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:40:09,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:40:09,355 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) [2022-07-23 05:40:09,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-23 05:40:10,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-07-23 05:40:10,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:40:10,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-23 05:40:10,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:40:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 24 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:11,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:40:12,262 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 24 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:12,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971413747] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:40:12,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:40:12,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 60 [2022-07-23 05:40:12,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260611304] [2022-07-23 05:40:12,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:40:12,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-23 05:40:12,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:40:12,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-23 05:40:12,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3380, Unknown=0, NotChecked=0, Total=3540 [2022-07-23 05:40:12,264 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 60 states, 60 states have (on average 3.933333333333333) 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) [2022-07-23 05:40:13,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:40:13,822 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2022-07-23 05:40:13,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-23 05:40:13,822 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.933333333333333) 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 118 [2022-07-23 05:40:13,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:40:13,822 INFO L225 Difference]: With dead ends: 188 [2022-07-23 05:40:13,823 INFO L226 Difference]: Without dead ends: 126 [2022-07-23 05:40:13,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=353, Invalid=6787, Unknown=0, NotChecked=0, Total=7140 [2022-07-23 05:40:13,823 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 188 mSDsluCounter, 2586 mSDsCounter, 0 mSdLazyCounter, 2217 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 2652 SdHoareTripleChecker+Invalid, 2268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 05:40:13,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 2652 Invalid, 2268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2217 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-23 05:40:13,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-23 05:40:13,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2022-07-23 05:40:13,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:13,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2022-07-23 05:40:13,826 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 118 [2022-07-23 05:40:13,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:40:13,826 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2022-07-23 05:40:13,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.933333333333333) 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) [2022-07-23 05:40:13,826 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2022-07-23 05:40:13,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-23 05:40:13,827 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:40:13,827 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:40:13,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-07-23 05:40:14,027 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,SelfDestructingSolverStorable32 [2022-07-23 05:40:14,028 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:40:14,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:40:14,028 INFO L85 PathProgramCache]: Analyzing trace with hash 660342128, now seen corresponding path program 24 times [2022-07-23 05:40:14,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:40:14,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004470194] [2022-07-23 05:40:14,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:40:14,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:40:14,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:40:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 231 proven. 448 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:14,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:40:14,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004470194] [2022-07-23 05:40:14,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004470194] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:40:14,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199921432] [2022-07-23 05:40:14,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:40:14,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:40:14,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:40:14,637 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) [2022-07-23 05:40:14,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-23 05:40:15,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-07-23 05:40:15,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:40:15,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 105 conjunts are in the unsatisfiable core [2022-07-23 05:40:15,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:40:15,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 05:40:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 288 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:16,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:40:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 288 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:17,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199921432] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:40:17,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:40:17,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 91 [2022-07-23 05:40:17,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511521097] [2022-07-23 05:40:17,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:40:17,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-07-23 05:40:17,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:40:17,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-07-23 05:40:17,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=939, Invalid=7433, Unknown=0, NotChecked=0, Total=8372 [2022-07-23 05:40:17,469 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand has 92 states, 91 states have (on average 3.934065934065934) internal successors, (358), 92 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:19,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:40:19,404 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2022-07-23 05:40:19,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-23 05:40:19,405 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 3.934065934065934) internal successors, (358), 92 states have internal predecessors, (358), 0 states have call successors, (0), 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 122 [2022-07-23 05:40:19,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:40:19,405 INFO L225 Difference]: With dead ends: 129 [2022-07-23 05:40:19,405 INFO L226 Difference]: Without dead ends: 129 [2022-07-23 05:40:19,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3347 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3473, Invalid=14083, Unknown=0, NotChecked=0, Total=17556 [2022-07-23 05:40:19,407 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 878 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:40:19,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [878 Valid, 854 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-23 05:40:19,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-23 05:40:19,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2022-07-23 05:40:19,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.0236220472440944) internal successors, (130), 127 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:19,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2022-07-23 05:40:19,410 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 122 [2022-07-23 05:40:19,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:40:19,410 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2022-07-23 05:40:19,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 3.934065934065934) internal successors, (358), 92 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:19,410 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2022-07-23 05:40:19,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-23 05:40:19,411 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:40:19,411 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:40:19,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-07-23 05:40:19,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:40:19,618 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:40:19,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:40:19,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1490036106, now