./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version eb692b52 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_cstrlcpy-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a775ba6b744ab5ffb556747687a592ac2a696b9fe34bb3e21dc1471ba5c99e1a --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 05:24:27,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 05:24:27,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 05:24:27,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 05:24:27,600 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 05:24:27,601 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 05:24:27,602 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 05:24:27,605 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 05:24:27,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 05:24:27,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 05:24:27,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 05:24:27,613 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 05:24:27,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 05:24:27,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 05:24:27,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 05:24:27,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 05:24:27,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 05:24:27,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 05:24:27,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 05:24:27,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 05:24:27,631 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 05:24:27,632 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 05:24:27,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 05:24:27,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 05:24:27,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 05:24:27,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 05:24:27,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 05:24:27,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 05:24:27,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 05:24:27,640 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 05:24:27,641 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 05:24:27,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 05:24:27,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 05:24:27,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 05:24:27,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 05:24:27,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 05:24:27,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 05:24:27,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 05:24:27,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 05:24:27,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 05:24:27,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 05:24:27,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 05:24:27,649 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 05:24:27,681 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 05:24:27,681 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 05:24:27,682 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 05:24:27,682 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 05:24:27,682 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 05:24:27,683 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 05:24:27,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 05:24:27,683 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 05:24:27,684 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 05:24:27,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 05:24:27,685 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 05:24:27,685 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 05:24:27,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 05:24:27,685 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 05:24:27,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 05:24:27,685 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 05:24:27,686 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 05:24:27,686 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 05:24:27,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 05:24:27,686 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 05:24:27,686 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 05:24:27,687 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 05:24:27,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 05:24:27,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 05:24:27,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 05:24:27,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:24:27,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 05:24:27,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 05:24:27,689 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 05:24:27,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 05:24:27,689 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a775ba6b744ab5ffb556747687a592ac2a696b9fe34bb3e21dc1471ba5c99e1a [2022-07-20 05:24:27,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 05:24:27,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 05:24:27,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 05:24:27,939 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 05:24:27,940 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 05:24:27,941 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i [2022-07-20 05:24:27,998 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bde084c36/546295cba1a9487291f2abb57511ac77/FLAG545258b96 [2022-07-20 05:24:28,404 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 05:24:28,404 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i [2022-07-20 05:24:28,429 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bde084c36/546295cba1a9487291f2abb57511ac77/FLAG545258b96 [2022-07-20 05:24:28,438 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bde084c36/546295cba1a9487291f2abb57511ac77 [2022-07-20 05:24:28,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 05:24:28,442 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 05:24:28,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 05:24:28,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 05:24:28,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 05:24:28,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:24:28" (1/1) ... [2022-07-20 05:24:28,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c2edf25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:24:28, skipping insertion in model container [2022-07-20 05:24:28,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:24:28" (1/1) ... [2022-07-20 05:24:28,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 05:24:28,492 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 05:24:28,715 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:24:28,722 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 05:24:28,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:24:28,804 INFO L208 MainTranslator]: Completed translation [2022-07-20 05:24:28,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:24:28 WrapperNode [2022-07-20 05:24:28,804 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 05:24:28,806 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 05:24:28,806 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 05:24:28,807 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 05:24:28,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:24:28" (1/1) ... [2022-07-20 05:24:28,839 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:24:28" (1/1) ... [2022-07-20 05:24:28,869 INFO L137 Inliner]: procedures = 117, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 100 [2022-07-20 05:24:28,869 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 05:24:28,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 05:24:28,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 05:24:28,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 05:24:28,878 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:24:28" (1/1) ... [2022-07-20 05:24:28,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:24:28" (1/1) ... [2022-07-20 05:24:28,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:24:28" (1/1) ... [2022-07-20 05:24:28,881 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:24:28" (1/1) ... [2022-07-20 05:24:28,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:24:28" (1/1) ... [2022-07-20 05:24:28,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:24:28" (1/1) ... [2022-07-20 05:24:28,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:24:28" (1/1) ... [2022-07-20 05:24:28,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 05:24:28,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 05:24:28,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 05:24:28,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 05:24:28,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:24:28" (1/1) ... [2022-07-20 05:24:28,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:24:28,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:24:28,943 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) [2022-07-20 05:24:28,947 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 [2022-07-20 05:24:28,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 05:24:28,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 05:24:28,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 05:24:28,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 05:24:28,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 05:24:28,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 05:24:29,092 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 05:24:29,094 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 05:24:29,295 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 05:24:29,302 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 05:24:29,302 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-20 05:24:29,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:24:29 BoogieIcfgContainer [2022-07-20 05:24:29,304 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 05:24:29,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 05:24:29,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 05:24:29,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 05:24:29,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:24:28" (1/3) ... [2022-07-20 05:24:29,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39ebfe4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:24:29, skipping insertion in model container [2022-07-20 05:24:29,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:24:28" (2/3) ... [2022-07-20 05:24:29,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39ebfe4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:24:29, skipping insertion in model container [2022-07-20 05:24:29,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:24:29" (3/3) ... [2022-07-20 05:24:29,312 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlcpy-alloca-1.i [2022-07-20 05:24:29,326 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 05:24:29,326 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2022-07-20 05:24:29,384 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 05:24:29,392 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@68a4b41d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55220737 [2022-07-20 05:24:29,392 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2022-07-20 05:24:29,397 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 50 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:29,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 05:24:29,417 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:29,418 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:29,418 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:29,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:29,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-07-20 05:24:29,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:29,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644783221] [2022-07-20 05:24:29,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:29,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:29,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:29,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644783221] [2022-07-20 05:24:29,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644783221] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:29,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:29,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:24:29,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123672153] [2022-07-20 05:24:29,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:29,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:24:29,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:29,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:24:29,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:24:29,706 INFO L87 Difference]: Start difference. First operand has 51 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 50 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:29,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:29,777 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2022-07-20 05:24:29,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:24:29,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-20 05:24:29,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:29,790 INFO L225 Difference]: With dead ends: 94 [2022-07-20 05:24:29,790 INFO L226 Difference]: Without dead ends: 90 [2022-07-20 05:24:29,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:24:29,796 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 49 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:29,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 157 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:24:29,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-20 05:24:29,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 52. [2022-07-20 05:24:29,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 51 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) [2022-07-20 05:24:29,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2022-07-20 05:24:29,832 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 7 [2022-07-20 05:24:29,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:29,833 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2022-07-20 05:24:29,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:29,833 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2022-07-20 05:24:29,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 05:24:29,834 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:29,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:29,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 05:24:29,835 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:29,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:29,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2022-07-20 05:24:29,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:29,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102035857] [2022-07-20 05:24:29,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:29,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:29,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:29,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:29,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102035857] [2022-07-20 05:24:29,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102035857] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:29,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:29,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:24:29,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035095172] [2022-07-20 05:24:29,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:29,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:24:29,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:29,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:24:29,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:24:29,933 INFO L87 Difference]: Start difference. First operand 52 states and 62 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) [2022-07-20 05:24:30,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:30,047 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2022-07-20 05:24:30,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:24:30,047 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 [2022-07-20 05:24:30,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:30,051 INFO L225 Difference]: With dead ends: 95 [2022-07-20 05:24:30,052 INFO L226 Difference]: Without dead ends: 95 [2022-07-20 05:24:30,055 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 [2022-07-20 05:24:30,056 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 141 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:30,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 69 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:24:30,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-20 05:24:30,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 50. [2022-07-20 05:24:30,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:30,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-07-20 05:24:30,065 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 7 [2022-07-20 05:24:30,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:30,065 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-07-20 05:24:30,066 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) [2022-07-20 05:24:30,067 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-07-20 05:24:30,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 05:24:30,067 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:30,067 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:30,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 05:24:30,068 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:30,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:30,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-07-20 05:24:30,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:30,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148029470] [2022-07-20 05:24:30,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:30,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:30,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:30,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148029470] [2022-07-20 05:24:30,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148029470] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:30,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:30,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:24:30,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049351007] [2022-07-20 05:24:30,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:30,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:24:30,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:30,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:24:30,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:24:30,158 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:30,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:30,210 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2022-07-20 05:24:30,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:24:30,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-20 05:24:30,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:30,212 INFO L225 Difference]: With dead ends: 90 [2022-07-20 05:24:30,212 INFO L226 Difference]: Without dead ends: 90 [2022-07-20 05:24:30,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:24:30,213 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 188 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:30,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 71 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:24:30,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-20 05:24:30,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 59. [2022-07-20 05:24:30,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 58 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:30,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2022-07-20 05:24:30,234 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 7 [2022-07-20 05:24:30,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:30,234 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2022-07-20 05:24:30,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:30,234 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2022-07-20 05:24:30,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-20 05:24:30,235 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:30,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:30,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 05:24:30,236 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:30,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:30,237 INFO L85 PathProgramCache]: Analyzing trace with hash -533876961, now seen corresponding path program 1 times [2022-07-20 05:24:30,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:30,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909086613] [2022-07-20 05:24:30,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:30,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:30,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:30,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909086613] [2022-07-20 05:24:30,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909086613] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:30,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:30,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:24:30,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261507414] [2022-07-20 05:24:30,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:30,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:24:30,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:30,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:24:30,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:24:30,270 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:30,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:30,305 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2022-07-20 05:24:30,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:24:30,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-20 05:24:30,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:30,306 INFO L225 Difference]: With dead ends: 57 [2022-07-20 05:24:30,306 INFO L226 Difference]: Without dead ends: 57 [2022-07-20 05:24:30,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:24:30,308 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:30,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 42 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:24:30,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-20 05:24:30,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-20 05:24:30,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 56 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) [2022-07-20 05:24:30,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2022-07-20 05:24:30,318 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 9 [2022-07-20 05:24:30,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:30,319 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2022-07-20 05:24:30,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:30,319 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2022-07-20 05:24:30,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-20 05:24:30,320 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:30,327 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:30,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 05:24:30,327 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:30,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:30,328 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2022-07-20 05:24:30,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:30,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054787678] [2022-07-20 05:24:30,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:30,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:30,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:30,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:30,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054787678] [2022-07-20 05:24:30,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054787678] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:30,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:30,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:24:30,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443791118] [2022-07-20 05:24:30,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:30,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:24:30,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:30,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:24:30,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:24:30,378 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:30,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:30,406 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2022-07-20 05:24:30,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:24:30,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-20 05:24:30,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:30,408 INFO L225 Difference]: With dead ends: 56 [2022-07-20 05:24:30,408 INFO L226 Difference]: Without dead ends: 56 [2022-07-20 05:24:30,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:24:30,411 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 47 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:30,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:24:30,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-20 05:24:30,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-07-20 05:24:30,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 55 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:30,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2022-07-20 05:24:30,418 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 9 [2022-07-20 05:24:30,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:30,418 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2022-07-20 05:24:30,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:30,418 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2022-07-20 05:24:30,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-20 05:24:30,419 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:30,419 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:30,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 05:24:30,419 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:30,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:30,420 INFO L85 PathProgramCache]: Analyzing trace with hash -533876907, now seen corresponding path program 1 times [2022-07-20 05:24:30,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:30,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313470260] [2022-07-20 05:24:30,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:30,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:30,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:30,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:30,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:30,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313470260] [2022-07-20 05:24:30,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313470260] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:30,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:30,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:24:30,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157682612] [2022-07-20 05:24:30,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:30,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:24:30,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:30,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:24:30,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:24:30,478 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:30,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:30,493 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2022-07-20 05:24:30,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:24:30,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-20 05:24:30,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:30,495 INFO L225 Difference]: With dead ends: 100 [2022-07-20 05:24:30,495 INFO L226 Difference]: Without dead ends: 100 [2022-07-20 05:24:30,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:24:30,498 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 74 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:30,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 100 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:24:30,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-20 05:24:30,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 69. [2022-07-20 05:24:30,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.4912280701754386) internal successors, (85), 68 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) [2022-07-20 05:24:30,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2022-07-20 05:24:30,509 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 9 [2022-07-20 05:24:30,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:30,510 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2022-07-20 05:24:30,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:30,512 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2022-07-20 05:24:30,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-20 05:24:30,512 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:30,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:30,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 05:24:30,513 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:30,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:30,514 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2022-07-20 05:24:30,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:30,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604784737] [2022-07-20 05:24:30,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:30,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:30,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:30,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604784737] [2022-07-20 05:24:30,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604784737] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:30,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:30,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 05:24:30,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134706314] [2022-07-20 05:24:30,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:30,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:24:30,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:30,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:24:30,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:24:30,678 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:30,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:30,817 INFO L93 Difference]: Finished difference Result 107 states and 130 transitions. [2022-07-20 05:24:30,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:24:30,817 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-20 05:24:30,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:30,818 INFO L225 Difference]: With dead ends: 107 [2022-07-20 05:24:30,818 INFO L226 Difference]: Without dead ends: 107 [2022-07-20 05:24:30,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:24:30,819 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 321 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:30,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 59 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:24:30,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-20 05:24:30,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 73. [2022-07-20 05:24:30,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 72 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:30,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 91 transitions. [2022-07-20 05:24:30,823 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 91 transitions. Word has length 9 [2022-07-20 05:24:30,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:30,824 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 91 transitions. [2022-07-20 05:24:30,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:30,824 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 91 transitions. [2022-07-20 05:24:30,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 05:24:30,825 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:30,825 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:30,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 05:24:30,825 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:30,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:30,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-07-20 05:24:30,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:30,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465691834] [2022-07-20 05:24:30,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:30,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:30,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:30,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:30,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:30,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465691834] [2022-07-20 05:24:30,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465691834] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:24:30,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511068721] [2022-07-20 05:24:30,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:30,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:24:30,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:24:30,888 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) [2022-07-20 05:24:30,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 05:24:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:30,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 05:24:30,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:24:31,072 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:24:31,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:24:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:31,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:24:31,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:31,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511068721] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:24:31,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:24:31,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-20 05:24:31,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080188272] [2022-07-20 05:24:31,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:24:31,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 05:24:31,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:31,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 05:24:31,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:24:31,330 INFO L87 Difference]: Start difference. First operand 73 states and 91 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) [2022-07-20 05:24:31,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:31,549 INFO L93 Difference]: Finished difference Result 142 states and 172 transitions. [2022-07-20 05:24:31,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:24:31,554 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 [2022-07-20 05:24:31,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:31,555 INFO L225 Difference]: With dead ends: 142 [2022-07-20 05:24:31,555 INFO L226 Difference]: Without dead ends: 142 [2022-07-20 05:24:31,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-07-20 05:24:31,556 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 201 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:31,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 299 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:24:31,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-20 05:24:31,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 70. [2022-07-20 05:24:31,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 59 states have (on average 1.4745762711864407) internal successors, (87), 69 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:31,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2022-07-20 05:24:31,560 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 11 [2022-07-20 05:24:31,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:31,560 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2022-07-20 05:24:31,560 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) [2022-07-20 05:24:31,560 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2022-07-20 05:24:31,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 05:24:31,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:31,561 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:31,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 05:24:31,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:24:31,780 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:31,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:31,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2022-07-20 05:24:31,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:31,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612936043] [2022-07-20 05:24:31,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:31,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:31,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:31,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612936043] [2022-07-20 05:24:31,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612936043] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:24:31,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226856545] [2022-07-20 05:24:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:31,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:24:31,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:24:31,847 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) [2022-07-20 05:24:31,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 05:24:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:31,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 05:24:31,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:24:31,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:24:31,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:24:31,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:24:31,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:31,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:24:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:32,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226856545] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:24:32,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:24:32,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-20 05:24:32,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277251419] [2022-07-20 05:24:32,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:24:32,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 05:24:32,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:32,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 05:24:32,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:24:32,167 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:32,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:32,334 INFO L93 Difference]: Finished difference Result 135 states and 163 transitions. [2022-07-20 05:24:32,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 05:24:32,334 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-20 05:24:32,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:32,335 INFO L225 Difference]: With dead ends: 135 [2022-07-20 05:24:32,335 INFO L226 Difference]: Without dead ends: 135 [2022-07-20 05:24:32,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:24:32,336 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 224 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:32,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 262 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:24:32,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-20 05:24:32,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 65. [2022-07-20 05:24:32,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 64 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:32,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2022-07-20 05:24:32,340 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 13 [2022-07-20 05:24:32,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:32,340 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2022-07-20 05:24:32,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:32,340 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2022-07-20 05:24:32,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-20 05:24:32,341 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:32,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:32,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 05:24:32,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-20 05:24:32,568 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:32,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:32,568 INFO L85 PathProgramCache]: Analyzing trace with hash -115553675, now seen corresponding path program 1 times [2022-07-20 05:24:32,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:32,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107504706] [2022-07-20 05:24:32,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:32,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:24:32,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:32,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107504706] [2022-07-20 05:24:32,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107504706] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:32,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:32,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:24:32,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910266337] [2022-07-20 05:24:32,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:32,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:24:32,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:32,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:24:32,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:24:32,615 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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) [2022-07-20 05:24:32,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:32,634 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2022-07-20 05:24:32,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:24:32,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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 [2022-07-20 