seen corresponding path program 25 times [2022-07-23 05:40:19,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:40:19,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352565310] [2022-07-23 05:40:19,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:40:19,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:40:19,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:40:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 26 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:20,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:40:20,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352565310] [2022-07-23 05:40:20,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352565310] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:40:20,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363034026] [2022-07-23 05:40:20,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:40:20,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:40:20,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:40:20,223 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) [2022-07-23 05:40:20,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-23 05:40:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:40:20,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-23 05:40:20,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:40:20,747 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 26 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:20,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:40:22,056 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 26 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:22,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363034026] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:40:22,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:40:22,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2022-07-23 05:40:22,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105181921] [2022-07-23 05:40:22,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:40:22,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-23 05:40:22,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:40:22,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-23 05:40:22,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3740, Unknown=0, NotChecked=0, Total=3906 [2022-07-23 05:40:22,059 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 63 states, 63 states have (on average 4.015873015873016) internal successors, (253), 63 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:23,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:40:23,861 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2022-07-23 05:40:23,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-23 05:40:23,862 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 4.015873015873016) internal successors, (253), 63 states have internal predecessors, (253), 0 states have call successors, (0), 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 127 [2022-07-23 05:40:23,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:40:23,862 INFO L225 Difference]: With dead ends: 202 [2022-07-23 05:40:23,862 INFO L226 Difference]: Without dead ends: 135 [2022-07-23 05:40:23,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 220 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=373, Invalid=7637, Unknown=0, NotChecked=0, Total=8010 [2022-07-23 05:40:23,863 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 253 mSDsluCounter, 2780 mSDsCounter, 0 mSdLazyCounter, 2374 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 2851 SdHoareTripleChecker+Invalid, 2442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:40:23,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 2851 Invalid, 2442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2374 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-23 05:40:23,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-23 05:40:23,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2022-07-23 05:40:23,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:23,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2022-07-23 05:40:23,867 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 127 [2022-07-23 05:40:23,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:40:23,868 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2022-07-23 05:40:23,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 4.015873015873016) internal successors, (253), 63 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:23,868 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2022-07-23 05:40:23,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-23 05:40:23,869 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:40:23,869 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:40:23,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-23 05:40:24,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:40:24,075 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:40:24,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:40:24,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1094958131, now seen corresponding path program 26 times [2022-07-23 05:40:24,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:40:24,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375277830] [2022-07-23 05:40:24,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:40:24,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:40:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:40:24,760 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 276 proven. 518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:24,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:40:24,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375277830] [2022-07-23 05:40:24,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375277830] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:40:24,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496712795] [2022-07-23 05:40:24,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:40:24,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:40:24,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:40:24,762 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) [2022-07-23 05:40:24,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-23 05:40:24,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:40:24,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:40:24,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 135 conjunts are in the unsatisfiable core [2022-07-23 05:40:24,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:40:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 338 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:25,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:40:26,179 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 [2022-07-23 05:40:26,249 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 338 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:26,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496712795] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:40:26,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:40:26,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 69 [2022-07-23 05:40:26,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681603389] [2022-07-23 05:40:26,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:40:26,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-07-23 05:40:26,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:40:26,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-07-23 05:40:26,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=4286, Unknown=0, NotChecked=0, Total=4830 [2022-07-23 05:40:26,251 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 70 states, 69 states have (on average 3.8550724637681157) internal successors, (266), 70 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:27,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:40:27,711 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2022-07-23 05:40:27,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-23 05:40:27,712 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 3.8550724637681157) internal successors, (266), 70 states have internal predecessors, (266), 0 states have call successors, (0), 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 [2022-07-23 05:40:27,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:40:27,712 INFO L225 Difference]: With dead ends: 138 [2022-07-23 05:40:27,712 INFO L226 Difference]: Without dead ends: 138 [2022-07-23 05:40:27,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2059 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1957, Invalid=8143, Unknown=0, NotChecked=0, Total=10100 [2022-07-23 05:40:27,713 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 456 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 1948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-23 05:40:27,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 1264 Invalid, 1948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1830 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-23 05:40:27,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-23 05:40:27,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2022-07-23 05:40:27,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0220588235294117) internal successors, (139), 136 