05:24:32,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:32,635 INFO L225 Difference]: With dead ends: 64 [2022-07-20 05:24:32,635 INFO L226 Difference]: Without dead ends: 64 [2022-07-20 05:24:32,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:24:32,636 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:32,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 38 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:24:32,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-20 05:24:32,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 53. [2022-07-20 05:24:32,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 52 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:32,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2022-07-20 05:24:32,641 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 14 [2022-07-20 05:24:32,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:32,641 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2022-07-20 05:24:32,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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) [2022-07-20 05:24:32,641 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2022-07-20 05:24:32,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-20 05:24:32,644 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:32,644 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:32,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 05:24:32,644 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:32,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:32,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1062912840, now seen corresponding path program 1 times [2022-07-20 05:24:32,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:32,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461327651] [2022-07-20 05:24:32,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:32,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:32,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:32,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461327651] [2022-07-20 05:24:32,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461327651] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:32,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:32,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:24:32,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466918650] [2022-07-20 05:24:32,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:32,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 05:24:32,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:32,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 05:24:32,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:24:32,729 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 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) [2022-07-20 05:24:32,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:32,774 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2022-07-20 05:24:32,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:24:32,775 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 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 [2022-07-20 05:24:32,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:32,776 INFO L225 Difference]: With dead ends: 68 [2022-07-20 05:24:32,776 INFO L226 Difference]: Without dead ends: 68 [2022-07-20 05:24:32,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:24:32,777 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 135 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:32,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 73 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:24:32,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-20 05:24:32,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2022-07-20 05:24:32,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.489795918367347) internal successors, (73), 57 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:32,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2022-07-20 05:24:32,783 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 15 [2022-07-20 05:24:32,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:32,783 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2022-07-20 05:24:32,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 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) [2022-07-20 05:24:32,784 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2022-07-20 05:24:32,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-20 05:24:32,785 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:32,785 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:32,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-20 05:24:32,785 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:32,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:32,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1062912839, now seen corresponding path program 1 times [2022-07-20 05:24:32,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:32,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631382042] [2022-07-20 05:24:32,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:32,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:32,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:32,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631382042] [2022-07-20 05:24:32,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631382042] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:32,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:32,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:24:32,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107885739] [2022-07-20 05:24:32,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:32,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:24:32,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:32,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:24:32,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:24:32,825 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 4 states, 3 states have (on average 5.0) 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) [2022-07-20 05:24:32,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:32,857 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2022-07-20 05:24:32,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:24:32,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) 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 [2022-07-20 05:24:32,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:32,859 INFO L225 Difference]: With dead ends: 57 [2022-07-20 05:24:32,859 INFO L226 Difference]: Without dead ends: 57 [2022-07-20 05:24:32,859 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 [2022-07-20 05:24:32,860 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 59 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:32,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 51 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:24:32,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-20 05:24:32,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-20 05:24:32,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 56 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) [2022-07-20 05:24:32,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2022-07-20 05:24:32,869 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 15 [2022-07-20 05:24:32,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:32,869 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2022-07-20 05:24:32,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) 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) [2022-07-20 05:24:32,869 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2022-07-20 05:24:32,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-20 05:24:32,871 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:32,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:32,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 05:24:32,872 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:32,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:32,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1062113512, now seen corresponding path program 1 times [2022-07-20 05:24:32,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:32,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323579640] [2022-07-20 05:24:32,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:32,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:32,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:32,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:32,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:32,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323579640] [2022-07-20 05:24:32,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323579640] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:32,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:32,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:24:32,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234761682] [2022-07-20 05:24:32,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:32,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:24:32,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:32,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:24:32,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:24:32,916 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 5 states, 4 states have (on average 3.75) 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) [2022-07-20 05:24:32,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:32,963 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2022-07-20 05:24:32,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:24:32,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) 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 [2022-07-20 05:24:32,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:32,966 INFO L225 Difference]: With dead ends: 56 [2022-07-20 05:24:32,966 INFO L226 Difference]: Without dead ends: 56 [2022-07-20 05:24:32,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:24:32,967 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 62 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:32,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 76 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:24:32,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-20 05:24:32,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-07-20 05:24:32,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 55 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:32,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-07-20 05:24:32,971 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 15 [2022-07-20 05:24:32,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:32,972 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-07-20 05:24:32,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) 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) [2022-07-20 05:24:32,972 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-07-20 05:24:32,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-20 05:24:32,973 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:32,973 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:32,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 05:24:32,973 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:32,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:32,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1062113513, now seen corresponding path program 1 times [2022-07-20 05:24:32,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:32,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334818336] [2022-07-20 05:24:32,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:32,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:33,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:33,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:33,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334818336] [2022-07-20 05:24:33,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334818336] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:33,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:33,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:24:33,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087195736] [2022-07-20 05:24:33,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:33,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 05:24:33,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:33,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 05:24:33,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:24:33,062 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 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) [2022-07-20 05:24:33,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:33,138 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2022-07-20 05:24:33,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:24:33,139 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 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 [2022-07-20 05:24:33,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:33,139 INFO L225 Difference]: With dead ends: 66 [2022-07-20 05:24:33,139 INFO L226 Difference]: Without dead ends: 66 [2022-07-20 05:24:33,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:24:33,141 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 125 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:33,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 89 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:24:33,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-20 05:24:33,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2022-07-20 05:24:33,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.42) internal successors, (71), 56 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) [2022-07-20 05:24:33,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2022-07-20 05:24:33,145 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 15 [2022-07-20 05:24:33,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:33,145 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2022-07-20 05:24:33,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 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) [2022-07-20 05:24:33,146 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2022-07-20 05:24:33,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 05:24:33,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:33,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:33,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 05:24:33,147 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:33,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:33,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1408640871, now seen corresponding path program 1 times [2022-07-20 05:24:33,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:33,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425209752] [2022-07-20 05:24:33,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:33,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:33,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:33,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425209752] [2022-07-20 05:24:33,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425209752] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:33,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:33,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:24:33,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571774288] [2022-07-20 05:24:33,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:33,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:24:33,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:33,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:24:33,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:24:33,174 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:33,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:33,181 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2022-07-20 05:24:33,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:24:33,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-20 05:24:33,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:33,182 INFO L225 Difference]: With dead ends: 62 [2022-07-20 05:24:33,182 INFO L226 Difference]: Without dead ends: 62 [2022-07-20 05:24:33,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:24:33,184 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 14 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:33,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 82 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:24:33,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-20 05:24:33,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2022-07-20 05:24:33,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 51 states have (on average 1.411764705882353) internal successors, (72), 57 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:33,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2022-07-20 05:24:33,186 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 16 [2022-07-20 05:24:33,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:33,187 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2022-07-20 05:24:33,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:33,187 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2022-07-20 05:24:33,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 05:24:33,188 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:33,188 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:33,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-20 05:24:33,188 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:33,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:33,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1409435201, now seen corresponding path program 1 times [2022-07-20 05:24:33,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:33,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300229469] [2022-07-20 05:24:33,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:33,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:33,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:33,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:33,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300229469] [2022-07-20 05:24:33,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300229469] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:33,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:33,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:24:33,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449870789] [2022-07-20 05:24:33,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:33,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:24:33,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:33,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:24:33,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:24:33,223 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:33,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:33,265 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2022-07-20 05:24:33,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:24:33,265 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-20 05:24:33,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:33,266 INFO L225 Difference]: With dead ends: 57 [2022-07-20 05:24:33,266 INFO L226 Difference]: Without dead ends: 57 [2022-07-20 05:24:33,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:24:33,267 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 56 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:33,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 77 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:24:33,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-20 05:24:33,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-20 05:24:33,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.392156862745098) internal successors, (71), 56 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) [2022-07-20 05:24:33,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2022-07-20 05:24:33,270 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 16 [2022-07-20 05:24:33,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:33,270 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2022-07-20 05:24:33,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:33,271 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2022-07-20 05:24:33,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 05:24:33,271 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:33,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:33,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-20 05:24:33,272 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:33,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:33,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1409435200, now seen corresponding path program 1 times [2022-07-20 05:24:33,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:33,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984108220] [2022-07-20 05:24:33,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:33,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:33,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:33,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984108220] [2022-07-20 05:24:33,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984108220] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:33,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:33,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:24:33,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8308023] [2022-07-20 05:24:33,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:33,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:24:33,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:33,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:24:33,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:24:33,330 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:33,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:33,364 INFO L93 Difference]: Finished difference Result 87 states and 108 transitions. [2022-07-20 05:24:33,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:24:33,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-20 05:24:33,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:33,365 INFO L225 Difference]: With dead ends: 87 [2022-07-20 05:24:33,366 INFO L226 Difference]: Without dead ends: 87 [2022-07-20 05:24:33,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:24:33,366 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 31 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:33,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 131 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:24:33,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-20 05:24:33,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 61. [2022-07-20 05:24:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 60 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:33,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2022-07-20 05:24:33,369 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 16 [2022-07-20 05:24:33,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:33,369 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2022-07-20 05:24:33,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:33,369 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2022-07-20 05:24:33,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 05:24:33,370 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:33,370 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:33,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-20 05:24:33,370 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:33,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:33,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1434219452, now seen corresponding path program 1 times [2022-07-20 05:24:33,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:33,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115534381] [2022-07-20 05:24:33,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:33,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:33,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:33,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:33,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115534381] [2022-07-20 05:24:33,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115534381] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:33,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:33,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:24:33,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144915048] [2022-07-20 05:24:33,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:33,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:24:33,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:33,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:24:33,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:24:33,399 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:33,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:33,437 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2022-07-20 05:24:33,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:24:33,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-20 05:24:33,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:33,438 INFO L225 Difference]: With dead ends: 60 [2022-07-20 05:24:33,438 INFO L226 Difference]: Without dead ends: 60 [2022-07-20 05:24:33,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:24:33,439 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 57 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:33,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 76 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:24:33,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-20 05:24:33,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-20 05:24:33,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 59 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:33,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2022-07-20 05:24:33,442 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 16 [2022-07-20 05:24:33,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:33,442 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2022-07-20 05:24:33,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:33,442 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2022-07-20 05:24:33,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 05:24:33,443 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:33,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:33,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-20 05:24:33,443 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:33,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:33,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1434219451, now seen corresponding path program 1 times [2022-07-20 05:24:33,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:33,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942415173] [2022-07-20 05:24:33,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:33,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:33,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:33,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:33,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942415173] [2022-07-20 05:24:33,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942415173] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:33,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:33,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 05:24:33,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133599343] [2022-07-20 05:24:33,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:33,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:24:33,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:33,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:24:33,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:24:33,525 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:33,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:33,595 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2022-07-20 05:24:33,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:24:33,596 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-20 05:24:33,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:33,596 INFO L225 Difference]: With dead ends: 70 [2022-07-20 05:24:33,596 INFO L226 Difference]: Without dead ends: 70 [2022-07-20 05:24:33,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:24:33,597 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 131 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:33,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 94 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:24:33,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-20 05:24:33,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2022-07-20 05:24:33,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 60 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:33,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2022-07-20 05:24:33,599 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 16 [2022-07-20 05:24:33,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:33,599 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2022-07-20 05:24:33,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:33,599 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2022-07-20 05:24:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 05:24:33,600 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:33,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:33,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-20 05:24:33,600 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:33,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:33,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1996241214, now seen corresponding path program 1 times [2022-07-20 05:24:33,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:33,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524779186] [2022-07-20 05:24:33,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:33,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:33,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:33,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:33,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:33,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524779186] [2022-07-20 05:24:33,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524779186] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:33,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:33,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:24:33,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700026084] [2022-07-20 05:24:33,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:33,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:24:33,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:33,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:24:33,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:24:33,651 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:33,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:33,682 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2022-07-20 05:24:33,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:24:33,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-20 05:24:33,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:33,683 INFO L225 Difference]: With dead ends: 60 [2022-07-20 05:24:33,683 INFO L226 Difference]: Without dead ends: 60 [2022-07-20 05:24:33,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:24:33,684 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 75 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:33,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 71 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:24:33,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-20 05:24:33,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2022-07-20 05:24:33,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 55 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:33,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2022-07-20 05:24:33,686 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 16 [2022-07-20 05:24:33,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:33,686 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2022-07-20 05:24:33,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:33,687 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2022-07-20 05:24:33,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-20 05:24:33,687 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:33,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:33,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-20 05:24:33,688 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:33,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:33,688 INFO L85 PathProgramCache]: Analyzing trace with hash 399147362, now seen corresponding path program 1 times [2022-07-20 05:24:33,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:33,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814532508] [2022-07-20 05:24:33,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:33,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:33,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:33,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814532508] [2022-07-20 05:24:33,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814532508] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:33,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:33,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:24:33,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133627357] [2022-07-20 05:24:33,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:33,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:24:33,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:33,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:24:33,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:24:33,736 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:33,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:33,777 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2022-07-20 05:24:33,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:24:33,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-20 05:24:33,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:33,778 INFO L225 Difference]: With dead ends: 100 [2022-07-20 05:24:33,778 INFO L226 Difference]: Without dead ends: 100 [2022-07-20 05:24:33,778 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 [2022-07-20 05:24:33,779 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 66 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:33,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 174 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:24:33,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-20 05:24:33,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 67. [2022-07-20 05:24:33,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.3225806451612903) internal successors, (82), 66 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:33,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2022-07-20 05:24:33,782 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 18 [2022-07-20 05:24:33,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:33,782 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2022-07-20 05:24:33,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:33,782 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2022-07-20 05:24:33,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-20 05:24:33,783 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:33,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:33,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-20 05:24:33,783 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:33,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:33,783 INFO L85 PathProgramCache]: Analyzing trace with hash 398353033, now seen corresponding path program 1 times [2022-07-20 05:24:33,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:33,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267144726] [2022-07-20 05:24:33,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:33,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:33,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:33,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:33,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267144726] [2022-07-20 05:24:33,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267144726] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:33,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:33,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:24:33,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885702133] [2022-07-20 05:24:33,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:33,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:24:33,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:33,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:24:33,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:24:33,855 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:33,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:33,896 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2022-07-20 05:24:33,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:24:33,897 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-20 05:24:33,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:33,898 INFO L225 Difference]: With dead ends: 88 [2022-07-20 05:24:33,898 INFO L226 Difference]: Without dead ends: 88 [2022-07-20 05:24:33,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:24:33,899 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 49 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:33,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 166 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:24:33,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-20 05:24:33,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 75. [2022-07-20 05:24:33,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.3571428571428572) internal successors, (95), 74 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:33,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2022-07-20 05:24:33,901 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 18 [2022-07-20 05:24:33,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:33,902 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2022-07-20 05:24:33,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:33,903 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2022-07-20 05:24:33,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-20 05:24:33,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:33,903 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:33,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-20 05:24:33,904 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:33,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:33,904 INFO L85 PathProgramCache]: Analyzing trace with hash -880716316, now seen corresponding path program 1 times [2022-07-20 05:24:33,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:33,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548635707] [2022-07-20 05:24:33,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:33,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:33,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:33,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548635707] [2022-07-20 05:24:33,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548635707] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:33,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:33,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 05:24:33,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320056581] [2022-07-20 05:24:33,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:33,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:24:33,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:33,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:24:33,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:24:33,977 INFO L87 Difference]: Start difference. First operand 75 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:34,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:34,050 INFO L93 Difference]: Finished difference Result 125 states and 154 transitions. [2022-07-20 05:24:34,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:24:34,050 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-20 05:24:34,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:34,051 INFO L225 Difference]: With dead ends: 125 [2022-07-20 05:24:34,051 INFO L226 Difference]: Without dead ends: 125 [2022-07-20 05:24:34,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:24:34,052 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 157 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:34,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 193 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:24:34,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-20 05:24:34,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 87. [2022-07-20 05:24:34,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.3414634146341464) internal successors, (110), 86 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:34,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2022-07-20 05:24:34,054 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 18 [2022-07-20 05:24:34,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:34,055 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2022-07-20 05:24:34,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:34,055 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2022-07-20 05:24:34,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-20 05:24:34,055 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:34,055 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:34,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-20 05:24:34,055 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:34,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:34,056 INFO L85 PathProgramCache]: Analyzing trace with hash -881510645, now seen corresponding path program 1 times [2022-07-20 05:24:34,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:34,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750332433] [2022-07-20 05:24:34,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:34,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:34,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:34,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:34,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750332433] [2022-07-20 05:24:34,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750332433] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:34,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:34,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 