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:27,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2022-07-23 05:40:27,715 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 131 [2022-07-23 05:40:27,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:40:27,715 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2022-07-23 05:40:27,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 3.8550724637681157) internal successors, (266), 70 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:27,716 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2022-07-23 05:40:27,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-23 05:40:27,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:40:27,716 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:40:27,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-07-23 05:40:27,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:40:27,919 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:40:27,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:40:27,920 INFO L85 PathProgramCache]: Analyzing trace with hash -929474227, now seen corresponding path program 27 times [2022-07-23 05:40:27,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:40:27,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064141350] [2022-07-23 05:40:27,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:40:27,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:40:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:40:28,495 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 28 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:28,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:40:28,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064141350] [2022-07-23 05:40:28,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064141350] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:40:28,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151748581] [2022-07-23 05:40:28,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:40:28,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:40:28,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:40:28,498 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) [2022-07-23 05:40:28,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-23 05:40:29,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-07-23 05:40:29,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:40:29,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-23 05:40:29,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:40:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 28 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:29,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:40:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 28 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:31,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151748581] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:40:31,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:40:31,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 68 [2022-07-23 05:40:31,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96851646] [2022-07-23 05:40:31,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:40:31,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-23 05:40:31,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:40:31,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-23 05:40:31,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=4376, Unknown=0, NotChecked=0, Total=4556 [2022-07-23 05:40:31,421 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand has 68 states, 68 states have (on average 4.0) internal successors, (272), 68 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:33,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:40:33,423 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2022-07-23 05:40:33,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-23 05:40:33,423 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 4.0) internal successors, (272), 68 states have internal predecessors, (272), 0 states have call successors, (0), 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 136 [2022-07-23 05:40:33,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:40:33,423 INFO L225 Difference]: With dead ends: 216 [2022-07-23 05:40:33,423 INFO L226 Difference]: Without dead ends: 144 [2022-07-23 05:40:33,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 236 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=403, Invalid=8909, Unknown=0, NotChecked=0, Total=9312 [2022-07-23 05:40:33,424 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 211 mSDsluCounter, 3231 mSDsCounter, 0 mSdLazyCounter, 2756 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 3307 SdHoareTripleChecker+Invalid, 2814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 2756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:40:33,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 3307 Invalid, 2814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 2756 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-23 05:40:33,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-23 05:40:33,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2022-07-23 05:40:33,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:33,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2022-07-23 05:40:33,427 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 136 [2022-07-23 05:40:33,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:40:33,428 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2022-07-23 05:40:33,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 4.0) internal successors, (272), 68 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:33,428 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2022-07-23 05:40:33,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-23 05:40:33,429 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:40:33,429 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:40:33,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-23 05:40:33,631 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,SelfDestructingSolverStorable36 [2022-07-23 05:40:33,631 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:40:33,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:40:33,632 INFO L85 PathProgramCache]: Analyzing trace with hash -693660054, now seen corresponding path program 28 times [2022-07-23 05:40:33,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:40:33,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905152243] [2022-07-23 05:40:33,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:40:33,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:40:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:40:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 325 proven. 593 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:34,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:40:34,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905152243] [2022-07-23 05:40:34,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905152243] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:40:34,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180066867] [2022-07-23 05:40:34,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:40:34,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:40:34,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:40:34,364 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) [2022-07-23 05:40:34,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-23 05:40:34,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:40:34,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:40:34,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 148 conjunts are in the unsatisfiable core [2022-07-23 05:40:34,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:40:34,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 05:40:36,021 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 378 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:36,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:40:37,748 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 435 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:37,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180066867] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:40:37,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:40:37,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 103 [2022-07-23 05:40:37,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138072079] [2022-07-23 05:40:37,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:40:37,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-07-23 05:40:37,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:40:37,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-07-23 05:40:37,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1182, Invalid=9530, Unknown=0, NotChecked=0, Total=10712 [2022-07-23 05:40:37,751 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand has 104 states, 103 states have (on average 4.0) internal successors, (412), 104 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:39,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:40:39,503 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2022-07-23 05:40:39,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-23 05:40:39,504 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 