05:24:34,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038131506] [2022-07-20 05:24:34,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:34,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 05:24:34,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:34,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 05:24:34,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:24:34,123 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:34,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:34,169 INFO L93 Difference]: Finished difference Result 87 states and 108 transitions. [2022-07-20 05:24:34,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:24:34,170 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-20 05:24:34,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:34,170 INFO L225 Difference]: With dead ends: 87 [2022-07-20 05:24:34,171 INFO L226 Difference]: Without dead ends: 87 [2022-07-20 05:24:34,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:24:34,171 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 93 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:34,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 69 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:24:34,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-20 05:24:34,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2022-07-20 05:24:34,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 67 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2022-07-20 05:24:34,173 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 18 [2022-07-20 05:24:34,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:34,174 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2022-07-20 05:24:34,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:34,174 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2022-07-20 05:24:34,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-20 05:24:34,174 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:34,174 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:34,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-20 05:24:34,174 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:34,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:34,175 INFO L85 PathProgramCache]: Analyzing trace with hash -536115456, now seen corresponding path program 1 times [2022-07-20 05:24:34,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:34,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019463778] [2022-07-20 05:24:34,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:34,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:34,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:34,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:34,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019463778] [2022-07-20 05:24:34,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019463778] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:34,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:34,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 05:24:34,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856848839] [2022-07-20 05:24:34,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:34,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:24:34,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:34,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:24:34,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:24:34,231 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 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) [2022-07-20 05:24:34,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:34,296 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2022-07-20 05:24:34,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:24:34,297 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 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 [2022-07-20 05:24:34,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:34,297 INFO L225 Difference]: With dead ends: 75 [2022-07-20 05:24:34,297 INFO L226 Difference]: Without dead ends: 75 [2022-07-20 05:24:34,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:24:34,298 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 60 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:34,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 81 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:24:34,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-20 05:24:34,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2022-07-20 05:24:34,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 69 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:34,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2022-07-20 05:24:34,300 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 19 [2022-07-20 05:24:34,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:34,300 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2022-07-20 05:24:34,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 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) [2022-07-20 05:24:34,300 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2022-07-20 05:24:34,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 05:24:34,301 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:34,301 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:34,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-20 05:24:34,301 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:34,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:34,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1773371798, now seen corresponding path program 1 times [2022-07-20 05:24:34,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:34,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649916626] [2022-07-20 05:24:34,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:34,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:24:34,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:34,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649916626] [2022-07-20 05:24:34,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649916626] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:34,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:34,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:24:34,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726457477] [2022-07-20 05:24:34,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:34,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:24:34,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:34,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:24:34,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:24:34,347 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:34,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:34,389 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2022-07-20 05:24:34,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:24:34,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-20 05:24:34,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:34,390 INFO L225 Difference]: With dead ends: 89 [2022-07-20 05:24:34,390 INFO L226 Difference]: Without dead ends: 89 [2022-07-20 05:24:34,390 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 [2022-07-20 05:24:34,390 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 17 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:34,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 153 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:24:34,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-20 05:24:34,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 76. [2022-07-20 05:24:34,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.267605633802817) internal successors, (90), 75 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:34,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2022-07-20 05:24:34,393 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 20 [2022-07-20 05:24:34,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:34,393 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2022-07-20 05:24:34,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:34,393 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2022-07-20 05:24:34,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 05:24:34,393 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:34,393 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:34,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-20 05:24:34,394 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:34,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:34,394 INFO L85 PathProgramCache]: Analyzing trace with hash 185023896, now seen corresponding path program 1 times [2022-07-20 05:24:34,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:34,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017944994] [2022-07-20 05:24:34,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:34,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:34,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:24:34,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:34,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017944994] [2022-07-20 05:24:34,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017944994] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:34,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:34,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 05:24:34,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126420295] [2022-07-20 05:24:34,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:34,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:24:34,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:34,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:24:34,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:24:34,477 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:34,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:34,541 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2022-07-20 05:24:34,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:24:34,541 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-20 05:24:34,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:34,542 INFO L225 Difference]: With dead ends: 87 [2022-07-20 05:24:34,542 INFO L226 Difference]: Without dead ends: 87 [2022-07-20 05:24:34,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:24:34,543 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 81 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:34,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 175 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:24:34,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-20 05:24:34,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 66. [2022-07-20 05:24:34,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.278688524590164) internal successors, (78), 65 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) [2022-07-20 05:24:34,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2022-07-20 05:24:34,546 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 20 [2022-07-20 05:24:34,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:34,546 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2022-07-20 05:24:34,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:34,547 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2022-07-20 05:24:34,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-20 05:24:34,548 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:34,548 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:34,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-20 05:24:34,548 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:34,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:34,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1567874516, now seen corresponding path program 1 times [2022-07-20 05:24:34,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:34,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311734209] [2022-07-20 05:24:34,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:34,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:34,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:34,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311734209] [2022-07-20 05:24:34,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311734209] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:34,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:34,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-20 05:24:34,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642101075] [2022-07-20 05:24:34,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:34,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 05:24:34,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:34,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 05:24:34,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:24:34,670 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:34,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:34,806 INFO L93 Difference]: Finished difference Result 122 states and 139 transitions. [2022-07-20 05:24:34,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:24:34,806 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-20 05:24:34,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:34,807 INFO L225 Difference]: With dead ends: 122 [2022-07-20 05:24:34,807 INFO L226 Difference]: Without dead ends: 122 [2022-07-20 05:24:34,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-07-20 05:24:34,808 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 119 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:34,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 248 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:24:34,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-20 05:24:34,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 93. [2022-07-20 05:24:34,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.2386363636363635) internal successors, (109), 92 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) [2022-07-20 05:24:34,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2022-07-20 05:24:34,811 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 22 [2022-07-20 05:24:34,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:34,811 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2022-07-20 05:24:34,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:34,811 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2022-07-20 05:24:34,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-20 05:24:34,812 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:34,812 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:34,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-20 05:24:34,812 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:34,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:34,813 INFO L85 PathProgramCache]: Analyzing trace with hash -192272511, now seen corresponding path program 1 times [2022-07-20 05:24:34,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:34,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662311822] [2022-07-20 05:24:34,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:34,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:34,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:34,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:24:34,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:34,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662311822] [2022-07-20 05:24:34,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662311822] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:34,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:34,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:24:34,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076661375] [2022-07-20 05:24:34,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:34,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:24:34,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:34,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:24:34,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:24:34,863 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2022-07-20 05:24:34,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:34,873 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2022-07-20 05:24:34,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:24:34,873 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-20 05:24:34,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:34,874 INFO L225 Difference]: With dead ends: 98 [2022-07-20 05:24:34,874 INFO L226 Difference]: Without dead ends: 98 [2022-07-20 05:24:34,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:24:34,875 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 24 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:34,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 70 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:24:34,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-20 05:24:34,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2022-07-20 05:24:34,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.2183908045977012) internal successors, (106), 91 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:34,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2022-07-20 05:24:34,877 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 22 [2022-07-20 05:24:34,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:34,878 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2022-07-20 05:24:34,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2022-07-20 05:24:34,878 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2022-07-20 05:24:34,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-20 05:24:34,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:34,878 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:34,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-20 05:24:34,879 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:34,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:34,879 INFO L85 PathProgramCache]: Analyzing trace with hash 750226066, now seen corresponding path program 1 times [2022-07-20 05:24:34,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:34,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447995590] [2022-07-20 05:24:34,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:34,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:34,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:34,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:34,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447995590] [2022-07-20 05:24:34,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447995590] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:34,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:34,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-20 05:24:34,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876740100] [2022-07-20 05:24:34,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:34,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:24:34,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:34,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:24:34,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:24:34,983 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 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) [2022-07-20 05:24:35,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:35,135 INFO L93 Difference]: Finished difference Result 152 states and 173 transitions. [2022-07-20 05:24:35,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 05:24:35,136 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-20 05:24:35,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:35,137 INFO L225 Difference]: With dead ends: 152 [2022-07-20 05:24:35,137 INFO L226 Difference]: Without dead ends: 152 [2022-07-20 05:24:35,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:24:35,138 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 172 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:35,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 185 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:24:35,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-07-20 05:24:35,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 94. [2022-07-20 05:24:35,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.2359550561797752) internal successors, (110), 93 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:35,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 110 transitions. [2022-07-20 05:24:35,140 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 110 transitions. Word has length 22 [2022-07-20 05:24:35,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:35,140 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 110 transitions. [2022-07-20 05:24:35,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 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) [2022-07-20 05:24:35,141 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 110 transitions. [2022-07-20 05:24:35,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-20 05:24:35,141 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:35,141 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:35,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-20 05:24:35,141 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:35,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:35,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1359425129, now seen corresponding path program 1 times [2022-07-20 05:24:35,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:35,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529968988] [2022-07-20 05:24:35,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:35,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:35,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:35,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529968988] [2022-07-20 05:24:35,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529968988] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:35,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:24:35,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:24:35,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996980711] [2022-07-20 05:24:35,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:35,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:24:35,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:35,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:24:35,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:24:35,200 INFO L87 Difference]: Start difference. First operand 94 states and 110 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:35,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:35,216 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2022-07-20 05:24:35,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:24:35,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-20 05:24:35,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:35,217 INFO L225 Difference]: With dead ends: 93 [2022-07-20 05:24:35,217 INFO L226 Difference]: Without dead ends: 74 [2022-07-20 05:24:35,217 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 [2022-07-20 05:24:35,218 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:35,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 64 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:24:35,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-20 05:24:35,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-07-20 05:24:35,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 72 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:35,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2022-07-20 05:24:35,220 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 23 [2022-07-20 05:24:35,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:35,221 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2022-07-20 05:24:35,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:35,221 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2022-07-20 05:24:35,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-20 05:24:35,221 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:35,221 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:35,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-20 05:24:35,221 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:35,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:35,222 INFO L85 PathProgramCache]: Analyzing trace with hash 354556917, now seen corresponding path program 1 times [2022-07-20 05:24:35,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:35,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715830111] [2022-07-20 05:24:35,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:35,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:35,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:35,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715830111] [2022-07-20 05:24:35,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715830111] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:24:35,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081136430] [2022-07-20 05:24:35,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:35,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:24:35,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:24:35,301 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) [2022-07-20 05:24:35,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 05:24:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:35,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-20 05:24:35,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:24:35,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:24:35,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:24:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:24:35,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:24:35,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081136430] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:35,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:24:35,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-07-20 05:24:35,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117696681] [2022-07-20 05:24:35,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:35,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 05:24:35,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:35,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 05:24:35,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-07-20 05:24:35,515 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2022-07-20 05:24:35,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:35,633 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2022-07-20 05:24:35,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:24:35,633 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 24 [2022-07-20 05:24:35,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:35,634 INFO L225 Difference]: With dead ends: 96 [2022-07-20 05:24:35,634 INFO L226 Difference]: Without dead ends: 96 [2022-07-20 05:24:35,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-07-20 05:24:35,636 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 33 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:35,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 214 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:24:35,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-20 05:24:35,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2022-07-20 05:24:35,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 87 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) [2022-07-20 05:24:35,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2022-07-20 05:24:35,640 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 24 [2022-07-20 05:24:35,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:35,640 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2022-07-20 05:24:35,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2022-07-20 05:24:35,640 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2022-07-20 05:24:35,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-20 05:24:35,641 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:35,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:35,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 05:24:35,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:24:35,864 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:35,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:35,864 INFO L85 PathProgramCache]: Analyzing trace with hash 354522096, now seen corresponding path program 1 times [2022-07-20 05:24:35,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:35,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279809059] [2022-07-20 05:24:35,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:35,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:35,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:35,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279809059] [2022-07-20 05:24:35,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279809059] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:24:35,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688234406] [2022-07-20 05:24:35,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:35,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:24:35,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:24:35,961 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) [2022-07-20 05:24:35,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 05:24:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:36,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 05:24:36,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:24:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:36,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:24:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:24:36,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688234406] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-20 05:24:36,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:24:36,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 5] total 14 [2022-07-20 05:24:36,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679118273] [2022-07-20 05:24:36,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:36,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:24:36,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:36,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:24:36,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:24:36,117 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 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) [2022-07-20 05:24:36,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:36,124 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2022-07-20 05:24:36,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:24:36,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 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 24 [2022-07-20 05:24:36,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:36,125 INFO L225 Difference]: With dead ends: 89 [2022-07-20 05:24:36,125 INFO L226 Difference]: Without dead ends: 70 [2022-07-20 05:24:36,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:24:36,126 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:36,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 63 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:24:36,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-20 05:24:36,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-07-20 05:24:36,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 66 states have (on average 1.196969696969697) internal successors, (79), 69 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:36,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2022-07-20 05:24:36,128 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 24 [2022-07-20 05:24:36,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:36,128 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2022-07-20 05:24:36,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 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) [2022-07-20 05:24:36,128 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2022-07-20 05:24:36,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-20 05:24:36,129 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:36,129 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:36,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 05:24:36,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:24:36,347 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:36,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:36,347 INFO L85 PathProgramCache]: Analyzing trace with hash 573411635, now seen corresponding path program 1 times [2022-07-20 05:24:36,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:36,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084070154] [2022-07-20 05:24:36,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:36,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:36,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:36,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084070154] [2022-07-20 05:24:36,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084070154] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:24:36,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049422709] [2022-07-20 05:24:36,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:36,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:24:36,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:24:36,427 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) [2022-07-20 05:24:36,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 05:24:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:36,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-20 05:24:36,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:24:36,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:24:36,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:24:36,699 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:24:36,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-20 05:24:36,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:24:36,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:24:36,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049422709] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:24:36,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:24:36,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2022-07-20 05:24:36,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135137490] [2022-07-20 05:24:36,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:24:36,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 05:24:36,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:36,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 05:24:36,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-07-20 05:24:36,718 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-07-20 05:24:36,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:36,784 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2022-07-20 05:24:36,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 05:24:36,785 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 24 [2022-07-20 05:24:36,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:36,785 INFO L225 Difference]: With dead ends: 83 [2022-07-20 05:24:36,785 INFO L226 Difference]: Without dead ends: 68 [2022-07-20 05:24:36,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-07-20 05:24:36,786 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 39 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:36,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 205 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 56 Unchecked, 0.0s Time] [2022-07-20 05:24:36,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-20 05:24:36,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2022-07-20 05:24:36,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 57 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:36,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2022-07-20 05:24:36,788 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 24 [2022-07-20 05:24:36,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:36,788 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2022-07-20 05:24:36,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-07-20 05:24:36,788 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2022-07-20 05:24:36,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-20 05:24:36,788 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:36,788 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:36,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 05:24:36,988 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,SelfDestructingSolverStorable33 [2022-07-20 05:24:36,989 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:36,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:36,989 INFO L85 PathProgramCache]: Analyzing trace with hash 522576623, now seen corresponding path program 1 times [2022-07-20 05:24:36,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:36,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921547777] [2022-07-20 05:24:36,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:36,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:37,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:37,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:37,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921547777] [2022-07-20 05:24:37,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921547777] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:24:37,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445707621] [2022-07-20 05:24:37,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:37,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:24:37,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:24:37,091 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) [2022-07-20 05:24:37,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 05:24:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:37,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-20 05:24:37,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:24:37,185 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:24:37,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:24:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:37,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:24:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:37,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445707621] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:24:37,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:24:37,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2022-07-20 05:24:37,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463177339] [2022-07-20 05:24:37,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:24:37,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-20 05:24:37,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:37,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-20 05:24:37,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-07-20 05:24:37,509 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 21 states, 20 states have (on average 3.5) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:37,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:37,829 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2022-07-20 05:24:37,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:24:37,830 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.5) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-20 05:24:37,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:37,830 INFO L225 Difference]: With dead ends: 75 [2022-07-20 05:24:37,830 INFO L226 Difference]: Without dead ends: 75 [2022-07-20 05:24:37,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2022-07-20 05:24:37,831 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 215 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:37,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 221 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:24:37,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-20 05:24:37,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2022-07-20 05:24:37,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 66 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) [2022-07-20 05:24:37,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2022-07-20 05:24:37,833 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 26 [2022-07-20 05:24:37,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:37,833 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2022-07-20 05:24:37,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.5) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:37,833 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2022-07-20 05:24:37,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 05:24:37,834 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:37,834 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:37,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 05:24:38,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:24:38,044 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:38,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:38,044 INFO L85 PathProgramCache]: Analyzing trace with hash 563475792, now seen corresponding path program 1 times [2022-07-20 05:24:38,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:38,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043637563] [2022-07-20 05:24:38,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:38,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:38,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:24:38,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:38,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043637563] [2022-07-20 05:24:38,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043637563] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:24:38,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98173705] [2022-07-20 05:24:38,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:38,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:24:38,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:24:38,145 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) [2022-07-20 05:24:38,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 05:24:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:38,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-20 05:24:38,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:24:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:24:38,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:24:38,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-20 05:24:38,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:24:38,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98173705] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:24:38,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:24:38,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-07-20 05:24:38,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049155751] [2022-07-20 