103 states have (on average 4.0) internal successors, (412), 104 states have internal predecessors, (412), 0 states have call successors, (0), 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 140 [2022-07-23 05:40:39,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:40:39,504 INFO L225 Difference]: With dead ends: 147 [2022-07-23 05:40:39,504 INFO L226 Difference]: Without dead ends: 147 [2022-07-23 05:40:39,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5246 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3293, Invalid=15339, Unknown=0, NotChecked=0, Total=18632 [2022-07-23 05:40:39,506 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 489 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 2331 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 2456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 05:40:39,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 1653 Invalid, 2456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2331 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-23 05:40:39,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-07-23 05:40:39,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2022-07-23 05:40:39,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0206896551724138) internal successors, (148), 145 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) [2022-07-23 05:40:39,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2022-07-23 05:40:39,509 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 140 [2022-07-23 05:40:39,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:40:39,509 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2022-07-23 05:40:39,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 103 states have (on average 4.0) internal successors, (412), 104 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:39,510 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2022-07-23 05:40:39,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-07-23 05:40:39,510 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:40:39,510 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:40:39,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-07-23 05:40:39,723 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,SelfDestructingSolverStorable37 [2022-07-23 05:40:39,723 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:40:39,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:40:39,724 INFO L85 PathProgramCache]: Analyzing trace with hash -455466800, now seen corresponding path program 29 times [2022-07-23 05:40:39,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:40:39,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032599581] [2022-07-23 05:40:39,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:40:39,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:40:39,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:40:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 30 proven. 960 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:40,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:40:40,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032599581] [2022-07-23 05:40:40,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032599581] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:40:40,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701760526] [2022-07-23 05:40:40,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:40:40,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:40:40,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:40:40,443 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) [2022-07-23 05:40:40,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-23 05:40:42,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-07-23 05:40:42,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:40:42,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 196 conjunts are in the unsatisfiable core [2022-07-23 05:40:42,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:40:42,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 05:40:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 378 proven. 612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:44,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:40:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 435 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:40:50,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701760526] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:40:50,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:40:50,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 51, 51] total 136 [2022-07-23 05:40:50,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808888545] [2022-07-23 05:40:50,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:40:50,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-07-23 05:40:50,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:40:50,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-07-23 05:40:50,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1196, Invalid=17164, Unknown=0, NotChecked=0, Total=18360 [2022-07-23 05:40:50,216 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand has 136 states, 136 states have (on average 3.139705882352941) internal successors, (427), 136 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:59,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:40:59,982 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2022-07-23 05:40:59,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-07-23 05:40:59,983 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 3.139705882352941) internal successors, (427), 136 states have internal predecessors, (427), 0 states have call successors, (0), 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 145 [2022-07-23 05:40:59,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:40:59,984 INFO L225 Difference]: With dead ends: 236 [2022-07-23 05:40:59,984 INFO L226 Difference]: Without dead ends: 159 [2022-07-23 05:40:59,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9131 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=7066, Invalid=56186, Unknown=0, NotChecked=0, Total=63252 [2022-07-23 05:40:59,987 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 1195 mSDsluCounter, 3199 mSDsCounter, 0 mSdLazyCounter, 6550 mSolverCounterSat, 795 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1195 SdHoareTripleChecker+Valid, 3250 SdHoareTripleChecker+Invalid, 7345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 795 IncrementalHoareTripleChecker+Valid, 6550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-23 05:40:59,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1195 Valid, 3250 Invalid, 7345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [795 Valid, 6550 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-23 05:40:59,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-23 05:40:59,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2022-07-23 05:40:59,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0194805194805194) internal successors, (157), 154 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:59,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2022-07-23 05:40:59,990 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 145 [2022-07-23 05:40:59,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:40:59,990 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2022-07-23 05:40:59,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 3.139705882352941) internal successors, (427), 136 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:40:59,991 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2022-07-23 05:40:59,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-07-23 05:40:59,991 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:40:59,992 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:41:00,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-23 05:41:00,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-23 05:41:00,200 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:41:00,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:41:00,200 INFO L85 PathProgramCache]: Analyzing trace with hash -461984633, now seen corresponding path program 30 times [2022-07-23 05:41:00,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:41:00,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631734772] [2022-07-23 05:41:00,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:41:00,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:41:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:41:00,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 32 proven. 1096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:41:00,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:41:00,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631734772] [2022-07-23 05:41:00,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631734772] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:41:00,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565832402] [2022-07-23 05:41:00,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:41:00,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:41:00,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:41:00,913 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) [2022-07-23 05:41:00,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-23 05:41:02,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-07-23 05:41:02,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:41:02,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-23 05:41:02,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:41:02,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 05:41:03,708 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 13 treesize of output 9 [2022-07-23 05:41:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 32 proven. 1096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:41:03,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:41:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 32 proven. 1096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:41:06,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565832402] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:41:06,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:41:06,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 92 [2022-07-23 05:41:06,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7911772] [2022-07-23 05:41:06,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:41:06,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-07-23 05:41:06,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:41:06,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-07-23 05:41:06,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=8090, Unknown=0, NotChecked=0, Total=8372 [2022-07-23 05:41:06,187 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand has 92 states, 92 states have (on average 4.010869565217392) internal successors, (369), 92 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:41:08,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:41:08,896 INFO L93 Difference]: Finished difference Result 244 states and 246 transitions. [2022-07-23 05:41:08,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-23 05:41:08,897 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 4.010869565217392) internal successors, (369), 92 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2022-07-23 05:41:08,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:41:08,897 INFO L225 Difference]: With dead ends: 244 [2022-07-23 05:41:08,897 INFO L226 Difference]: Without dead ends: 162 [2022-07-23 05:41:08,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2639 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=848, Invalid=14902, Unknown=0, NotChecked=0, Total=15750 [2022-07-23 05:41:08,898 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 435 mSDsluCounter, 4151 mSDsCounter, 0 mSdLazyCounter, 4128 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 4237 SdHoareTripleChecker+Invalid, 4259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 4128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:41:08,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 4237 Invalid, 4259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 4128 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-23 05:41:08,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-07-23 05:41:08,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2022-07-23 05:41:08,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.018987341772152) internal successors, (161), 158 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:41:08,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2022-07-23 05:41:08,901 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 154 [2022-07-23 05:41:08,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:41:08,901 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2022-07-23 05:41:08,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 4.010869565217392) internal successors, (369), 92 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:41:08,902 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2022-07-23 05:41:08,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-07-23 05:41:08,902 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:41:08,903 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:41:08,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-07-23 05:41:09,107 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,SelfDestructingSolverStorable39 [2022-07-23 05:41:09,107 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:41:09,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:41:09,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1331905436, now seen corresponding path program 31 times [2022-07-23 05:41:09,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:41:09,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260234520] [2022-07-23 05:41:09,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:41:09,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:41:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:41:09,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 435 proven. 758 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:41:09,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:41:09,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260234520] [2022-07-23 05:41:09,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260234520] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:41:09,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012045266] [2022-07-23 05:41:09,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:41:09,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:41:09,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:41:09,879 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) [2022-07-23 05:41:09,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-23 05:41:10,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:41:10,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 162 conjunts are in the unsatisfiable core [2022-07-23 05:41:10,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:41:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 512 proven. 681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:41:10,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:41:11,887 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 [2022-07-23 05:41:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 512 proven. 681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:41:11,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012045266] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:41:11,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:41:11,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 81 [2022-07-23 05:41:11,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173470671] [2022-07-23 05:41:11,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:41:11,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-07-23 05:41:11,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:41:11,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-07-23 05:41:11,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=602, Invalid=6040, Unknown=0, NotChecked=0, Total=6642 [2022-07-23 05:41:11,948 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand has 82 states, 81 states have (on average 3.950617283950617) internal successors, (320), 82 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:41:14,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:41:14,698 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2022-07-23 05:41:14,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-23 05:41:14,699 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 3.950617283950617) internal successors, (320), 82 states have internal predecessors, (320), 0 states have call successors, (0), 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 158 [2022-07-23 05:41:14,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:41:14,700 INFO L225 Difference]: With dead ends: 165 [2022-07-23 05:41:14,700 INFO L226 Difference]: Without dead ends: 165 [2022-07-23 05:41:14,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2490 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3599, Invalid=14491, Unknown=0, NotChecked=0, Total=18090 [2022-07-23 05:41:14,701 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 547 mSDsluCounter, 1724 mSDsCounter, 0 mSdLazyCounter, 2635 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 1796 SdHoareTripleChecker+Invalid, 2780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 2635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-23 05:41:14,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 1796 Invalid, 2780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 2635 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-23 05:41:14,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-23 05:41:14,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2022-07-23 05:41:14,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.01840490797546) internal successors, (166), 163 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:41:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2022-07-23 05:41:14,704 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 158 [2022-07-23 05:41:14,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:41:14,705 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2022-07-23 05:41:14,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 3.950617283950617) internal successors, (320), 82 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:41:14,705 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2022-07-23 05:41:14,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-23 05:41:14,706 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:41:14,706 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:41:14,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-23 05:41:14,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:41:14,919 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:41:14,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:41:14,920 INFO L85 PathProgramCache]: Analyzing trace with hash -907041002, now seen corresponding path program 32 times [2022-07-23 05:41:14,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:41:14,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304064310] [2022-07-23 05:41:14,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:41:14,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:41:15,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:41:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 34 proven. 