05:24:38,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:24:38,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 05:24:38,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:38,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 05:24:38,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-07-20 05:24:38,470 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 19 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) [2022-07-20 05:24:38,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:38,695 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2022-07-20 05:24:38,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:24:38,696 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 19 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) Word has length 28 [2022-07-20 05:24:38,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:38,696 INFO L225 Difference]: With dead ends: 78 [2022-07-20 05:24:38,696 INFO L226 Difference]: Without dead ends: 78 [2022-07-20 05:24:38,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2022-07-20 05:24:38,697 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 255 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:38,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 172 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:24:38,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-20 05:24:38,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2022-07-20 05:24:38,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 64 states have (on average 1.203125) internal successors, (77), 67 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:38,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2022-07-20 05:24:38,699 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 28 [2022-07-20 05:24:38,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:38,699 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2022-07-20 05:24:38,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 19 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) [2022-07-20 05:24:38,699 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2022-07-20 05:24:38,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 05:24:38,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:38,699 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:38,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 05:24:38,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:24:38,908 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:38,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:38,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1176221819, now seen corresponding path program 2 times [2022-07-20 05:24:38,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:38,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767618553] [2022-07-20 05:24:38,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:38,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:38,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:39,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:39,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:39,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767618553] [2022-07-20 05:24:39,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767618553] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:24:39,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222742666] [2022-07-20 05:24:39,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:24:39,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:24:39,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:24:39,131 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) [2022-07-20 05:24:39,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 05:24:39,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:24:39,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:24:39,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-20 05:24:39,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:24:39,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:24:39,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:24:39,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 05:24:39,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:24:39,676 INFO L356 Elim1Store]: treesize reduction 6, result has 68.4 percent of original size [2022-07-20 05:24:39,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 26 [2022-07-20 05:24:39,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:39,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:24:40,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 05:24:40,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-07-20 05:24:40,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:24:40,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2022-07-20 05:24:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:40,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222742666] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:24:40,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:24:40,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 36 [2022-07-20 05:24:40,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426822266] [2022-07-20 05:24:40,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:24:40,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-20 05:24:40,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:40,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-20 05:24:40,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2022-07-20 05:24:40,353 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:41,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:41,061 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2022-07-20 05:24:41,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-20 05:24:41,061 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-20 05:24:41,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:41,062 INFO L225 Difference]: With dead ends: 119 [2022-07-20 05:24:41,062 INFO L226 Difference]: Without dead ends: 102 [2022-07-20 05:24:41,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=312, Invalid=2444, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 05:24:41,063 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 142 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:41,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 336 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 196 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2022-07-20 05:24:41,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-20 05:24:41,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2022-07-20 05:24:41,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 90 states have (on average 1.1666666666666667) internal successors, (105), 93 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:41,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2022-07-20 05:24:41,065 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 29 [2022-07-20 05:24:41,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:41,066 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2022-07-20 05:24:41,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:41,066 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2022-07-20 05:24:41,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 05:24:41,066 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:41,066 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:41,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 05:24:41,275 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,SelfDestructingSolverStorable36 [2022-07-20 05:24:41,276 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:41,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:41,276 INFO L85 PathProgramCache]: Analyzing trace with hash 287880382, now seen corresponding path program 1 times [2022-07-20 05:24:41,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:41,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548676587] [2022-07-20 05:24:41,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:41,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:24:41,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:41,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548676587] [2022-07-20 05:24:41,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548676587] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:24:41,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183312499] [2022-07-20 05:24:41,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:41,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:24:41,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:24:41,376 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) [2022-07-20 05:24:41,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 05:24:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:41,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-20 05:24:41,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:24:41,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:24:41,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:24:41,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:24:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:24:41,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:24:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:24:41,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183312499] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:24:41,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:24:41,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2022-07-20 05:24:41,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635005333] [2022-07-20 05:24:41,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:24:41,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-20 05:24:41,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:41,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-20 05:24:41,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-07-20 05:24:41,842 INFO L87 Difference]: Start difference. First operand 94 states and 105 transitions. Second operand has 25 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 25 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:42,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:42,221 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2022-07-20 05:24:42,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 05:24:42,222 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 25 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-20 05:24:42,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:42,222 INFO L225 Difference]: With dead ends: 130 [2022-07-20 05:24:42,222 INFO L226 Difference]: Without dead ends: 130 [2022-07-20 05:24:42,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2022-07-20 05:24:42,223 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 399 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:42,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 262 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:24:42,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-20 05:24:42,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 95. [2022-07-20 05:24:42,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 94 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:42,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2022-07-20 05:24:42,226 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 29 [2022-07-20 05:24:42,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:42,226 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2022-07-20 05:24:42,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 25 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:42,226 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2022-07-20 05:24:42,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-20 05:24:42,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:42,227 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:42,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-20 05:24:42,443 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,SelfDestructingSolverStorable37 [2022-07-20 05:24:42,444 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:42,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:42,444 INFO L85 PathProgramCache]: Analyzing trace with hash 808306063, now seen corresponding path program 2 times [2022-07-20 05:24:42,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:42,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406031610] [2022-07-20 05:24:42,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:42,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:42,528 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:24:42,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:42,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406031610] [2022-07-20 05:24:42,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406031610] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:24:42,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591889579] [2022-07-20 05:24:42,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:24:42,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:24:42,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:24:42,532 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) [2022-07-20 05:24:42,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 05:24:42,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:24:42,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:24:42,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-20 05:24:42,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:24:42,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:24:42,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:24:42,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:24:42,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:24:43,046 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:24:43,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-07-20 05:24:43,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:24:43,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:24:43,409 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_535 (Array Int Int)) (|v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_23| Int)) (or (<= (+ 3 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_23|) (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (not (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_23|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_535) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_23| 1)) 0) (not (<= |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_23| |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)))) is different from false [2022-07-20 05:24:43,439 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_535 (Array Int Int)) (|v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_23| Int)) (or (< |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_23|) (not (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_23|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_535) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_23| 1)) 0) (<= (+ 3 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_23|) (select |c_#length| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)))) is different from false [2022-07-20 05:24:43,448 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:24:43,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:24:43,455 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:24:43,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-20 05:24:43,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:24:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2022-07-20 05:24:43,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591889579] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:24:43,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:24:43,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 31 [2022-07-20 05:24:43,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588038046] [2022-07-20 05:24:43,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:24:43,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-20 05:24:43,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:43,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-20 05:24:43,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=729, Unknown=2, NotChecked=110, Total=930 [2022-07-20 05:24:43,836 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:44,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:44,436 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2022-07-20 05:24:44,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-20 05:24:44,437 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-20 05:24:44,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:44,438 INFO L225 Difference]: With dead ends: 138 [2022-07-20 05:24:44,438 INFO L226 Difference]: Without dead ends: 138 [2022-07-20 05:24:44,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=206, Invalid=1606, Unknown=2, NotChecked=166, Total=1980 [2022-07-20 05:24:44,439 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 64 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:44,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 423 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 293 Invalid, 0 Unknown, 299 Unchecked, 0.2s Time] [2022-07-20 05:24:44,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-20 05:24:44,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 124. [2022-07-20 05:24:44,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 120 states have (on average 1.15) internal successors, (138), 123 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:44,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 138 transitions. [2022-07-20 05:24:44,441 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 138 transitions. Word has length 33 [2022-07-20 05:24:44,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:44,441 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 138 transitions. [2022-07-20 05:24:44,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:44,442 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 138 transitions. [2022-07-20 05:24:44,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-20 05:24:44,442 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:44,442 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:44,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 05:24:44,659 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,SelfDestructingSolverStorable38 [2022-07-20 05:24:44,659 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:44,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:44,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1852639117, now seen corresponding path program 1 times [2022-07-20 05:24:44,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:44,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303512670] [2022-07-20 05:24:44,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:44,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:44,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:24:44,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:44,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303512670] [2022-07-20 05:24:44,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303512670] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:24:44,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747865269] [2022-07-20 05:24:44,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:44,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:24:44,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:24:44,881 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) [2022-07-20 05:24:44,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 05:24:44,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:44,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-20 05:24:44,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:24:44,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:24:45,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:24:45,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 05:24:45,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 05:24:45,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:24:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:24:45,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:24:45,271 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_576 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_576) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2022-07-20 05:24:45,289 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_575 (Array Int Int)) (v_ArrVal_576 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_575) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_576) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2022-07-20 05:24:45,366 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:24:45,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:24:45,371 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:24:45,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-20 05:24:45,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:24:45,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-07-20 05:24:45,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747865269] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:24:45,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:24:45,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-07-20 05:24:45,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021232096] [2022-07-20 05:24:45,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:24:45,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-20 05:24:45,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:45,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-20 05:24:45,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=701, Unknown=2, NotChecked=110, Total=930 [2022-07-20 05:24:45,533 INFO L87 Difference]: Start difference. First operand 124 states and 138 transitions. Second operand has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 31 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) [2022-07-20 05:24:45,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:45,849 INFO L93 Difference]: Finished difference Result 146 states and 160 transitions. [2022-07-20 05:24:45,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 05:24:45,850 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 31 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 35 [2022-07-20 05:24:45,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:45,850 INFO L225 Difference]: With dead ends: 146 [2022-07-20 05:24:45,850 INFO L226 Difference]: Without dead ends: 129 [2022-07-20 05:24:45,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=205, Invalid=1132, Unknown=3, NotChecked=142, Total=1482 [2022-07-20 05:24:45,851 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 136 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:45,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 422 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 203 Invalid, 0 Unknown, 183 Unchecked, 0.1s Time] [2022-07-20 05:24:45,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-20 05:24:45,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 123. [2022-07-20 05:24:45,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 119 states have (on average 1.1428571428571428) internal successors, (136), 122 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:45,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2022-07-20 05:24:45,854 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 35 [2022-07-20 05:24:45,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:45,854 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2022-07-20 05:24:45,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 31 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) [2022-07-20 05:24:45,854 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2022-07-20 05:24:45,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-20 05:24:45,854 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:45,854 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:45,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 05:24:46,063 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,SelfDestructingSolverStorable39 [2022-07-20 05:24:46,063 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:46,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:46,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1920808188, now seen corresponding path program 2 times [2022-07-20 05:24:46,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:46,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508856022] [2022-07-20 05:24:46,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:46,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:46,188 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:24:46,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:46,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508856022] [2022-07-20 05:24:46,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508856022] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:24:46,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984370819] [2022-07-20 05:24:46,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:24:46,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:24:46,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:24:46,192 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:24:46,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 05:24:46,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:24:46,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:24:46,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-20 05:24:46,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:24:46,290 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:24:46,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:24:46,462 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:24:46,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:24:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:24:46,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984370819] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:24:46,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:24:46,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-07-20 05:24:46,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372740595] [2022-07-20 05:24:46,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:24:46,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 05:24:46,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:46,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 05:24:46,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-07-20 05:24:46,609 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:47,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:47,407 INFO L93 Difference]: Finished difference Result 200 states and 213 transitions. [2022-07-20 05:24:47,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-20 05:24:47,407 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-20 05:24:47,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:47,408 INFO L225 Difference]: With dead ends: 200 [2022-07-20 05:24:47,408 INFO L226 Difference]: Without dead ends: 199 [2022-07-20 05:24:47,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=397, Invalid=1859, Unknown=0, NotChecked=0, Total=2256 [2022-07-20 05:24:47,409 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 450 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:47,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 587 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:24:47,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-20 05:24:47,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 132. [2022-07-20 05:24:47,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 128 states have (on average 1.1328125) internal successors, (145), 131 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) [2022-07-20 05:24:47,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 145 transitions. [2022-07-20 05:24:47,411 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 145 transitions. Word has length 38 [2022-07-20 05:24:47,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:47,411 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 145 transitions. [2022-07-20 05:24:47,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:47,412 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 145 transitions. [2022-07-20 05:24:47,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-20 05:24:47,412 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:47,412 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:47,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 05:24:47,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:24:47,631 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:24:47,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:47,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1449355768, now seen corresponding path program 3 times [2022-07-20 05:24:47,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:47,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021056247] [2022-07-20 05:24:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:47,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:47,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:47,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021056247] [2022-07-20 05:24:47,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021056247] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:24:47,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132719387] [2022-07-20 05:24:47,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:24:47,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:24:47,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:24:47,766 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) [2022-07-20 05:24:47,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 05:24:47,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-20 05:24:47,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:24:47,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-20 05:24:47,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:24:47,875 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:24:47,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:24:47,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:24:48,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:24:48,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-07-20 05:24:48,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-07-20 05:24:49,286 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-20 05:24:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:49,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:24:50,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 60 [2022-07-20 05:24:52,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:24:52,153 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-07-20 05:24:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:24:52,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132719387] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:24:52,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:24:52,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 38 [2022-07-20 05:24:52,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958861967] [2022-07-20 05:24:52,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:24:52,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-20 05:24:52,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:52,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-20 05:24:52,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1210, Unknown=1, NotChecked=0, Total=1406 [2022-07-20 05:24:52,156 INFO L87 Difference]: Start difference. First operand 132 states and 145 transitions. Second operand has 38 states, 38 states have (on average 2.763157894736842) internal successors, (105), 38 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:25:39,296 WARN L233 SmtUtils]: Spent 46.16s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-20 05:26:00,386 WARN L233 SmtUtils]: Spent 20.67s on a formula simplification. DAG size of input: 63 DAG size of output: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-20 05:26:00,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:26:00,620 INFO L93 Difference]: Finished difference Result 261 states and 285 transitions. [2022-07-20 05:26:00,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-20 05:26:00,620 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.763157894736842) internal successors, (105), 38 states have internal predecessors, (105), 0 states have call successors, (0), 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 39 [2022-07-20 05:26:00,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:26:00,621 INFO L225 Difference]: With dead ends: 261 [2022-07-20 05:26:00,621 INFO L226 Difference]: Without dead ends: 195 [2022-07-20 05:26:00,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 70.5s TimeCoverageRelationStatistics Valid=474, Invalid=3065, Unknown=1, NotChecked=0, Total=3540 [2022-07-20 05:26:00,622 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 174 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:26:00,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 411 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 263 Invalid, 0 Unknown, 316 Unchecked, 0.2s Time] [2022-07-20 05:26:00,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-07-20 05:26:00,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 170. [2022-07-20 05:26:00,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 166 states have (on average 1.1265060240963856) internal successors, (187), 169 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:00,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 187 transitions. [2022-07-20 05:26:00,626 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 187 transitions. Word has length 39 [2022-07-20 05:26:00,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:26:00,626 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 187 transitions. [2022-07-20 05:26:00,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.763157894736842) internal successors, (105), 38 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:00,626 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 187 transitions. [2022-07-20 05:26:00,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-20 05:26:00,627 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:26:00,627 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:26:00,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 05:26:00,847 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,SelfDestructingSolverStorable41 [2022-07-20 05:26:00,847 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:26:00,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:26:00,848 INFO L85 PathProgramCache]: Analyzing trace with hash -2118262960, now seen corresponding path program 2 times [2022-07-20 05:26:00,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:26:00,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054450069] [2022-07-20 05:26:00,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:26:00,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:26:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:26:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:26:00,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:26:00,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054450069] [2022-07-20 05:26:00,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054450069] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:26:00,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729032921] [2022-07-20 05:26:00,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:26:00,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:00,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:26:01,000 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) [2022-07-20 05:26:01,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 05:26:01,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:26:01,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:26:01,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-20 05:26:01,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:26:01,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:26:01,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:26:01,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-20 05:26:01,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:26:01,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729032921] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:26:01,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:26:01,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-07-20 05:26:01,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663666353] [2022-07-20 05:26:01,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:26:01,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-20 05:26:01,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:26:01,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-20 05:26:01,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-07-20 05:26:01,451 INFO L87 Difference]: Start difference. First operand 170 states and 187 transitions. Second operand has 23 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 23 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) [2022-07-20 05:26:01,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:26:01,826 INFO L93 Difference]: Finished difference Result 183 states and 200 transitions. [2022-07-20 05:26:01,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 05:26:01,826 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 23 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) Word has length 39 [2022-07-20 05:26:01,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:26:01,827 INFO L225 Difference]: With dead ends: 183 [2022-07-20 05:26:01,827 INFO L226 Difference]: Without dead ends: 183 [2022-07-20 05:26:01,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 05:26:01,828 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 154 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:26:01,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 423 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:26:01,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-07-20 05:26:01,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 173. [2022-07-20 05:26:01,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 169 states have (on average 1.1242603550295858) internal successors, (190), 172 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:01,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 190 transitions. [2022-07-20 05:26:01,832 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 190 transitions. Word has length 39 [2022-07-20 05:26:01,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:26:01,832 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 190 transitions. [2022-07-20 05:26:01,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 23 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) [2022-07-20 05:26:01,832 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 190 transitions. [2022-07-20 05:26:01,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-20 05:26:01,833 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:26:01,833 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:26:01,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-20 05:26:02,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:02,047 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:26:02,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:26:02,048 INFO L85 PathProgramCache]: Analyzing trace with hash 908332777, now seen corresponding path program 1 times [2022-07-20 05:26:02,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:26:02,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622744282] [2022-07-20 05:26:02,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:26:02,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:26:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:26:02,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:26:02,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:26:02,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622744282] [2022-07-20 05:26:02,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622744282] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:26:02,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572930159] [2022-07-20 05:26:02,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:26:02,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:02,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:26:02,249 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) [2022-07-20 05:26:02,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 05:26:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:26:02,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-20 05:26:02,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:26:02,355 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:26:02,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:26:02,549 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:26:02,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-20 05:26:02,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:26:02,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 05:26:02,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:26:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:26:02,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:26:02,689 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_741 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_741) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2022-07-20 05:26:02,695 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_741 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_741) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2022-07-20 05:26:02,703 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_741 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_741) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 1)) 0)) is different from false [2022-07-20 05:26:02,708 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:02,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:26:02,713 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:02,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-20 05:26:02,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:26:03,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-07-20 05:26:03,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572930159] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:26:03,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:26:03,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16] total 33 [2022-07-20 05:26:03,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171817964] [2022-07-20 05:26:03,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:26:03,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-20 05:26:03,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:26:03,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-20 