1241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:41:15,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:41:15,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304064310] [2022-07-23 05:41:15,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304064310] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:41:15,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801876187] [2022-07-23 05:41:15,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:41:15,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:41:15,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:41:15,693 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) [2022-07-23 05:41:15,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-23 05:41:16,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:41:16,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:41:16,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-23 05:41:16,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:41:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 34 proven. 1241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:41:16,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:41:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 34 proven. 1241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:41:18,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801876187] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:41:18,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:41:18,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 80 [2022-07-23 05:41:18,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726222423] [2022-07-23 05:41:18,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:41:18,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-23 05:41:18,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:41:18,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-23 05:41:18,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=6110, Unknown=0, NotChecked=0, Total=6320 [2022-07-23 05:41:18,572 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand has 80 states, 80 states have (on average 4.075) internal successors, (326), 80 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:41:21,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:41:21,403 INFO L93 Difference]: Finished difference Result 258 states and 260 transitions. [2022-07-23 05:41:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-23 05:41:21,403 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 4.075) internal successors, (326), 80 states have internal predecessors, (326), 0 states have call successors, (0), 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 163 [2022-07-23 05:41:21,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:41:21,404 INFO L225 Difference]: With dead ends: 258 [2022-07-23 05:41:21,404 INFO L226 Difference]: Without dead ends: 171 [2022-07-23 05:41:21,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 284 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1505 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=478, Invalid=12632, Unknown=0, NotChecked=0, Total=13110 [2022-07-23 05:41:21,405 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 190 mSDsluCounter, 4597 mSDsCounter, 0 mSdLazyCounter, 3881 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 4688 SdHoareTripleChecker+Invalid, 3935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 3881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:41:21,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 4688 Invalid, 3935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 3881 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-23 05:41:21,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-23 05:41:21,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2022-07-23 05:41:21,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0179640718562875) internal successors, (170), 167 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) [2022-07-23 05:41:21,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2022-07-23 05:41:21,408 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 163 [2022-07-23 05:41:21,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:41:21,408 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2022-07-23 05:41:21,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 4.075) internal successors, (326), 80 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:41:21,408 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2022-07-23 05:41:21,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-07-23 05:41:21,409 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:41:21,409 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:41:21,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-23 05:41:21,609 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,SelfDestructingSolverStorable41 [2022-07-23 05:41:21,610 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:41:21,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:41:21,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2039554009, now seen corresponding path program 33 times [2022-07-23 05:41:21,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:41:21,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9778566] [2022-07-23 05:41:21,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:41:21,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:41:21,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:41:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 496 proven. 848 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:41:22,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:41:22,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9778566] [2022-07-23 05:41:22,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9778566] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:41:22,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5395498] [2022-07-23 05:41:22,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:41:22,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:41:22,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:41:22,447 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) [2022-07-23 05:41:22,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-23 05:41:23,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-07-23 05:41:23,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:41:24,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 230 conjunts are in the unsatisfiable core [2022-07-23 05:41:24,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:41:24,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 05:41:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 69 proven. 714 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-07-23 05:41:26,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:41:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1284 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-23 05:41:32,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5395498] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:41:32,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:41:32,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 43, 55] total 137 [2022-07-23 05:41:32,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324652011] [2022-07-23 05:41:32,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:41:32,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-07-23 05:41:32,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:41:32,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-07-23 05:41:32,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1786, Invalid=17120, Unknown=0, NotChecked=0, Total=18906 [2022-07-23 05:41:32,439 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand has 138 states, 137 states have (on average 2.9927007299270074) internal successors, (410), 138 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:42:02,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:42:02,468 INFO L93 Difference]: Finished difference Result 258 states and 260 transitions. [2022-07-23 05:42:02,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-07-23 05:42:02,468 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 137 states have (on average 2.9927007299270074) internal successors, (410), 138 states have internal predecessors, (410), 0 states have call successors, (0), 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 167 [2022-07-23 05:42:02,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:42:02,469 INFO L225 Difference]: With dead ends: 258 [2022-07-23 05:42:02,469 INFO L226 Difference]: Without dead ends: 258 [2022-07-23 05:42:02,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14950 ImplicationChecksByTransitivity, 34.6s TimeCoverageRelationStatistics Valid=16160, Invalid=72942, Unknown=0, NotChecked=0, Total=89102 [2022-07-23 05:42:02,473 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 1252 mSDsluCounter, 2561 mSDsCounter, 0 mSdLazyCounter, 5492 mSolverCounterSat, 1083 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 2619 SdHoareTripleChecker+Invalid, 6575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1083 IncrementalHoareTripleChecker+Valid, 5492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-23 05:42:02,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1252 Valid, 2619 Invalid, 6575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1083 Valid, 5492 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-23 05:42:02,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-07-23 05:42:02,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2022-07-23 05:42:02,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 1.0116731517509727) internal successors, (260), 257 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) [2022-07-23 05:42:02,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 260 transitions. [2022-07-23 05:42:02,477 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 260 transitions. Word has length 167 [2022-07-23 05:42:02,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:42:02,477 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 260 transitions. [2022-07-23 05:42:02,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 137 states have (on average 2.9927007299270074) internal successors, (410), 138 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:42:02,477 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 260 transitions. [2022-07-23 05:42:02,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-07-23 05:42:02,478 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:42:02,478 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 35, 35, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:42:02,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-07-23 05:42:02,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:42:02,686 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:42:02,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:42:02,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1287554855, now seen corresponding path program 34 times [2022-07-23 05:42:02,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:42:02,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550265911] [2022-07-23 05:42:02,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:42:02,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:42:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:42:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 2312 proven. 683 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2022-07-23 05:42:03,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:42:03,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550265911] [2022-07-23 05:42:03,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550265911] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:42:03,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626096486] [2022-07-23 05:42:03,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:42:03,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:42:03,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:42:03,556 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) [2022-07-23 05:42:03,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-23 05:42:03,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:42:03,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:42:03,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 142 conjunts are in the unsatisfiable core [2022-07-23 05:42:03,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:42:03,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 05:42:05,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 2330 proven. 665 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2022-07-23 05:42:05,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:42:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 2329 proven. 666 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2022-07-23 05:42:07,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626096486] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:42:07,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:42:07,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 106 [2022-07-23 05:42:07,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79951156] [2022-07-23 05:42:07,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:42:07,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-07-23 05:42:07,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:42:07,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-07-23 05:42:07,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1869, Invalid=9261, Unknown=0, NotChecked=0, Total=11130 [2022-07-23 05:42:07,023 INFO L87 Difference]: Start difference. First operand 258 states and 260 transitions. Second operand has 106 states, 106 states have (on average 3.981132075471698) internal successors, (422), 106 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:42:08,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:42:08,752 INFO L93 Difference]: Finished difference Result 359 states and 361 transitions. [2022-07-23 05:42:08,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-23 05:42:08,753 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 3.981132075471698) internal successors, (422), 106 states have internal predecessors, (422), 0 states have call successors, (0), 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 257 [2022-07-23 05:42:08,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:42:08,754 INFO L225 Difference]: With dead ends: 359 [2022-07-23 05:42:08,754 INFO L226 Difference]: Without dead ends: 265 [2022-07-23 05:42:08,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 451 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4687 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4337, Invalid=16833, Unknown=0, NotChecked=0, Total=21170 [2022-07-23 05:42:08,756 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 109 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:42:08,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 982 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:42:08,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-07-23 05:42:08,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2022-07-23 05:42:08,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.0114942528735633) internal successors, (264), 261 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:42:08,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 264 transitions. [2022-07-23 05:42:08,760 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 264 transitions. Word has length 257 [2022-07-23 05:42:08,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:42:08,760 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 264 transitions. [2022-07-23 05:42:08,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 3.981132075471698) internal successors, (422), 106 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:42:08,760 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 264 transitions. [2022-07-23 05:42:08,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-07-23 05:42:08,761 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:42:08,762 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 35, 35, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:42:08,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-07-23 05:42:08,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:42:08,983 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-23 05:42:08,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:42:08,984 INFO L85 PathProgramCache]: Analyzing trace with hash 650371676, now seen corresponding path program 35 times [2022-07-23 05:42:08,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:42:08,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276991334] [2022-07-23 05:42:08,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:42:08,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:42:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:42:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3748 backedges. 2389 proven. 759 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2022-07-23 05:42:09,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:42:09,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276991334] [2022-07-23 05:42:09,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276991334] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:42:09,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370860630] [2022-07-23 05:42:09,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:42:09,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:42:09,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:42:09,908 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) [2022-07-23 05:42:09,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process