05:26:03,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=751, Unknown=3, NotChecked=174, Total=1056 [2022-07-20 05:26:03,012 INFO L87 Difference]: Start difference. First operand 173 states and 190 transitions. Second operand has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:03,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:26:03,695 INFO L93 Difference]: Finished difference Result 168 states and 184 transitions. [2022-07-20 05:26:03,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 05:26:03,695 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-20 05:26:03,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:26:03,696 INFO L225 Difference]: With dead ends: 168 [2022-07-20 05:26:03,696 INFO L226 Difference]: Without dead ends: 144 [2022-07-20 05:26:03,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=401, Invalid=1500, Unknown=3, NotChecked=258, Total=2162 [2022-07-20 05:26:03,697 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 151 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:26:03,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 306 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 392 Invalid, 0 Unknown, 191 Unchecked, 0.2s Time] [2022-07-20 05:26:03,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-20 05:26:03,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-07-20 05:26:03,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 140 states have (on average 1.1357142857142857) internal successors, (159), 143 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:03,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 159 transitions. [2022-07-20 05:26:03,699 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 159 transitions. Word has length 41 [2022-07-20 05:26:03,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:26:03,699 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 159 transitions. [2022-07-20 05:26:03,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:03,700 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 159 transitions. [2022-07-20 05:26:03,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-20 05:26:03,700 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:26:03,700 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:26:03,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-20 05:26:03,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:03,915 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:26:03,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:26:03,916 INFO L85 PathProgramCache]: Analyzing trace with hash 782689156, now seen corresponding path program 3 times [2022-07-20 05:26:03,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:26:03,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154927727] [2022-07-20 05:26:03,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:26:03,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:26:03,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:26:04,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:26:04,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:26:04,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154927727] [2022-07-20 05:26:04,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154927727] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:26:04,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320916750] [2022-07-20 05:26:04,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:26:04,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:04,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:26:04,399 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) [2022-07-20 05:26:04,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-20 05:26:04,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 05:26:04,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:26:04,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-20 05:26:04,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:26:04,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:26:04,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:26:04,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:26:04,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:26:05,028 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:05,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-07-20 05:26:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:26:05,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:26:05,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-07-20 05:26:05,623 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:05,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:26:05,630 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:05,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-20 05:26:05,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:26:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:26:05,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320916750] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:26:05,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:26:05,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 14] total 47 [2022-07-20 05:26:05,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231634857] [2022-07-20 05:26:05,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:26:05,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-20 05:26:05,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:26:05,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-20 05:26:05,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1986, Unknown=1, NotChecked=0, Total=2162 [2022-07-20 05:26:05,859 INFO L87 Difference]: Start difference. First operand 144 states and 159 transitions. Second operand has 47 states, 47 states have (on average 2.5106382978723403) internal successors, (118), 47 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:07,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:26:07,476 INFO L93 Difference]: Finished difference Result 185 states and 201 transitions. [2022-07-20 05:26:07,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-20 05:26:07,476 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.5106382978723403) internal successors, (118), 47 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-20 05:26:07,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:26:07,477 INFO L225 Difference]: With dead ends: 185 [2022-07-20 05:26:07,477 INFO L226 Difference]: Without dead ends: 165 [2022-07-20 05:26:07,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=494, Invalid=4761, Unknown=1, NotChecked=0, Total=5256 [2022-07-20 05:26:07,479 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 172 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:26:07,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 595 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 488 Invalid, 0 Unknown, 220 Unchecked, 0.3s Time] [2022-07-20 05:26:07,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-20 05:26:07,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 150. [2022-07-20 05:26:07,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 146 states have (on average 1.13013698630137) internal successors, (165), 149 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:07,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2022-07-20 05:26:07,482 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 42 [2022-07-20 05:26:07,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:26:07,482 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2022-07-20 05:26:07,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.5106382978723403) internal successors, (118), 47 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:07,483 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2022-07-20 05:26:07,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-20 05:26:07,483 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:26:07,483 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:26:07,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-20 05:26:07,695 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,SelfDestructingSolverStorable44 [2022-07-20 05:26:07,696 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:26:07,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:26:07,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1500484182, now seen corresponding path program 3 times [2022-07-20 05:26:07,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:26:07,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917871618] [2022-07-20 05:26:07,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:26:07,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:26:07,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:26:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:26:07,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:26:07,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917871618] [2022-07-20 05:26:07,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917871618] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:26:07,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462309744] [2022-07-20 05:26:07,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:26:07,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:07,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:26:07,844 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) [2022-07-20 05:26:07,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-20 05:26:08,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-20 05:26:08,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:26:08,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 104 conjunts are in the unsatisfiable core [2022-07-20 05:26:08,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:26:08,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:26:08,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:26:08,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:26:08,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:26:08,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:26:08,742 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:08,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-07-20 05:26:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:26:08,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:26:08,818 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_836 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_836) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2022-07-20 05:26:08,823 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_836 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_836) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2022-07-20 05:26:08,941 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:08,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:26:08,949 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:08,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-20 05:26:08,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:26:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 10 not checked. [2022-07-20 05:26:09,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462309744] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:26:09,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:26:09,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19, 17] total 42 [2022-07-20 05:26:09,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950909445] [2022-07-20 05:26:09,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:26:09,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-20 05:26:09,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:26:09,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-20 05:26:09,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1424, Unknown=2, NotChecked=154, Total=1722 [2022-07-20 05:26:09,327 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 42 states, 42 states have (on average 2.8095238095238093) internal successors, (118), 42 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:10,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:26:10,188 INFO L93 Difference]: Finished difference Result 275 states and 297 transitions. [2022-07-20 05:26:10,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-20 05:26:10,188 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.8095238095238093) internal successors, (118), 42 states have internal predecessors, (118), 0 states have call successors, (0), 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 [2022-07-20 05:26:10,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:26:10,189 INFO L225 Difference]: With dead ends: 275 [2022-07-20 05:26:10,189 INFO L226 Difference]: Without dead ends: 271 [2022-07-20 05:26:10,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=334, Invalid=3453, Unknown=3, NotChecked=242, Total=4032 [2022-07-20 05:26:10,190 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 153 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 677 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:26:10,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 996 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 516 Invalid, 0 Unknown, 677 Unchecked, 0.2s Time] [2022-07-20 05:26:10,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-07-20 05:26:10,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 178. [2022-07-20 05:26:10,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 174 states have (on average 1.132183908045977) internal successors, (197), 177 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:10,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 197 transitions. [2022-07-20 05:26:10,194 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 197 transitions. Word has length 46 [2022-07-20 05:26:10,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:26:10,194 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 197 transitions. [2022-07-20 05:26:10,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.8095238095238093) internal successors, (118), 42 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:10,194 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 197 transitions. [2022-07-20 05:26:10,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-20 05:26:10,195 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:26:10,195 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:26:10,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-20 05:26:10,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:10,419 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:26:10,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:26:10,420 INFO L85 PathProgramCache]: Analyzing trace with hash 79025934, now seen corresponding path program 4 times [2022-07-20 05:26:10,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:26:10,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650058756] [2022-07-20 05:26:10,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:26:10,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:26:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:26:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:26:10,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:26:10,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650058756] [2022-07-20 05:26:10,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650058756] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:26:10,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516623029] [2022-07-20 05:26:10,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:26:10,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:10,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:26:10,621 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) [2022-07-20 05:26:10,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-20 05:26:10,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:26:10,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:26:10,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-20 05:26:10,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:26:10,746 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:26:10,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:26:10,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:26:10,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 05:26:11,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-20 05:26:11,317 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:11,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-07-20 05:26:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:26:11,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:26:11,763 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_56| Int) (v_ArrVal_880 (Array Int Int))) (or (not (<= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_56| |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (<= (+ 5 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_56|) (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_880) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_56|)) 0) (not (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_56|)))) is different from false [2022-07-20 05:26:11,821 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_56| Int) (v_ArrVal_880 (Array Int Int))) (or (< |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_56|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_880) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ 3 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_56|)) 0) (not (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_56|)) (<= (+ 5 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_56|) (select |c_#length| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)))) is different from false [2022-07-20 05:26:11,829 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:11,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:26:11,837 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:11,837 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-20 05:26:11,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:26:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 28 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:26:12,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516623029] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:26:12,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:26:12,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 46 [2022-07-20 05:26:12,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590462828] [2022-07-20 05:26:12,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:26:12,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-20 05:26:12,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:26:12,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-20 05:26:12,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1769, Unknown=2, NotChecked=174, Total=2162 [2022-07-20 05:26:12,578 INFO L87 Difference]: Start difference. First operand 178 states and 197 transitions. Second operand has 47 states, 46 states have (on average 2.891304347826087) internal successors, (133), 47 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:14,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:26:14,981 INFO L93 Difference]: Finished difference Result 321 states and 347 transitions. [2022-07-20 05:26:14,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-20 05:26:14,982 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.891304347826087) internal successors, (133), 47 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-20 05:26:14,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:26:14,983 INFO L225 Difference]: With dead ends: 321 [2022-07-20 05:26:14,983 INFO L226 Difference]: Without dead ends: 321 [2022-07-20 05:26:14,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1363, Invalid=5783, Unknown=2, NotChecked=334, Total=7482 [2022-07-20 05:26:14,985 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 446 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:26:14,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 1061 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1284 Invalid, 0 Unknown, 276 Unchecked, 0.6s Time] [2022-07-20 05:26:14,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-07-20 05:26:14,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 229. [2022-07-20 05:26:14,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 225 states have (on average 1.1422222222222222) internal successors, (257), 228 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:14,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 257 transitions. [2022-07-20 05:26:14,989 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 257 transitions. Word has length 47 [2022-07-20 05:26:14,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:26:14,989 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 257 transitions. [2022-07-20 05:26:14,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.891304347826087) internal successors, (133), 47 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:14,990 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 257 transitions. [2022-07-20 05:26:14,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 05:26:14,990 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:26:14,991 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:26:15,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-20 05:26:15,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:15,215 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:26:15,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:26:15,216 INFO L85 PathProgramCache]: Analyzing trace with hash -691661592, now seen corresponding path program 4 times [2022-07-20 05:26:15,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:26:15,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818921089] [2022-07-20 05:26:15,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:26:15,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:26:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:26:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:26:15,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:26:15,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818921089] [2022-07-20 05:26:15,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818921089] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:26:15,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442000555] [2022-07-20 05:26:15,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:26:15,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:15,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:26:15,849 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) [2022-07-20 05:26:15,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-20 05:26:15,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:26:15,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:26:15,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-20 05:26:15,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:26:15,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:26:16,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:26:16,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:26:16,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 05:26:16,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 05:26:16,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:26:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:26:16,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:26:16,380 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_933 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_933) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2022-07-20 05:26:16,392 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_933 (Array Int Int)) (v_ArrVal_932 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_932) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_933) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2022-07-20 05:26:16,399 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_933 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_933) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2022-07-20 05:26:16,408 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_931 (Array Int Int)) (v_ArrVal_933 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_931) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_933) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2022-07-20 05:26:16,415 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_933 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_933) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2022-07-20 05:26:16,423 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_933 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_933) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) 0)) is different from false [2022-07-20 05:26:16,428 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:16,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:26:16,433 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:16,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-20 05:26:16,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:26:16,643 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 9 not checked. [2022-07-20 05:26:16,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442000555] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:26:16,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:26:16,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16, 16] total 40 [2022-07-20 05:26:16,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538380466] [2022-07-20 05:26:16,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:26:16,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-20 05:26:16,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:26:16,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-20 05:26:16,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1027, Unknown=6, NotChecked=414, Total=1560 [2022-07-20 05:26:16,651 INFO L87 Difference]: Start difference. First operand 229 states and 257 transitions. Second operand has 40 states, 40 states have (on average 2.45) internal successors, (98), 40 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) [2022-07-20 05:26:17,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:26:17,665 INFO L93 Difference]: Finished difference Result 274 states and 302 transitions. [2022-07-20 05:26:17,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-20 05:26:17,666 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 40 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-20 05:26:17,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:26:17,666 INFO L225 Difference]: With dead ends: 274 [2022-07-20 05:26:17,666 INFO L226 Difference]: Without dead ends: 219 [2022-07-20 05:26:17,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 76 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 6 IntricatePredicates, 1 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=283, Invalid=2284, Unknown=7, NotChecked=618, Total=3192 [2022-07-20 05:26:17,668 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 124 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:26:17,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 937 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 683 Invalid, 0 Unknown, 393 Unchecked, 0.3s Time] [2022-07-20 05:26:17,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-07-20 05:26:17,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2022-07-20 05:26:17,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 215 states have (on average 1.1395348837209303) internal successors, (245), 218 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:17,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 245 transitions. [2022-07-20 05:26:17,671 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 245 transitions. Word has length 48 [2022-07-20 05:26:17,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:26:17,672 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 245 transitions. [2022-07-20 05:26:17,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 40 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) [2022-07-20 05:26:17,672 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 245 transitions. [2022-07-20 05:26:17,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-20 05:26:17,673 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:26:17,673 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:26:17,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-20 05:26:17,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:17,898 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:26:17,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:26:17,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1700052269, now seen corresponding path program 5 times [2022-07-20 05:26:17,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:26:17,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016163401] [2022-07-20 05:26:17,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:26:17,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:26:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:26:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:26:18,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:26:18,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016163401] [2022-07-20 05:26:18,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016163401] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:26:18,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307734554] [2022-07-20 05:26:18,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:26:18,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:18,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:26:18,207 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) [2022-07-20 05:26:18,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-20 05:26:18,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-20 05:26:18,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:26:18,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-20 05:26:18,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:26:18,337 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:26:18,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:26:18,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 05:26:18,544 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:26:18,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2022-07-20 05:26:18,551 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 9 treesize of output 3 [2022-07-20 05:26:18,630 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-20 05:26:18,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 36 [2022-07-20 05:26:18,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:26:18,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:26:18,925 INFO L356 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2022-07-20 05:26:18,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 28 [2022-07-20 05:26:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 05:26:19,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:26:20,032 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:20,032 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2022-07-20 05:26:20,239 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:20,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2022-07-20 05:26:20,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:26:20,252 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:20,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 69 [2022-07-20 05:26:20,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:26:20,265 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:20,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 43 [2022-07-20 05:26:20,839 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 05:26:20,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307734554] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:26:20,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:26:20,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 16] total 49 [2022-07-20 05:26:20,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977524583] [2022-07-20 05:26:20,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:26:20,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-20 05:26:20,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:26:20,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-20 05:26:20,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2165, Unknown=2, NotChecked=0, Total=2352 [2022-07-20 05:26:20,841 INFO L87 Difference]: Start difference. First operand 219 states and 245 transitions. Second operand has 49 states, 49 states have (on average 2.510204081632653) internal successors, (123), 49 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:21,512 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (= |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (.cse2 (select |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (and (forall ((|v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101| Int)) (let ((.cse0 (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (or (not (<= |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101| .cse0)) (and (<= (+ |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101| 1) .cse0) (<= 0 |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101|)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101|)) 0) (not (<= (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1) |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101|))))) (= 0 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (not .cse1) (<= 4 |c_ULTIMATE.start_main_~length~0#1|) (= 0 (select .cse2 (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|))) (or (not (<= 0 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (forall ((v_arrayElimArr_8 (Array Int Int)) (|v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_51| Int)) (let ((.cse3 (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (.cse4 (select (store |c_#memory_int| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_51| v_arrayElimArr_8) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (or (not (<= |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101| .cse3)) (not (= (select v_arrayElimArr_8 (+ |c_ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1)) 0)) (< |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101| (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (<= (+ |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101| 1) .cse3) (= (select .cse4 (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0) (= (select .cse4 (+ (- 1) |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101|)) 0))))) (not (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (= |c_ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1) (= |c_ULTIMATE.start_main_~length~0#1| (select |c_#length| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (= (+ (- 1) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |c_ULTIMATE.start_main_~i~0#1| 3) (<= |c_ULTIMATE.start_main_~length~0#1| 4) (or .cse1 (= (select .cse2 (+ (- 1) (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) 0)))) is different from false [2022-07-20 05:26:21,516 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (= |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (.cse1 (select |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (and (not .cse0) (= 0 (select .cse1 (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|))) (or (not (<= 0 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (forall ((v_arrayElimArr_8 (Array Int Int)) (|v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_51| Int)) (let ((.cse2 (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (.cse3 (select (store |c_#memory_int| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_51| v_arrayElimArr_8) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (or (not (<= |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101| .cse2)) (not (= (select v_arrayElimArr_8 (+ |c_ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1)) 0)) (< |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101| (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (<= (+ |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101| 1) .cse2) (= (select .cse3 (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0) (= (select .cse3 (+ (- 1) |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101|)) 0))))) (= |c_ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1) (= (+ (- 1) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0) (or .cse0 (= (select .cse1 (+ (- 1) (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) 0)))) is different from false [2022-07-20 05:26:21,597 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (= |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (.cse2 (select |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (and (forall ((|v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101| Int)) (let ((.cse0 (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (or (not (<= |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101| .cse0)) (and (<= (+ |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101| 1) .cse0) (<= 0 |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101|)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101|)) 0) (not (<= (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1) |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101|))))) (not .cse1) (= 0 (select .cse2 (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|))) (or (not (<= 0 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (forall ((v_arrayElimArr_8 (Array Int Int)) (|v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_51| Int)) (let ((.cse3 (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (.cse4 (select (store |c_#memory_int| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_51| v_arrayElimArr_8) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (or (not (<= |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101| .cse3)) (not (= (select v_arrayElimArr_8 (+ |c_ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1)) 0)) (< |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101| (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (<= (+ |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101| 1) .cse3) (= (select .cse4 (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0) (= (select .cse4 (+ (- 1) |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_101|)) 0))))) (= |c_ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1) (= (+ (- 1) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0) (or .cse1 (= (select .cse2 (+ (- 1) (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) 0)))) is different from false [2022-07-20 05:26:22,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:26:22,670 INFO L93 Difference]: Finished difference Result 289 states and 317 transitions. [2022-07-20 05:26:22,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-20 05:26:22,679 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.510204081632653) internal successors, (123), 49 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-07-20 05:26:22,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:26:22,681 INFO L225 Difference]: With dead ends: 289 [2022-07-20 05:26:22,682 INFO L226 Difference]: Without dead ends: 186 [2022-07-20 05:26:22,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=668, Invalid=6649, Unknown=5, NotChecked=510, Total=7832 [2022-07-20 05:26:22,684 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 105 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:26:22,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 810 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 469 Invalid, 0 Unknown, 222 Unchecked, 0.2s Time] [2022-07-20 05:26:22,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-07-20 05:26:22,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 169. [2022-07-20 05:26:22,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 165 states have (on average 1.121212121212121) internal successors, (185), 168 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:22,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 185 transitions. [2022-07-20 05:26:22,692 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 185 transitions. Word has length 49 [2022-07-20 05:26:22,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:26:22,692 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 185 transitions. [2022-07-20 05:26:22,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.510204081632653) internal successors, (123), 49 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:22,692 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 185 transitions. [2022-07-20 05:26:22,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-20 05:26:22,697 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:26:22,697 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:26:22,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-20 05:26:22,920 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,SelfDestructingSolverStorable48 [2022-07-20 05:26:22,920 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:26:22,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:26:22,920 INFO L85 PathProgramCache]: Analyzing trace with hash -172281339, now seen corresponding path program 6 times [2022-07-20 05:26:22,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:26:22,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409386406] [2022-07-20 05:26:22,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:26:22,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:26:22,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:26:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:26:23,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:26:23,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409386406] [2022-07-20 05:26:23,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409386406] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:26:23,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127922453] [2022-07-20 05:26:23,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:26:23,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:23,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:26:23,093 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) [2022-07-20 05:26:23,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-20 05:26:23,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-20 05:26:23,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:26:23,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-20 05:26:23,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:26:23,230 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:26:23,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:26:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:26:23,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:26:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:26:23,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127922453] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:26:23,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:26:23,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2022-07-20 05:26:23,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460661287] [2022-07-20 05:26:23,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:26:23,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-20 05:26:23,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:26:23,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-20 05:26:23,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 05:26:23,816 INFO L87 Difference]: Start difference. First operand 169 states and 185 transitions. Second operand has 33 states, 32 states have (on average 4.25) internal successors, (136), 33 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:24,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:26:24,232 INFO L93 Difference]: Finished difference Result 179 states and 195 transitions. [2022-07-20 05:26:24,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 05:26:24,232 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 4.25) internal successors, (136), 33 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-20 05:26:24,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:26:24,232 INFO L225 Difference]: With dead ends: 179 [2022-07-20 05:26:24,233 INFO L226 Difference]: Without dead ends: 179 [2022-07-20 05:26:24,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=342, Invalid=1464, Unknown=0, NotChecked=0, Total=1806 [2022-07-20 05:26:24,233 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 430 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:26:24,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 272 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:26:24,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-20 05:26:24,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 169. [2022-07-20 05:26:24,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 165 states have (on average 1.1151515151515152) internal successors, (184), 168 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:24,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 184 transitions. [2022-07-20 05:26:24,236 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 184 transitions. Word has length 52 [2022-07-20 05:26:24,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:26:24,236 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 184 transitions. [2022-07-20 05:26:24,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 4.25) internal successors, (136), 33 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:24,237 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 184 transitions. [2022-07-20 05:26:24,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-20 05:26:24,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:26:24,237 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:26:24,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-20 05:26:24,463 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,SelfDestructingSolverStorable49 [2022-07-20 05:26:24,463 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:26:24,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:26:24,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1915462492, now seen corresponding path program 4 times [2022-07-20 05:26:24,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:26:24,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079682631] [2022-07-20 05:26:24,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:26:24,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:26:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:26:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 05:26:24,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:26:24,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079682631] [2022-07-20 05:26:24,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079682631] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:26:24,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559378592] [2022-07-20 05:26:24,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:26:24,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:24,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:26:24,615 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) [2022-07-20 05:26:24,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-20 05:26:24,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:26:24,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:26:24,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-20 05:26:24,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:26:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:26:25,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:26:25,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 05:26:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 05:26:25,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559378592] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:26:25,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:26:25,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 12] total 33 [2022-07-20 05:26:25,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306019619] [2022-07-20 05:26:25,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:26:25,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-20 05:26:25,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:26:25,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-20 05:26:25,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2022-07-20 05:26:25,367 INFO L87 Difference]: Start difference. First operand 169 states and 184 transitions. Second operand has 34 states, 33 states have (on average 4.090909090909091) internal successors, (135), 34 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:25,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:26:25,857 INFO L93 Difference]: Finished difference Result 181 states and 196 transitions. [2022-07-20 05:26:25,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 05:26:25,857 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 4.090909090909091) internal successors, (135), 34 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-20 05:26:25,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:26:25,858 INFO L225 Difference]: With dead ends: 181 [2022-07-20 05:26:25,858 INFO L226 Difference]: Without dead ends: 181 [2022-07-20 05:26:25,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=395, Invalid=1861, Unknown=0, NotChecked=0, Total=2256 [2022-07-20 05:26:25,859 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 519 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:26:25,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 326 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:26:25,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-20 05:26:25,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 173. [2022-07-20 05:26:25,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 169 states have (on average 1.1124260355029585) internal successors, (188), 172 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:25,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 188 transitions. [2022-07-20 05:26:25,862 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 188 transitions. Word has length 54 [2022-07-20 05:26:25,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:26:25,862 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 188 transitions. [2022-07-20 05:26:25,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 4.090909090909091) internal successors, (135), 34 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:25,863 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 188 transitions. [2022-07-20 05:26:25,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-20 05:26:25,863 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:26:25,863 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:26:25,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-20 05:26:26,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:26,079 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:26:26,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:26:26,080 INFO L85 PathProgramCache]: Analyzing trace with hash 52598959, now seen corresponding path program 7 times [2022-07-20 05:26:26,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:26:26,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360264079] [2022-07-20 05:26:26,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:26:26,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:26:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:26:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:26:26,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:26:26,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360264079] [2022-07-20 05:26:26,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360264079] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:26:26,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595138111] [2022-07-20 05:26:26,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:26:26,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:26,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:26:26,692 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) [2022-07-20 05:26:26,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-20 05:26:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:26:26,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-20 05:26:26,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:26:26,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:26:27,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:26:27,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:26:27,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:26:27,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:26:27,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:26:27,231 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:26:27,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:26:27,240 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1144 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1144) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2022-07-20 05:26:27,250 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1144 (Array Int Int)) (v_ArrVal_1143 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1143) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1144) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2022-07-20 05:26:27,260 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1144 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1144) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2022-07-20 05:26:27,266 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1144 (Array Int Int)) (v_ArrVal_1142 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1142) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1144) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2022-07-20 05:26:27,271 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1144 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1144) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2022-07-20 05:26:27,277 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1144 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_1144) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) 0)) is different from false [2022-07-20 05:26:27,281 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:27,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:26:27,285 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:27,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-20 05:26:27,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:26:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 9 not checked. [2022-07-20 05:26:27,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595138111] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:26:27,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:26:27,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18, 18] total 44 [2022-07-20 05:26:27,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14614550] [2022-07-20 05:26:27,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:26:27,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-20 05:26:27,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:26:27,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-20 05:26:27,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1305, Unknown=6, NotChecked=462, Total=1892 [2022-07-20 05:26:27,508 INFO L87 Difference]: Start difference. First operand 173 states and 188 transitions. Second operand has 44 states, 44 states have (on average 2.522727272727273) internal successors, (111), 44 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:28,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:26:28,453 INFO L93 Difference]: Finished difference Result 174 states and 188 transitions. [2022-07-20 05:26:28,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-20 05:26:28,454 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.522727272727273) internal successors, (111), 44 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-20 05:26:28,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:26:28,454 INFO L225 Difference]: With dead ends: 174 [2022-07-20 05:26:28,454 INFO L226 Difference]: Without dead ends: 149 [2022-07-20 05:26:28,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 88 SyntacticMatches, 10 SemanticMatches, 58 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=265, Invalid=2615, Unknown=6, NotChecked=654, Total=3540 [2022-07-20 05:26:28,455 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 108 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:26:28,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 610 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 766 Invalid, 0 Unknown, 342 Unchecked, 0.3s Time] [2022-07-20 05:26:28,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-20 05:26:28,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2022-07-20 05:26:28,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 142 states have (on average 1.119718309859155) internal successors, (159), 145 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:28,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 159 transitions. [2022-07-20 05:26:28,457 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 159 transitions. Word has length 55 [2022-07-20 05:26:28,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:26:28,457 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 159 transitions. [2022-07-20 05:26:28,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.522727272727273) internal successors, (111), 44 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:28,458 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 159 transitions. [2022-07-20 05:26:28,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-20 05:26:28,458 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:26:28,458 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:26:28,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-20 05:26:28,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:28,679 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:26:28,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:26:28,680 INFO L85 PathProgramCache]: Analyzing trace with hash 750204906, now seen corresponding path program 3 times [2022-07-20 05:26:28,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:26:28,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083040994] [2022-07-20 05:26:28,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:26:28,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:26:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:26:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 05:26:28,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:26:28,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083040994] [2022-07-20 05:26:28,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083040994] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:26:28,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066964100] [2022-07-20 05:26:28,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:26:28,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:28,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:26:28,868 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) [2022-07-20 05:26:28,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-20 05:26:29,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-20 05:26:29,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:26:29,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-20 05:26:29,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:26:29,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:26:29,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:26:29,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:26:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:26:29,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:26:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 05:26:29,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066964100] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:26:29,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:26:29,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 35 [2022-07-20 05:26:29,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790582761] [2022-07-20 05:26:29,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:26:29,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-20 05:26:29,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:26:29,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-20 05:26:29,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1103, Unknown=0, NotChecked=0, Total=1260 [2022-07-20 05:26:29,777 INFO L87 Difference]: Start difference. First operand 146 states and 159 transitions. Second operand has 36 states, 35 states have (on average 3.914285714285714) internal successors, (137), 36 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:30,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:26:30,414 INFO L93 Difference]: Finished difference Result 187 states and 198 transitions. [2022-07-20 05:26:30,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-20 05:26:30,415 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.914285714285714) internal successors, (137), 36 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-20 05:26:30,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:26:30,415 INFO L225 Difference]: With dead ends: 187 [2022-07-20 05:26:30,416 INFO L226 Difference]: Without dead ends: 187 [2022-07-20 05:26:30,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=411, Invalid=2039, Unknown=0, NotChecked=0, Total=2450 [2022-07-20 05:26:30,416 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 552 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:26:30,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 548 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:26:30,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-07-20 05:26:30,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 150. [2022-07-20 05:26:30,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 146 states have (on average 1.1027397260273972) internal successors, (161), 149 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) [2022-07-20 05:26:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 161 transitions. [2022-07-20 05:26:30,419 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 161 transitions. Word has length 55 [2022-07-20 05:26:30,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:26:30,420 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 161 transitions. [2022-07-20 05:26:30,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.914285714285714) internal successors, (137), 36 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:30,420 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 161 transitions. [2022-07-20 05:26:30,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-20 05:26:30,421 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:26:30,421 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:26:30,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-20 05:26:30,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:30,643 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:26:30,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:26:30,644 INFO L85 PathProgramCache]: Analyzing trace with hash 221172411, now seen corresponding path program 5 times [2022-07-20 05:26:30,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:26:30,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928757870] [2022-07-20 05:26:30,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:26:30,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:26:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:26:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 36 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 05:26:30,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:26:30,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928757870] [2022-07-20 05:26:30,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928757870] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:26:30,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022701501] [2022-07-20 05:26:30,796 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:26:30,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:30,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:26:30,797 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) [2022-07-20 05:26:30,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-20 05:26:31,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-20 05:26:31,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:26:31,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-20 05:26:31,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:26:31,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:26:31,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:26:31,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:26:31,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:26:31,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:26:31,605 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-20 05:26:31,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-20 05:26:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 05:26:31,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:26:31,678 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1265 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1265) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2022-07-20 05:26:31,682 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1265 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1265) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2022-07-20 05:26:31,689 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1265 (Array Int Int)) (v_ArrVal_1264 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1264) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1265) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2022-07-20 05:26:31,695 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1265 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1265) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2022-07-20 05:26:31,700 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1265 (Array Int Int)) (v_ArrVal_1263 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1263) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1265) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2022-07-20 05:26:31,705 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1265 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1265) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2022-07-20 05:26:31,711 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1265 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_1265) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) 0)) is different from false [2022-07-20 05:26:31,715 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:31,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:26:31,719 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:31,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-20 05:26:31,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:26:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 29 not checked. [2022-07-20 05:26:31,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022701501] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:26:31,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:26:31,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 18] total 40 [2022-07-20 05:26:31,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074677546] [2022-07-20 05:26:31,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:26:31,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-20 05:26:31,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:26:31,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-20 05:26:31,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=983, Unknown=7, NotChecked=476, Total=1560 [2022-07-20 05:26:31,931 INFO L87 Difference]: Start difference. First operand 150 states and 161 transitions. Second operand has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:32,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:26:32,998 INFO L93 Difference]: Finished difference Result 227 states and 239 transitions. [2022-07-20 05:26:32,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-20 05:26:32,998 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-20 05:26:32,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:26:32,999 INFO L225 Difference]: With dead ends: 227 [2022-07-20 05:26:32,999 INFO L226 Difference]: Without dead ends: 223 [2022-07-20 05:26:32,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 91 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 7 IntricatePredicates, 4 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=267, Invalid=3293, Unknown=8, NotChecked=854, Total=4422 [2022-07-20 05:26:33,000 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 139 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 971 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:26:33,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 829 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 699 Invalid, 0 Unknown, 971 Unchecked, 0.3s Time] [2022-07-20 05:26:33,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-20 05:26:33,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 173. [2022-07-20 05:26:33,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 169 states have (on average 1.0887573964497042) internal successors, (184), 172 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:33,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 184 transitions. [2022-07-20 05:26:33,002 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 184 transitions. Word has length 59 [2022-07-20 05:26:33,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:26:33,003 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 184 transitions. [2022-07-20 05:26:33,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:33,003 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 184 transitions. [2022-07-20 05:26:33,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-20 05:26:33,004 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:26:33,004 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:26:33,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-20 05:26:33,223 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,SelfDestructingSolverStorable53 [2022-07-20 05:26:33,223 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:26:33,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:26:33,224 INFO L85 PathProgramCache]: Analyzing trace with hash 257915321, now seen corresponding path program 8 times [2022-07-20 05:26:33,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:26:33,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466636160] [2022-07-20 05:26:33,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:26:33,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:26:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:26:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:26:34,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:26:34,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466636160] [2022-07-20 05:26:34,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466636160] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:26:34,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648660255] [2022-07-20 05:26:34,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:26:34,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:34,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:26:34,007 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) [2022-07-20 05:26:34,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-20 05:26:34,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:26:34,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:26:34,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-20 05:26:34,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:26:34,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:26:34,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:26:34,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:26:34,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:26:34,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:26:35,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:26:35,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:26:35,263 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:35,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-07-20 05:26:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 05:26:35,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:26:36,142 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1332 (Array Int Int)) (|v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_104| Int)) (or (not (<= |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_104| |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (<= (+ 5 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_104|) (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1332) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_104|)) 0) (not (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_104|)))) is different from false [2022-07-20 05:26:36,165 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1332 (Array Int Int)) (|v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_104| Int)) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_1332) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ 3 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_104|)) 0) (< |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_104|) (<= (+ 5 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_104|) (select |c_#length| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (not (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_104|)))) is different from false [2022-07-20 05:26:36,171 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:36,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:26:36,178 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:36,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-20 05:26:36,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:26:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 6 not checked. [2022-07-20 05:26:36,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648660255] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:26:36,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:26:36,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 19, 19] total 64 [2022-07-20 05:26:36,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612872384] [2022-07-20 05:26:36,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:26:36,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-20 05:26:36,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:26:36,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-20 05:26:36,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=3525, Unknown=6, NotChecked=242, Total=4032 [2022-07-20 05:26:36,924 INFO L87 Difference]: Start difference. First operand 173 states and 184 transitions. Second operand has 64 states, 64 states have (on average 2.484375) internal successors, (159), 64 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:39,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:26:39,576 INFO L93 Difference]: Finished difference Result 221 states and 232 transitions. [2022-07-20 05:26:39,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-20 05:26:39,576 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.484375) internal successors, (159), 64 states have internal predecessors, (159), 0 states have call successors, (0), 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 61 [2022-07-20 05:26:39,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:26:39,577 INFO L225 Difference]: With dead ends: 221 [2022-07-20 05:26:39,577 INFO L226 Difference]: Without dead ends: 194 [2022-07-20 05:26:39,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 1408 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=841, Invalid=8473, Unknown=6, NotChecked=382, Total=9702 [2022-07-20 05:26:39,578 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 299 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 544 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:26:39,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 958 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 673 Invalid, 0 Unknown, 544 Unchecked, 0.3s Time] [2022-07-20 05:26:39,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-07-20 05:26:39,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 153. [2022-07-20 05:26:39,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 149 states have (on average 1.1006711409395973) internal successors, (164), 152 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) [2022-07-20 05:26:39,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 164 transitions. [2022-07-20 05:26:39,581 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 164 transitions. Word has length 61 [2022-07-20 05:26:39,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:26:39,582 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 164 transitions. [2022-07-20 05:26:39,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.484375) internal successors, (159), 64 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:39,582 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 164 transitions. [2022-07-20 05:26:39,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 05:26:39,583 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:26:39,583 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:26:39,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-20 05:26:39,787 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,SelfDestructingSolverStorable54 [2022-07-20 05:26:39,787 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:26:39,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:26:39,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1306777250, now seen corresponding path program 9 times [2022-07-20 05:26:39,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:26:39,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923331959] [2022-07-20 05:26:39,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:26:39,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:26:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:26:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:26:40,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:26:40,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923331959] [2022-07-20 05:26:40,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923331959] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:26:40,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242860254] [2022-07-20 05:26:40,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:26:40,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:40,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:26:40,196 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) [2022-07-20 05:26:40,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-20 05:26:40,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-20 05:26:40,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:26:40,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-20 05:26:40,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:26:40,400 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:26:40,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:26:40,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:26:40,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:26:40,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:26:40,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:26:40,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:26:41,011 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:41,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-07-20 05:26:41,113 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-20 05:26:41,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:26:41,671 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:41,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:26:41,678 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:41,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-20 05:26:41,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:26:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 10 refuted. 2 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-20 05:26:41,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242860254] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:26:41,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:26:41,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 10, 11] total 42 [2022-07-20 05:26:41,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150129683] [2022-07-20 05:26:41,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:26:41,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-20 05:26:41,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:26:41,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-20 05:26:41,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1577, Unknown=28, NotChecked=0, Total=1722 [2022-07-20 05:26:41,953 INFO L87 Difference]: Start difference. First operand 153 states and 164 transitions. Second operand has 42 states, 42 states have (on average 3.0238095238095237) internal successors, (127), 42 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:43,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:26:43,110 INFO L93 Difference]: Finished difference Result 247 states and 262 transitions. [2022-07-20 05:26:43,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-20 05:26:43,110 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.0238095238095237) internal successors, (127), 42 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-20 05:26:43,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:26:43,111 INFO L225 Difference]: With dead ends: 247 [2022-07-20 05:26:43,111 INFO L226 Difference]: Without dead ends: 124 [2022-07-20 05:26:43,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=371, Invalid=4571, Unknown=28, NotChecked=0, Total=4970 [2022-07-20 05:26:43,112 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 59 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:26:43,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 705 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 419 Invalid, 0 Unknown, 113 Unchecked, 0.2s Time] [2022-07-20 05:26:43,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-20 05:26:43,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 83. [2022-07-20 05:26:43,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 79 states have (on average 1.0886075949367089) internal successors, (86), 82 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:43,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2022-07-20 05:26:43,114 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 62 [2022-07-20 05:26:43,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:26:43,114 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2022-07-20 05:26:43,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.0238095238095237) internal successors, (127), 42 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:43,115 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2022-07-20 05:26:43,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-20 05:26:43,115 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:26:43,115 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:26:43,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-20 05:26:43,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:43,330 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:26:43,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:26:43,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1438635519, now seen corresponding path program 6 times [2022-07-20 05:26:43,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:26:43,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249977494] [2022-07-20 05:26:43,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:26:43,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:26:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:26:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 64 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 05:26:43,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:26:43,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249977494] [2022-07-20 05:26:43,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249977494] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:26:43,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972476433] [2022-07-20 05:26:43,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:26:43,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:43,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:26:43,524 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) [2022-07-20 05:26:43,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-20 05:26:43,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-20 05:26:43,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:26:43,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-20 05:26:43,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:26:43,788 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:26:43,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:26:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 05:26:44,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:26:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 05:26:44,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972476433] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:26:44,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:26:44,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2022-07-20 05:26:44,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708217069] [2022-07-20 05:26:44,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:26:44,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-20 05:26:44,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:26:44,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-20 05:26:44,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2022-07-20 05:26:44,649 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 38 states, 37 states have (on average 4.243243243243243) internal successors, (157), 38 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) [2022-07-20 05:26:45,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:26:45,290 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2022-07-20 05:26:45,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 05:26:45,290 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 4.243243243243243) internal successors, (157), 38 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-20 05:26:45,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:26:45,291 INFO L225 Difference]: With dead ends: 88 [2022-07-20 05:26:45,291 INFO L226 Difference]: Without dead ends: 88 [2022-07-20 05:26:45,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=546, Invalid=2210, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 05:26:45,291 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 470 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:26:45,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 224 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:26:45,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-20 05:26:45,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2022-07-20 05:26:45,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 80 states have (on average 1.0875) internal successors, (87), 83 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:45,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2022-07-20 05:26:45,293 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 67 [2022-07-20 05:26:45,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:26:45,293 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2022-07-20 05:26:45,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 4.243243243243243) internal successors, (157), 38 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) [2022-07-20 05:26:45,293 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2022-07-20 05:26:45,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-20 05:26:45,293 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:26:45,294 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:26:45,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-20 05:26:45,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:45,495 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:26:45,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:26:45,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1648028115, now seen corresponding path program 4 times [2022-07-20 05:26:45,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:26:45,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625167141] [2022-07-20 05:26:45,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:26:45,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:26:45,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:26:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 6 proven. 68 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 05:26:45,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:26:45,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625167141] [2022-07-20 05:26:45,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625167141] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:26:45,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047083230] [2022-07-20 05:26:45,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:26:45,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:45,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:26:45,688 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) [2022-07-20 05:26:45,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-20 05:26:45,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:26:45,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:26:45,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-20 05:26:45,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:26:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 15 proven. 81 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:26:46,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:26:46,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 05:26:46,570 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 05:26:46,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047083230] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:26:46,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:26:46,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 14] total 37 [2022-07-20 05:26:46,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509547199] [2022-07-20 05:26:46,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:26:46,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-20 05:26:46,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:26:46,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-20 05:26:46,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2022-07-20 05:26:46,572 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 38 states, 37 states have (on average 3.918918918918919) internal successors, (145), 38 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) [2022-07-20 05:26:47,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:26:47,154 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2022-07-20 05:26:47,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 05:26:47,154 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.918918918918919) internal successors, (145), 38 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 68 [2022-07-20 05:26:47,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:26:47,155 INFO L225 Difference]: With dead ends: 86 [2022-07-20 05:26:47,155 INFO L226 Difference]: Without dead ends: 83 [2022-07-20 05:26:47,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=474, Invalid=2178, Unknown=0, NotChecked=0, Total=2652 [2022-07-20 05:26:47,156 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 324 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:26:47,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 461 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:26:47,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-20 05:26:47,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-07-20 05:26:47,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 78 states have (on average 1.0769230769230769) internal successors, (84), 81 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:47,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2022-07-20 05:26:47,157 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 68 [2022-07-20 05:26:47,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:26:47,157 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2022-07-20 05:26:47,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.918918918918919) internal successors, (145), 38 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) [2022-07-20 05:26:47,157 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2022-07-20 05:26:47,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-20 05:26:47,158 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:26:47,158 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:26:47,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-20 05:26:47,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:47,372 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:26:47,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:26:47,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1808652158, now seen corresponding path program 7 times [2022-07-20 05:26:47,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:26:47,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679739469] [2022-07-20 05:26:47,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:26:47,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:26:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:26:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 26 proven. 66 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-20 05:26:47,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:26:47,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679739469] [2022-07-20 05:26:47,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679739469] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:26:47,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639903412] [2022-07-20 05:26:47,608 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:26:47,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:47,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:26:47,612 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) [2022-07-20 05:26:47,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-20 05:26:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:26:47,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-20 05:26:47,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:26:47,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:26:48,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:26:48,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:26:48,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:26:48,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:26:48,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:26:48,533 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-20 05:26:48,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-20 05:26:48,559 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 15 proven. 78 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 05:26:48,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:26:48,617 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1607 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1607) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2022-07-20 05:26:48,622 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1607 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1607) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2022-07-20 05:26:48,628 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1607 (Array Int Int)) (v_ArrVal_1606 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1606) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1607) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2022-07-20 05:26:48,633 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1607 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1607) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2022-07-20 05:26:48,639 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1607 (Array Int Int)) (v_ArrVal_1605 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1605) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1607) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2022-07-20 05:26:48,644 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1607 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1607) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2022-07-20 05:26:48,650 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1604 (Array Int Int)) (v_ArrVal_1607 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1604) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1607) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2022-07-20 05:26:48,655 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1607 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1607) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2022-07-20 05:26:48,661 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1607 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_1607) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) 0)) is different from false [2022-07-20 05:26:48,665 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:48,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:26:48,669 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:26:48,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-20 05:26:48,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:26:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 28 trivial. 49 not checked. [2022-07-20 05:26:48,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639903412] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:26:48,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:26:48,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21, 21] total 48 [2022-07-20 05:26:48,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072860502] [2022-07-20 05:26:48,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:26:48,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-20 05:26:48,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:26:48,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-20 05:26:48,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1398, Unknown=9, NotChecked=738, Total=2256 [2022-07-20 05:26:48,889 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 48 states, 48 states have (on average 3.0) internal successors, (144), 48 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:50,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:26:50,367 INFO L93 Difference]: Finished difference Result 202 states and 205 transitions. [2022-07-20 05:26:50,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-20 05:26:50,368 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0) internal successors, (144), 48 states have internal predecessors, (144), 0 states have call successors, (0), 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 72 [2022-07-20 05:26:50,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:26:50,368 INFO L225 Difference]: With dead ends: 202 [2022-07-20 05:26:50,368 INFO L226 Difference]: Without dead ends: 96 [2022-07-20 05:26:50,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 111 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 9 IntricatePredicates, 8 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=333, Invalid=5094, Unknown=11, NotChecked=1368, Total=6806 [2022-07-20 05:26:50,369 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 93 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 828 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:26:50,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 899 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 699 Invalid, 0 Unknown, 828 Unchecked, 0.3s Time] [2022-07-20 05:26:50,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-20 05:26:50,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2022-07-20 05:26:50,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 86 states have (on average 1.069767441860465) internal successors, (92), 89 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) [2022-07-20 05:26:50,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2022-07-20 05:26:50,371 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 72 [2022-07-20 05:26:50,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:26:50,371 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2022-07-20 05:26:50,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0) internal successors, (144), 48 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:50,372 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2022-07-20 05:26:50,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-20 05:26:50,372 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:26:50,372 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:26:50,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-20 05:26:50,579 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,SelfDestructingSolverStorable58 [2022-07-20 05:26:50,579 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:26:50,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:26:50,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1747935736, now seen corresponding path program 8 times [2022-07-20 05:26:50,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:26:50,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093565145] [2022-07-20 05:26:50,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:26:50,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:26:50,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:26:50,799 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 05:26:50,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:26:50,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093565145] [2022-07-20 05:26:50,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093565145] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:26:50,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946167749] [2022-07-20 05:26:50,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:26:50,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:50,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:26:50,801 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) [2022-07-20 05:26:50,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-20 05:26:50,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:26:50,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:26:50,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-20 05:26:50,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:26:50,960 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:26:50,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:26:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 05:26:51,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:26:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 65 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 05:26:51,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946167749] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:26:51,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:26:51,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2022-07-20 05:26:51,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696032295] [2022-07-20 05:26:51,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:26:51,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-20 05:26:51,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:26:51,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-20 05:26:51,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1674, Unknown=0, NotChecked=0, Total=1892 [2022-07-20 05:26:51,958 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 44 states, 43 states have (on average 4.27906976744186) internal successors, (184), 44 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:52,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:26:52,801 INFO L93 Difference]: Finished difference Result 102 states and 105 transitions. [2022-07-20 05:26:52,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-20 05:26:52,801 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 4.27906976744186) internal successors, (184), 44 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-07-20 05:26:52,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:26:52,802 INFO L225 Difference]: With dead ends: 102 [2022-07-20 05:26:52,802 INFO L226 Difference]: Without dead ends: 102 [2022-07-20 05:26:52,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=688, Invalid=3094, Unknown=0, NotChecked=0, Total=3782 [2022-07-20 05:26:52,802 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 357 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:26:52,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 441 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:26:52,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-20 05:26:52,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2022-07-20 05:26:52,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 90 states have (on average 1.0777777777777777) internal successors, (97), 93 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:52,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2022-07-20 05:26:52,804 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 80 [2022-07-20 05:26:52,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:26:52,804 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2022-07-20 05:26:52,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 4.27906976744186) internal successors, (184), 44 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:52,804 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2022-07-20 05:26:52,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-20 05:26:52,805 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:26:52,805 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:26:52,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-20 05:26:53,015 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,SelfDestructingSolverStorable59 [2022-07-20 05:26:53,015 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:26:53,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:26:53,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1648567018, now seen corresponding path program 5 times [2022-07-20 05:26:53,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:26:53,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227747431] [2022-07-20 05:26:53,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:26:53,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:26:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:26:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 15 proven. 100 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 05:26:53,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:26:53,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227747431] [2022-07-20 05:26:53,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227747431] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:26:53,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882978794] [2022-07-20 05:26:53,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:26:53,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:53,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:26:53,258 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) [2022-07-20 05:26:53,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-20 05:26:54,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-20 05:26:54,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:26:54,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-20 05:26:54,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:26:54,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:26:54,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:26:54,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:26:54,476 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 28 proven. 87 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 05:26:54,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:26:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 45 proven. 70 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 05:26:55,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882978794] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:26:55,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:26:55,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 43 [2022-07-20 05:26:55,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575856689] [2022-07-20 05:26:55,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:26:55,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-20 05:26:55,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:26:55,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-20 05:26:55,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1668, Unknown=0, NotChecked=0, Total=1892 [2022-07-20 05:26:55,027 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 44 states, 43 states have (on average 4.255813953488372) internal successors, (183), 44 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:55,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:26:55,651 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2022-07-20 05:26:55,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 05:26:55,651 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 4.255813953488372) internal successors, (183), 44 states have internal predecessors, (183), 0 states have call successors, (0), 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 81 [2022-07-20 05:26:55,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:26:55,651 INFO L225 Difference]: With dead ends: 102 [2022-07-20 05:26:55,652 INFO L226 Difference]: Without dead ends: 102 [2022-07-20 05:26:55,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=666, Invalid=2874, Unknown=0, NotChecked=0, Total=3540 [2022-07-20 05:26:55,652 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 235 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:26:55,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 386 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:26:55,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-20 05:26:55,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2022-07-20 05:26:55,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 94 states have (on average 1.074468085106383) internal successors, (101), 97 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:55,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2022-07-20 05:26:55,654 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 81 [2022-07-20 05:26:55,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:26:55,654 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2022-07-20 05:26:55,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 4.255813953488372) internal successors, (183), 44 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:55,655 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2022-07-20 05:26:55,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-20 05:26:55,655 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:26:55,655 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:26:55,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-20 05:26:55,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:55,880 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:26:55,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:26:55,880 INFO L85 PathProgramCache]: Analyzing trace with hash 451885199, now seen corresponding path program 2 times [2022-07-20 05:26:55,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:26:55,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811987750] [2022-07-20 05:26:55,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:26:55,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:26:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:26:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 15 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 05:26:56,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:26:56,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811987750] [2022-07-20 05:26:56,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811987750] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:26:56,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081879524] [2022-07-20 05:26:56,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:26:56,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:56,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:26:56,104 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) [2022-07-20 05:26:56,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-20 05:26:56,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:26:56,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:26:56,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-20 05:26:56,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:26:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 05:26:56,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:26:56,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-20 05:26:56,977 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 05:26:56,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081879524] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:26:56,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:26:56,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 33 [2022-07-20 05:26:56,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642628958] [2022-07-20 05:26:56,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:26:56,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-20 05:26:56,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:26:56,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-20 05:26:56,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2022-07-20 05:26:56,979 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand has 34 states, 33 states have (on average 4.181818181818182) internal successors, (138), 34 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:57,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:26:57,513 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2022-07-20 05:26:57,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 05:26:57,514 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 4.181818181818182) internal successors, (138), 34 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-07-20 05:26:57,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:26:57,514 INFO L225 Difference]: With dead ends: 100 [2022-07-20 05:26:57,514 INFO L226 Difference]: Without dead ends: 95 [2022-07-20 05:26:57,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=379, Invalid=1783, Unknown=0, NotChecked=0, Total=2162 [2022-07-20 05:26:57,515 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 455 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:26:57,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 387 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:26:57,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-20 05:26:57,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-07-20 05:26:57,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 1.065934065934066) internal successors, (97), 94 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:57,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2022-07-20 05:26:57,517 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 84 [2022-07-20 05:26:57,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:26:57,517 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2022-07-20 05:26:57,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 4.181818181818182) internal successors, (138), 34 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:26:57,517 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2022-07-20 05:26:57,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-20 05:26:57,518 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:26:57,518 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:26:57,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-20 05:26:57,735 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,SelfDestructingSolverStorable61 [2022-07-20 05:26:57,735 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:26:57,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:26:57,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1958346265, now seen corresponding path program 9 times [2022-07-20 05:26:57,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:26:57,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971714636] [2022-07-20 05:26:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:26:57,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:26:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:26:57,979 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 32 proven. 105 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-20 05:26:57,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:26:57,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971714636] [2022-07-20 05:26:57,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971714636] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:26:57,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553336107] [2022-07-20 05:26:57,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:26:57,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:26:57,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:26:57,981 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) [2022-07-20 05:26:57,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-20 05:26:58,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-20 05:26:58,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:26:58,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 169 conjunts are in the unsatisfiable core [2022-07-20 05:26:58,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:26:58,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:26:58,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:26:59,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:26:59,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:26:59,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:26:59,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:27:00,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:27:00,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:27:00,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:27:00,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-20 05:27:00,463 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 18 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:27:00,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:27:01,412 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:27:01,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:27:01,418 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:27:01,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-20 05:27:01,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:27:02,685 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 18 proven. 136 refuted. 29 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:27:02,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553336107] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:27:02,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:27:02,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 33, 33] total 78 [2022-07-20 05:27:02,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062206698] [2022-07-20 05:27:02,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:27:02,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-07-20 05:27:02,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:02,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-07-20 05:27:02,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=5598, Unknown=34, NotChecked=0, Total=6006 [2022-07-20 05:27:02,687 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 78 states, 78 states have (on average 2.871794871794872) internal successors, (224), 78 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:27:05,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:05,335 INFO L93 Difference]: Finished difference Result 234 states and 237 transitions. [2022-07-20 05:27:05,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-20 05:27:05,335 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.871794871794872) internal successors, (224), 78 states have internal predecessors, (224), 0 states have call successors, (0), 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 85 [2022-07-20 05:27:05,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:05,336 INFO L225 Difference]: With dead ends: 234 [2022-07-20 05:27:05,336 INFO L226 Difference]: Without dead ends: 109 [2022-07-20 05:27:05,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2327 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=863, Invalid=12909, Unknown=34, NotChecked=0, Total=13806 [2022-07-20 05:27:05,337 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 215 mSDsluCounter, 1281 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1311 SdHoareTripleChecker+Invalid, 2290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 540 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:05,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 1311 Invalid, 2290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1691 Invalid, 0 Unknown, 540 Unchecked, 0.7s Time] [2022-07-20 05:27:05,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-20 05:27:05,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2022-07-20 05:27:05,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 99 states have (on average 1.0606060606060606) internal successors, (105), 102 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:27:05,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2022-07-20 05:27:05,338 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 85 [2022-07-20 05:27:05,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:05,338 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2022-07-20 05:27:05,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.871794871794872) internal successors, (224), 78 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:27:05,339 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2022-07-20 05:27:05,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-20 05:27:05,339 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:05,339 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:05,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-20 05:27:05,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:27:05,563 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:27:05,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:05,564 INFO L85 PathProgramCache]: Analyzing trace with hash -626365011, now seen corresponding path program 10 times [2022-07-20 05:27:05,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:05,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924191821] [2022-07-20 05:27:05,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:05,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 28 proven. 131 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-20 05:27:05,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:05,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924191821] [2022-07-20 05:27:05,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924191821] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:27:05,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868420183] [2022-07-20 05:27:05,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:27:05,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:27:05,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:27:05,859 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) [2022-07-20 05:27:05,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-20 05:27:06,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:27:06,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:27:06,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 90 conjunts are in the unsatisfiable core [2022-07-20 05:27:06,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:27:06,350 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:27:06,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:27:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 45 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:27:07,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:27:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 66 proven. 114 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 05:27:07,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868420183] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:27:07,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:27:07,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25, 19] total 60 [2022-07-20 05:27:07,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875818233] [2022-07-20 05:27:07,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:27:07,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-20 05:27:07,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:07,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-20 05:27:07,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=3244, Unknown=0, NotChecked=0, Total=3660 [2022-07-20 05:27:07,896 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 61 states, 60 states have (on average 3.9166666666666665) internal successors, (235), 61 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:27:09,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:09,816 INFO L93 Difference]: Finished difference Result 181 states and 186 transitions. [2022-07-20 05:27:09,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-20 05:27:09,816 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 3.9166666666666665) internal successors, (235), 61 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-07-20 05:27:09,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:09,817 INFO L225 Difference]: With dead ends: 181 [2022-07-20 05:27:09,817 INFO L226 Difference]: Without dead ends: 181 [2022-07-20 05:27:09,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2341 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1705, Invalid=8195, Unknown=0, NotChecked=0, Total=9900 [2022-07-20 05:27:09,818 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 722 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:09,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 693 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1551 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 05:27:09,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-20 05:27:09,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 107. [2022-07-20 05:27:09,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 103 states have (on average 1.0679611650485437) internal successors, (110), 106 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:27:09,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2022-07-20 05:27:09,820 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 93 [2022-07-20 05:27:09,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:09,821 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2022-07-20 05:27:09,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 3.9166666666666665) internal successors, (235), 61 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:27:09,821 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2022-07-20 05:27:09,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-20 05:27:09,822 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:09,822 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:09,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-20 05:27:10,022 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,SelfDestructingSolverStorable63 [2022-07-20 05:27:10,022 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:27:10,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:10,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2057521153, now seen corresponding path program 6 times [2022-07-20 05:27:10,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:10,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915581135] [2022-07-20 05:27:10,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:10,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 28 proven. 137 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-20 05:27:10,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:10,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915581135] [2022-07-20 05:27:10,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915581135] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:27:10,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865053699] [2022-07-20 05:27:10,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:27:10,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:27:10,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:27:10,312 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) [2022-07-20 05:27:10,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-20 05:27:10,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-20 05:27:10,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:27:10,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-20 05:27:10,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:27:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 45 proven. 120 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-20 05:27:11,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:27:11,603 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 [2022-07-20 05:27:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 45 proven. 120 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-20 05:27:11,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865053699] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:27:11,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:27:11,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 46 [2022-07-20 05:27:11,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396305101] [2022-07-20 05:27:11,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:27:11,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-20 05:27:11,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:11,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-20 05:27:11,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1878, Unknown=0, NotChecked=0, Total=2162 [2022-07-20 05:27:11,642 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand has 47 states, 46 states have (on average 3.9565217391304346) internal successors, (182), 47 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:27:12,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:12,366 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2022-07-20 05:27:12,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-20 05:27:12,367 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 3.9565217391304346) internal successors, (182), 47 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-07-20 05:27:12,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:12,367 INFO L225 Difference]: With dead ends: 115 [2022-07-20 05:27:12,367 INFO L226 Difference]: Without dead ends: 115 [2022-07-20 05:27:12,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=829, Invalid=3331, Unknown=0, NotChecked=0, Total=4160 [2022-07-20 05:27:12,368 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 284 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:12,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 514 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:27:12,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-20 05:27:12,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2022-07-20 05:27:12,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 107 states have (on average 1.0654205607476634) internal successors, (114), 110 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:27:12,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2022-07-20 05:27:12,371 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 94 [2022-07-20 05:27:12,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:12,371 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2022-07-20 05:27:12,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 3.9565217391304346) internal successors, (182), 47 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:27:12,371 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2022-07-20 05:27:12,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-20 05:27:12,372 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:12,372 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:12,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-20 05:27:12,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:27:12,587 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:27:12,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:12,588 INFO L85 PathProgramCache]: Analyzing trace with hash 2095276484, now seen corresponding path program 3 times [2022-07-20 05:27:12,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:12,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961408148] [2022-07-20 05:27:12,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:12,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 28 proven. 125 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-20 05:27:12,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:12,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961408148] [2022-07-20 05:27:12,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961408148] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:27:12,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067235710] [2022-07-20 05:27:12,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:27:12,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:27:12,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:27:12,868 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) [2022-07-20 05:27:12,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-20 05:27:13,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-20 05:27:13,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:27:13,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-20 05:27:13,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:27:13,529 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:27:13,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:27:14,236 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 45 proven. 108 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-20 05:27:14,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:27:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 66 proven. 87 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-20 05:27:14,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067235710] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:27:14,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:27:14,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 50 [2022-07-20 05:27:14,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087164924] [2022-07-20 05:27:14,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:27:14,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-20 05:27:14,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:14,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-20 05:27:14,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=2256, Unknown=0, NotChecked=0, Total=2550 [2022-07-20 05:27:14,970 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand has 51 states, 50 states have (on average 4.46) internal successors, (223), 51 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:27:16,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:16,103 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2022-07-20 05:27:16,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 05:27:16,104 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 4.46) internal successors, (223), 51 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2022-07-20 05:27:16,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:16,104 INFO L225 Difference]: With dead ends: 113 [2022-07-20 05:27:16,105 INFO L226 Difference]: Without dead ends: 108 [2022-07-20 05:27:16,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=922, Invalid=4190, Unknown=0, NotChecked=0, Total=5112 [2022-07-20 05:27:16,105 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 569 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:16,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [569 Valid, 506 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:27:16,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-20 05:27:16,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-07-20 05:27:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 104 states have (on average 1.0576923076923077) internal successors, (110), 107 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:27:16,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2022-07-20 05:27:16,108 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 97 [2022-07-20 05:27:16,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:16,108 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2022-07-20 05:27:16,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 4.46) internal successors, (223), 51 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:27:16,108 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2022-07-20 05:27:16,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-20 05:27:16,109 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:16,109 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:16,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-20 05:27:16,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:27:16,324 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:27:16,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:16,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1742143314, now seen corresponding path program 11 times [2022-07-20 05:27:16,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:16,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537578409] [2022-07-20 05:27:16,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:16,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:16,583 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 38 proven. 153 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-20 05:27:16,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:16,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537578409] [2022-07-20 05:27:16,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537578409] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:27:16,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336564114] [2022-07-20 05:27:16,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:27:16,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:27:16,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:27:16,586 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) [2022-07-20 05:27:16,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-20 05:27:17,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-20 05:27:17,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:27:17,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 137 conjunts are in the unsatisfiable core [2022-07-20 05:27:17,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:27:17,719 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:27:17,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:27:17,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:27:18,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:27:18,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:27:18,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:27:18,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:27:18,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:27:18,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:27:18,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:27:18,980 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:27:18,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-07-20 05:27:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 45 proven. 147 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-20 05:27:19,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:27:20,332 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:27:20,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:27:20,339 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:27:20,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-20 05:27:20,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:27:21,086 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 66 proven. 126 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-20 05:27:21,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336564114] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:27:21,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:27:21,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26, 26] total 69 [2022-07-20 05:27:21,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784953201] [2022-07-20 05:27:21,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:27:21,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-07-20 05:27:21,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:21,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-07-20 05:27:21,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=4339, Unknown=5, NotChecked=0, Total=4692 [2022-07-20 05:27:21,088 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 69 states, 69 states have (on average 3.2753623188405796) internal successors, (226), 69 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:27:23,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:23,223 INFO L93 Difference]: Finished difference Result 163 states and 166 transitions. [2022-07-20 05:27:23,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-20 05:27:23,224 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.2753623188405796) internal successors, (226), 69 states have internal predecessors, (226), 0 states have call successors, (0), 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 98 [2022-07-20 05:27:23,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:23,224 INFO L225 Difference]: With dead ends: 163 [2022-07-20 05:27:23,224 INFO L226 Difference]: Without dead ends: 127 [2022-07-20 05:27:23,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1908 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1071, Invalid=11580, Unknown=5, NotChecked=0, Total=12656 [2022-07-20 05:27:23,225 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 157 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 2189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1031 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:23,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 1008 Invalid, 2189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1138 Invalid, 0 Unknown, 1031 Unchecked, 0.4s Time] [2022-07-20 05:27:23,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-20 05:27:23,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 116. [2022-07-20 05:27:23,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 112 states have (on average 1.0625) internal successors, (119), 115 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:27:23,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 119 transitions. [2022-07-20 05:27:23,227 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 119 transitions. Word has length 98 [2022-07-20 05:27:23,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:23,228 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 119 transitions. [2022-07-20 05:27:23,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.2753623188405796) internal successors, (226), 69 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:27:23,228 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 119 transitions. [2022-07-20 05:27:23,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-20 05:27:23,228 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:23,229 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:23,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-20 05:27:23,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-07-20 05:27:23,429 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:27:23,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:23,430 INFO L85 PathProgramCache]: Analyzing trace with hash 676347391, now seen corresponding path program 7 times [2022-07-20 05:27:23,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:23,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780359912] [2022-07-20 05:27:23,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:23,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:23,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 45 proven. 179 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-20 05:27:23,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:23,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780359912] [2022-07-20 05:27:23,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780359912] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:27:23,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802591514] [2022-07-20 05:27:23,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:27:23,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:27:23,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:27:23,752 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:27:23,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-20 05:27:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:24,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-20 05:27:24,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:27:24,020 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:27:24,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:27:24,559 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 120 proven. 79 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-20 05:27:24,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:27:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 112 proven. 87 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-20 05:27:25,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802591514] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:27:25,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:27:25,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 56 [2022-07-20 05:27:25,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533675746] [2022-07-20 05:27:25,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:27:25,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-20 05:27:25,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:25,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-20 05:27:25,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=2775, Unknown=0, NotChecked=0, Total=3080 [2022-07-20 05:27:25,175 INFO L87 Difference]: Start difference. First operand 116 states and 119 transitions. Second operand has 56 states, 56 states have (on average 3.9464285714285716) internal successors, (221), 56 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:27:27,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:27,222 INFO L93 Difference]: Finished difference Result 209 states and 212 transitions. [2022-07-20 05:27:27,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-20 05:27:27,223 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.9464285714285716) internal successors, (221), 56 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2022-07-20 05:27:27,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:27,223 INFO L225 Difference]: With dead ends: 209 [2022-07-20 05:27:27,223 INFO L226 Difference]: Without dead ends: 208 [2022-07-20 05:27:27,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2142 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1572, Invalid=8934, Unknown=0, NotChecked=0, Total=10506 [2022-07-20 05:27:27,224 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 605 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 1770 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 1911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:27,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 879 Invalid, 1911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1770 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 05:27:27,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-20 05:27:27,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 195. [2022-07-20 05:27:27,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 191 states have (on average 1.0471204188481675) internal successors, (200), 194 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) [2022-07-20 05:27:27,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 200 transitions. [2022-07-20 05:27:27,227 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 200 transitions. Word has length 103 [2022-07-20 05:27:27,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:27,227 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 200 transitions. [2022-07-20 05:27:27,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.9464285714285716) internal successors, (221), 56 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:27:27,227 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 200 transitions. [2022-07-20 05:27:27,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-20 05:27:27,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:27,227 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:27,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-20 05:27:27,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-07-20 05:27:27,428 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:27:27,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:27,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1334428422, now seen corresponding path program 4 times [2022-07-20 05:27:27,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:27,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530638194] [2022-07-20 05:27:27,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:27,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:27,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 14 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:27:28,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:28,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530638194] [2022-07-20 05:27:28,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530638194] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:27:28,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521764528] [2022-07-20 05:27:28,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:27:28,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:27:28,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:27:28,517 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:27:28,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-20 05:27:29,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:27:29,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:27:29,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 118 conjunts are in the unsatisfiable core [2022-07-20 05:27:29,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:27:29,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:27:29,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:27:29,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:27:31,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:27:34,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:27:38,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:27:44,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:27:47,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:27:52,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:27:53,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:27:53,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2022-07-20 05:27:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 88 proven. 84 refuted. 13 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-20 05:27:53,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:28:06,015 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:28:06,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-07-20 05:28:06,022 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:28:06,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-07-20 05:28:06,025 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 9 treesize of output 7 [2022-07-20 05:28:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 60 proven. 96 refuted. 29 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-20 05:28:07,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521764528] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:28:07,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:28:07,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 26, 26] total 86 [2022-07-20 05:28:07,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493168065] [2022-07-20 05:28:07,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:28:07,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-20 05:28:07,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:28:07,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-20 05:28:07,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=6769, Unknown=92, NotChecked=0, Total=7310 [2022-07-20 05:28:07,166 INFO L87 Difference]: Start difference. First operand 195 states and 200 transitions. Second operand has 86 states, 86 states have (on average 2.8372093023255816) internal successors, (244), 86 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:28:23,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:28:23,298 INFO L93 Difference]: Finished difference Result 199 states and 203 transitions. [2022-07-20 05:28:23,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-20 05:28:23,298 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.8372093023255816) internal successors, (244), 86 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-07-20 05:28:23,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:28:23,299 INFO L225 Difference]: With dead ends: 199 [2022-07-20 05:28:23,299 INFO L226 Difference]: Without dead ends: 127 [2022-07-20 05:28:23,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3456 ImplicationChecksByTransitivity, 52.6s TimeCoverageRelationStatistics Valid=1126, Invalid=14279, Unknown=95, NotChecked=0, Total=15500 [2022-07-20 05:28:23,300 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 239 mSDsluCounter, 1502 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 1545 SdHoareTripleChecker+Invalid, 1818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:28:23,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 1545 Invalid, 1818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1475 Invalid, 0 Unknown, 291 Unchecked, 0.6s Time] [2022-07-20 05:28:23,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-20 05:28:23,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2022-07-20 05:28:23,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 120 states have (on average 1.0583333333333333) internal successors, (127), 123 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:28:23,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2022-07-20 05:28:23,301 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 106 [2022-07-20 05:28:23,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:28:23,301 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2022-07-20 05:28:23,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.8372093023255816) internal successors, (244), 86 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:28:23,301 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2022-07-20 05:28:23,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-20 05:28:23,302 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:28:23,302 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:28:23,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-20 05:28:23,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-07-20 05:28:23,502 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:28:23,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:28:23,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1594413539, now seen corresponding path program 5 times [2022-07-20 05:28:23,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:28:23,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132576844] [2022-07-20 05:28:23,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:28:23,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:28:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:28:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 45 proven. 165 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-20 05:28:23,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:28:23,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132576844] [2022-07-20 05:28:23,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132576844] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:28:23,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502939362] [2022-07-20 05:28:23,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:28:23,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:23,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:28:23,853 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:28:23,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-20 05:28:24,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-20 05:28:24,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:28:24,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 89 conjunts are in the unsatisfiable core [2022-07-20 05:28:24,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:28:24,596 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:28:24,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:28:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 66 proven. 144 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-20 05:28:25,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:28:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 91 proven. 119 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-20 05:28:26,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502939362] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:28:26,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:28:26,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 51 [2022-07-20 05:28:26,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439998262] [2022-07-20 05:28:26,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:28:26,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-20 05:28:26,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:28:26,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-20 05:28:26,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2319, Unknown=0, NotChecked=0, Total=2652 [2022-07-20 05:28:26,112 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand has 52 states, 51 states have (on average 4.607843137254902) internal successors, (235), 52 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:28:26,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:28:26,736 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2022-07-20 05:28:26,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-20 05:28:26,737 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 4.607843137254902) internal successors, (235), 52 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-07-20 05:28:26,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:28:26,737 INFO L225 Difference]: With dead ends: 126 [2022-07-20 05:28:26,737 INFO L226 Difference]: Without dead ends: 121 [2022-07-20 05:28:26,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=672, Invalid=3234, Unknown=0, NotChecked=0, Total=3906 [2022-07-20 05:28:26,738 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 345 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:28:26,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 507 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 05:28:26,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-20 05:28:26,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-07-20 05:28:26,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 117 states have (on average 1.0512820512820513) internal successors, (123), 120 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:28:26,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2022-07-20 05:28:26,740 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 110 [2022-07-20 05:28:26,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:28:26,740 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2022-07-20 05:28:26,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 4.607843137254902) internal successors, (235), 52 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:28:26,741 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2022-07-20 05:28:26,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-20 05:28:26,741 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:28:26,741 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:28:26,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-20 05:28:26,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-07-20 05:28:26,942 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:28:26,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:28:26,942 INFO L85 PathProgramCache]: Analyzing trace with hash -899706093, now seen corresponding path program 12 times [2022-07-20 05:28:26,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:28:26,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772508102] [2022-07-20 05:28:26,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:28:26,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:28:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:28:27,287 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 44 proven. 210 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-20 05:28:27,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:28:27,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772508102] [2022-07-20 05:28:27,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772508102] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:28:27,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956319715] [2022-07-20 05:28:27,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:28:27,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:27,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:28:27,290 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:28:27,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-20 05:28:29,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-20 05:28:29,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:28:29,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 149 conjunts are in the unsatisfiable core [2022-07-20 05:28:29,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:28:29,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:28:29,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:28:30,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:28:30,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:28:30,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:28:30,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:28:30,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:28:30,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:28:30,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:28:31,015 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-20 05:28:31,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-20 05:28:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 24 proven. 231 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-20 05:28:31,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:28:31,142 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2766 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_2766) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2022-07-20 05:28:31,147 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2766 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2766) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2022-07-20 05:28:31,154 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2766 (Array Int Int)) (v_ArrVal_2765 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_2765) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2766) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2022-07-20 05:28:31,160 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2766 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2766) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2022-07-20 05:28:31,166 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2766 (Array Int Int)) (v_ArrVal_2764 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_2764) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2766) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)))) is different from false [2022-07-20 05:28:31,172 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2766 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2766) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2022-07-20 05:28:31,179 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2766 (Array Int Int)) (v_ArrVal_2763 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_2763) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2766) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2022-07-20 05:28:31,185 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2766 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2766) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2022-07-20 05:28:31,191 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2766 (Array Int Int)) (v_ArrVal_2762 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_2762) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2766) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2022-07-20 05:28:31,198 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2766 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2766) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)))) is different from false [2022-07-20 05:28:31,204 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2766 (Array Int Int)) (v_ArrVal_2761 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_2761) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2766) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2022-07-20 05:28:31,212 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2766 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2766) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2022-07-20 05:28:31,219 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2766 (Array Int Int)) (v_ArrVal_2760 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_2760) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2766) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2022-07-20 05:28:31,226 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2766 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2766) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2022-07-20 05:28:31,236 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2766 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_2766) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ 7 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) 0)) is different from false [2022-07-20 05:28:31,241 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:28:31,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:28:31,249 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:28:31,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-20 05:28:31,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:28:31,673 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 24 proven. 92 refuted. 0 times theorem prover too weak. 91 trivial. 139 not checked. [2022-07-20 05:28:31,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956319715] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:28:31,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:28:31,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 30, 30] total 68 [2022-07-20 05:28:31,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102985016] [2022-07-20 05:28:31,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:28:31,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-20 05:28:31,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:28:31,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-20 05:28:31,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2648, Unknown=15, NotChecked=1740, Total=4556 [2022-07-20 05:28:31,674 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand has 68 states, 68 states have (on average 3.1323529411764706) internal successors, (213), 68 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:28:34,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:28:34,892 INFO L93 Difference]: Finished difference Result 298 states and 301 transitions. [2022-07-20 05:28:34,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-07-20 05:28:34,893 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.1323529411764706) internal successors, (213), 68 states have internal predecessors, (213), 0 states have call successors, (0), 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 111 [2022-07-20 05:28:34,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:28:34,896 INFO L225 Difference]: With dead ends: 298 [2022-07-20 05:28:34,896 INFO L226 Difference]: Without dead ends: 135 [2022-07-20 05:28:34,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 173 SyntacticMatches, 8 SemanticMatches, 120 ConstructedPredicates, 15 IntricatePredicates, 11 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=481, Invalid=10904, Unknown=17, NotChecked=3360, Total=14762 [2022-07-20 05:28:34,897 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 117 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1619 SdHoareTripleChecker+Invalid, 3722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2158 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:28:34,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 1619 Invalid, 3722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1537 Invalid, 0 Unknown, 2158 Unchecked, 0.6s Time] [2022-07-20 05:28:34,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-20 05:28:34,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 129. [2022-07-20 05:28:34,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 125 states have (on average 1.048) internal successors, (131), 128 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:28:34,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2022-07-20 05:28:34,900 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 111 [2022-07-20 05:28:34,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:28:34,900 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2022-07-20 05:28:34,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.1323529411764706) internal successors, (213), 68 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:28:34,900 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2022-07-20 05:28:34,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-20 05:28:34,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:28:34,901 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:28:34,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-20 05:28:35,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:35,110 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 05:28:35,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:28:35,110 INFO L85 PathProgramCache]: Analyzing trace with hash 819884889, now seen corresponding path program 13 times [2022-07-20 05:28:35,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:28:35,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991795882] [2022-07-20 05:28:35,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:28:35,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:28:35,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat