./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-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 dd76b7822e4f01d656aa547f942373edd42b5cbb2c90dd9f0d7299ee64d98734 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:05:32,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:05:32,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:05:32,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:05:32,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:05:32,565 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:05:32,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:05:32,569 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:05:32,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:05:32,575 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:05:32,576 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:05:32,578 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:05:32,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:05:32,580 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:05:32,581 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:05:32,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:05:32,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:05:32,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:05:32,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:05:32,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:05:32,595 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:05:32,596 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:05:32,597 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:05:32,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:05:32,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:05:32,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:05:32,604 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:05:32,604 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:05:32,605 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:05:32,605 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:05:32,607 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:05:32,608 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:05:32,609 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:05:32,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:05:32,611 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:05:32,612 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:05:32,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:05:32,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:05:32,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:05:32,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:05:32,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:05:32,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:05:32,624 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 06:05:32,672 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:05:32,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:05:32,672 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:05:32,673 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:05:32,673 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:05:32,673 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:05:32,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:05:32,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:05:32,674 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:05:32,674 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:05:32,674 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:05:32,674 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:05:32,674 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:05:32,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:05:32,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:05:32,675 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:05:32,675 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:05:32,675 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:05:32,675 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:05:32,675 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:05:32,675 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:05:32,675 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:05:32,676 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:05:32,676 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:05:32,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:05:32,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:05:32,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:05:32,676 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:05:32,676 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 06:05:32,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 06:05:32,676 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dd76b7822e4f01d656aa547f942373edd42b5cbb2c90dd9f0d7299ee64d98734 [2022-07-14 06:05:33,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:05:33,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:05:33,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:05:33,046 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:05:33,059 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:05:33,060 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i [2022-07-14 06:05:33,171 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ed4358ec/7a61a3d4be6842e2a6d52a7b2ee68fcc/FLAG16f71b458 [2022-07-14 06:05:33,851 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:05:33,851 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i [2022-07-14 06:05:33,868 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ed4358ec/7a61a3d4be6842e2a6d52a7b2ee68fcc/FLAG16f71b458 [2022-07-14 06:05:34,084 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ed4358ec/7a61a3d4be6842e2a6d52a7b2ee68fcc [2022-07-14 06:05:34,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:05:34,092 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:05:34,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:05:34,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:05:34,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:05:34,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:05:34" (1/1) ... [2022-07-14 06:05:34,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6925e7ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:05:34, skipping insertion in model container [2022-07-14 06:05:34,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:05:34" (1/1) ... [2022-07-14 06:05:34,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:05:34,165 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:05:34,570 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:05:34,578 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 06:05:34,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:05:34,653 INFO L208 MainTranslator]: Completed translation [2022-07-14 06:05:34,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:05:34 WrapperNode [2022-07-14 06:05:34,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:05:34,656 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 06:05:34,661 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 06:05:34,663 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 06:05:34,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:05:34" (1/1) ... [2022-07-14 06:05:34,718 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:05:34" (1/1) ... [2022-07-14 06:05:34,740 INFO L137 Inliner]: procedures = 117, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2022-07-14 06:05:34,741 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 06:05:34,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 06:05:34,743 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 06:05:34,743 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 06:05:34,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:05:34" (1/1) ... [2022-07-14 06:05:34,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:05:34" (1/1) ... [2022-07-14 06:05:34,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:05:34" (1/1) ... [2022-07-14 06:05:34,766 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:05:34" (1/1) ... [2022-07-14 06:05:34,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:05:34" (1/1) ... [2022-07-14 06:05:34,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:05:34" (1/1) ... [2022-07-14 06:05:34,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:05:34" (1/1) ... [2022-07-14 06:05:34,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 06:05:34,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 06:05:34,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 06:05:34,794 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 06:05:34,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:05:34" (1/1) ... [2022-07-14 06:05:34,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:05:34,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:34,877 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-14 06:05:34,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-14 06:05:34,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-14 06:05:34,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-14 06:05:34,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 06:05:34,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 06:05:34,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 06:05:34,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 06:05:35,131 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 06:05:35,132 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 06:05:35,275 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 06:05:35,279 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 06:05:35,280 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-14 06:05:35,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:05:35 BoogieIcfgContainer [2022-07-14 06:05:35,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 06:05:35,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 06:05:35,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 06:05:35,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 06:05:35,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 06:05:34" (1/3) ... [2022-07-14 06:05:35,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62621ff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:05:35, skipping insertion in model container [2022-07-14 06:05:35,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:05:34" (2/3) ... [2022-07-14 06:05:35,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62621ff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:05:35, skipping insertion in model container [2022-07-14 06:05:35,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:05:35" (3/3) ... [2022-07-14 06:05:35,307 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlen-alloca-1.i [2022-07-14 06:05:35,318 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 06:05:35,328 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2022-07-14 06:05:35,405 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 06:05:35,412 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@22e3c1a7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1fba7cb [2022-07-14 06:05:35,412 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-14 06:05:35,417 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:35,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 06:05:35,421 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:35,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 06:05:35,423 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:05:35,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:35,428 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2022-07-14 06:05:35,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:35,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085987216] [2022-07-14 06:05:35,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:35,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:35,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:35,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:35,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085987216] [2022-07-14 06:05:35,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085987216] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:35,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:05:35,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:05:35,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616622388] [2022-07-14 06:05:35,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:35,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:05:35,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:35,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:05:35,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:05:35,753 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:35,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:35,804 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2022-07-14 06:05:35,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:05:35,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-14 06:05:35,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:35,812 INFO L225 Difference]: With dead ends: 42 [2022-07-14 06:05:35,813 INFO L226 Difference]: Without dead ends: 38 [2022-07-14 06:05:35,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:05:35,817 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:35,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 42 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:05:35,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-14 06:05:35,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2022-07-14 06:05:35,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.5) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:35,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-07-14 06:05:35,845 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 6 [2022-07-14 06:05:35,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:35,845 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-07-14 06:05:35,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:35,846 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-07-14 06:05:35,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 06:05:35,847 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:35,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 06:05:35,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-14 06:05:35,847 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:05:35,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:35,848 INFO L85 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2022-07-14 06:05:35,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:35,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881165949] [2022-07-14 06:05:35,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:35,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:35,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:35,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:35,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881165949] [2022-07-14 06:05:35,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881165949] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:35,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:05:35,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:05:35,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872297662] [2022-07-14 06:05:35,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:35,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:05:35,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:35,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:05:35,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:05:35,884 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:35,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:35,902 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2022-07-14 06:05:35,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:05:35,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-14 06:05:35,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:35,903 INFO L225 Difference]: With dead ends: 23 [2022-07-14 06:05:35,903 INFO L226 Difference]: Without dead ends: 23 [2022-07-14 06:05:35,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:05:35,905 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:35,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 17 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:05:35,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-14 06:05:35,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-14 06:05:35,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:35,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-07-14 06:05:35,909 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 6 [2022-07-14 06:05:35,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:35,910 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-07-14 06:05:35,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:35,910 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-07-14 06:05:35,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 06:05:35,911 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:35,911 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 06:05:35,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-14 06:05:35,912 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:05:35,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:35,912 INFO L85 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2022-07-14 06:05:35,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:35,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186273856] [2022-07-14 06:05:35,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:35,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:36,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:36,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186273856] [2022-07-14 06:05:36,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186273856] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:36,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:05:36,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:05:36,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835234910] [2022-07-14 06:05:36,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:36,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:05:36,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:36,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:05:36,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:05:36,065 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:36,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:36,085 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-07-14 06:05:36,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:05:36,087 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-14 06:05:36,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:36,088 INFO L225 Difference]: With dead ends: 22 [2022-07-14 06:05:36,088 INFO L226 Difference]: Without dead ends: 22 [2022-07-14 06:05:36,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:05:36,090 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:36,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 15 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:05:36,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-14 06:05:36,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-14 06:05:36,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 21 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) [2022-07-14 06:05:36,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-07-14 06:05:36,097 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 6 [2022-07-14 06:05:36,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:36,098 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-07-14 06:05:36,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:36,099 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-07-14 06:05:36,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 06:05:36,099 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:36,100 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 06:05:36,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-14 06:05:36,100 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:05:36,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:36,101 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2022-07-14 06:05:36,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:36,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802173774] [2022-07-14 06:05:36,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:36,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:36,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:36,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:36,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802173774] [2022-07-14 06:05:36,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802173774] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:36,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:05:36,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:05:36,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437442566] [2022-07-14 06:05:36,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:36,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:05:36,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:36,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:05:36,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:05:36,202 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:36,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:36,247 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-07-14 06:05:36,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:05:36,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-14 06:05:36,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:36,251 INFO L225 Difference]: With dead ends: 37 [2022-07-14 06:05:36,251 INFO L226 Difference]: Without dead ends: 37 [2022-07-14 06:05:36,251 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 [2022-07-14 06:05:36,255 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 47 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:36,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 25 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:05:36,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-14 06:05:36,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2022-07-14 06:05:36,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.35) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:36,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-07-14 06:05:36,259 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 6 [2022-07-14 06:05:36,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:36,259 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-07-14 06:05:36,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:36,260 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-07-14 06:05:36,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-14 06:05:36,260 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:36,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:36,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-14 06:05:36,261 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:05:36,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:36,261 INFO L85 PathProgramCache]: Analyzing trace with hash 119484120, now seen corresponding path program 1 times [2022-07-14 06:05:36,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:36,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023045611] [2022-07-14 06:05:36,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:36,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:36,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:36,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:36,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023045611] [2022-07-14 06:05:36,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023045611] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:36,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:05:36,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:05:36,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833149445] [2022-07-14 06:05:36,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:36,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:05:36,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:36,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:05:36,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:05:36,304 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:36,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:36,346 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-07-14 06:05:36,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:05:36,347 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-14 06:05:36,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:36,348 INFO L225 Difference]: With dead ends: 23 [2022-07-14 06:05:36,349 INFO L226 Difference]: Without dead ends: 23 [2022-07-14 06:05:36,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:05:36,351 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:36,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 21 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:05:36,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-14 06:05:36,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-14 06:05:36,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:36,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-07-14 06:05:36,356 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 8 [2022-07-14 06:05:36,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:36,356 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-07-14 06:05:36,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:36,357 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-07-14 06:05:36,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-14 06:05:36,358 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:36,359 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:36,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-14 06:05:36,360 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:05:36,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:36,360 INFO L85 PathProgramCache]: Analyzing trace with hash 119484121, now seen corresponding path program 1 times [2022-07-14 06:05:36,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:36,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228270024] [2022-07-14 06:05:36,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:36,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:36,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:36,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:36,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228270024] [2022-07-14 06:05:36,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228270024] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:36,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:05:36,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:05:36,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369655661] [2022-07-14 06:05:36,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:36,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:05:36,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:36,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:05:36,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:05:36,476 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:36,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:36,523 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-07-14 06:05:36,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:05:36,530 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-14 06:05:36,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:36,531 INFO L225 Difference]: With dead ends: 30 [2022-07-14 06:05:36,531 INFO L226 Difference]: Without dead ends: 30 [2022-07-14 06:05:36,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:05:36,535 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:36,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 25 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:05:36,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-14 06:05:36,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2022-07-14 06:05:36,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:36,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-07-14 06:05:36,541 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 8 [2022-07-14 06:05:36,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:36,541 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-07-14 06:05:36,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:36,541 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-07-14 06:05:36,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-14 06:05:36,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:36,542 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:36,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-14 06:05:36,543 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:05:36,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:36,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2022-07-14 06:05:36,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:36,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464659987] [2022-07-14 06:05:36,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:36,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:36,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:36,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:36,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464659987] [2022-07-14 06:05:36,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464659987] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:36,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201202050] [2022-07-14 06:05:36,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:36,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:36,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:36,626 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:05:36,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-14 06:05:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:36,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 06:05:36,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:36,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:05:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:36,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:37,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201202050] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:37,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:37,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-07-14 06:05:37,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399694423] [2022-07-14 06:05:37,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:37,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:05:37,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:37,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:05:37,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:05:37,114 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:37,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:37,250 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-07-14 06:05:37,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:05:37,251 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-14 06:05:37,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:37,251 INFO L225 Difference]: With dead ends: 48 [2022-07-14 06:05:37,251 INFO L226 Difference]: Without dead ends: 48 [2022-07-14 06:05:37,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-07-14 06:05:37,252 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 77 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:37,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 73 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:05:37,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-14 06:05:37,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 21. [2022-07-14 06:05:37,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:37,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-07-14 06:05:37,255 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2022-07-14 06:05:37,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:37,256 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-07-14 06:05:37,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:37,256 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-07-14 06:05:37,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 06:05:37,256 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:37,256 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:37,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:37,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:37,481 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:05:37,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:37,482 INFO L85 PathProgramCache]: Analyzing trace with hash -976458485, now seen corresponding path program 1 times [2022-07-14 06:05:37,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:37,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854625713] [2022-07-14 06:05:37,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:37,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:37,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:37,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:37,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854625713] [2022-07-14 06:05:37,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854625713] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:37,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:05:37,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 06:05:37,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546846258] [2022-07-14 06:05:37,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:37,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:05:37,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:37,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:05:37,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:05:37,729 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:37,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:37,833 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2022-07-14 06:05:37,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:05:37,834 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-14 06:05:37,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:37,834 INFO L225 Difference]: With dead ends: 29 [2022-07-14 06:05:37,834 INFO L226 Difference]: Without dead ends: 29 [2022-07-14 06:05:37,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:05:37,835 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:37,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 73 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:05:37,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-14 06:05:37,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-07-14 06:05:37,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:37,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-07-14 06:05:37,838 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 11 [2022-07-14 06:05:37,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:37,838 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-07-14 06:05:37,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:37,838 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-07-14 06:05:37,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 06:05:37,839 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:37,839 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:37,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-14 06:05:37,839 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:05:37,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:37,839 INFO L85 PathProgramCache]: Analyzing trace with hash -296400115, now seen corresponding path program 1 times [2022-07-14 06:05:37,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:37,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109949158] [2022-07-14 06:05:37,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:37,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:37,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:37,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:37,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:37,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109949158] [2022-07-14 06:05:37,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109949158] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:37,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:05:37,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-14 06:05:37,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268203689] [2022-07-14 06:05:37,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:37,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:05:37,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:37,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:05:37,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:05:37,943 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:38,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:38,090 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-07-14 06:05:38,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:05:38,090 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-14 06:05:38,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:38,090 INFO L225 Difference]: With dead ends: 37 [2022-07-14 06:05:38,091 INFO L226 Difference]: Without dead ends: 37 [2022-07-14 06:05:38,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:05:38,093 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 41 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:38,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 60 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:05:38,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-14 06:05:38,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2022-07-14 06:05:38,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:38,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-07-14 06:05:38,102 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 11 [2022-07-14 06:05:38,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:38,103 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-07-14 06:05:38,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:38,103 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-07-14 06:05:38,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-14 06:05:38,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:38,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:38,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-14 06:05:38,104 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:05:38,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:38,104 INFO L85 PathProgramCache]: Analyzing trace with hash -205497247, now seen corresponding path program 1 times [2022-07-14 06:05:38,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:38,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323537269] [2022-07-14 06:05:38,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:38,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:38,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:38,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:38,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323537269] [2022-07-14 06:05:38,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323537269] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:38,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:05:38,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:05:38,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062950544] [2022-07-14 06:05:38,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:38,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:05:38,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:38,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:05:38,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:05:38,171 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:38,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:38,191 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-07-14 06:05:38,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:05:38,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-14 06:05:38,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:38,192 INFO L225 Difference]: With dead ends: 25 [2022-07-14 06:05:38,192 INFO L226 Difference]: Without dead ends: 16 [2022-07-14 06:05:38,193 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 [2022-07-14 06:05:38,194 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 26 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 [2022-07-14 06:05:38,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 26 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:05:38,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-07-14 06:05:38,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-07-14 06:05:38,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:38,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-07-14 06:05:38,198 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2022-07-14 06:05:38,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:38,198 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-07-14 06:05:38,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:38,198 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-07-14 06:05:38,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-14 06:05:38,199 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:38,199 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:38,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-14 06:05:38,199 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:05:38,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:38,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1218087850, now seen corresponding path program 1 times [2022-07-14 06:05:38,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:38,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422588158] [2022-07-14 06:05:38,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:38,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:38,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:38,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:38,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422588158] [2022-07-14 06:05:38,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422588158] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:38,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680363471] [2022-07-14 06:05:38,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:38,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:38,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:38,357 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:05:38,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-14 06:05:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:38,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 06:05:38,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:38,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:38,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:05:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:38,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680363471] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:38,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:38,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-07-14 06:05:38,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720843811] [2022-07-14 06:05:38,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:38,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-14 06:05:38,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:38,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-14 06:05:38,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-07-14 06:05:38,804 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:38,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:38,990 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2022-07-14 06:05:38,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:05:38,991 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 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 [2022-07-14 06:05:38,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:38,991 INFO L225 Difference]: With dead ends: 24 [2022-07-14 06:05:38,991 INFO L226 Difference]: Without dead ends: 24 [2022-07-14 06:05:38,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-07-14 06:05:38,992 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 73 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:38,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 40 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:05:38,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-14 06:05:38,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2022-07-14 06:05:38,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:38,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-07-14 06:05:38,996 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2022-07-14 06:05:38,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:38,997 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-07-14 06:05:38,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:38,997 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-07-14 06:05:38,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-14 06:05:38,997 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:38,998 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:39,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:39,223 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,SelfDestructingSolverStorable10 [2022-07-14 06:05:39,223 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:05:39,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:39,223 INFO L85 PathProgramCache]: Analyzing trace with hash -123563366, now seen corresponding path program 2 times [2022-07-14 06:05:39,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:39,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531731708] [2022-07-14 06:05:39,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:39,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:39,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:39,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531731708] [2022-07-14 06:05:39,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531731708] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:39,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85582020] [2022-07-14 06:05:39,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:05:39,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:39,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:39,380 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:05:39,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-14 06:05:39,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:05:39,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:39,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-14 06:05:39,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:39,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:05:39,626 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:05:39,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-14 06:05:39,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:39,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:39,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:05:39,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:05:39,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:05:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:40,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85582020] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:40,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:40,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-07-14 06:05:40,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428489763] [2022-07-14 06:05:40,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:40,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-14 06:05:40,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:40,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-14 06:05:40,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-07-14 06:05:40,016 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:40,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:40,301 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2022-07-14 06:05:40,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-14 06:05:40,316 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-14 06:05:40,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:40,316 INFO L225 Difference]: With dead ends: 38 [2022-07-14 06:05:40,316 INFO L226 Difference]: Without dead ends: 31 [2022-07-14 06:05:40,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2022-07-14 06:05:40,317 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:40,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 93 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-07-14 06:05:40,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-14 06:05:40,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2022-07-14 06:05:40,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:40,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-07-14 06:05:40,319 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 18 [2022-07-14 06:05:40,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:40,319 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-07-14 06:05:40,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:40,319 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-07-14 06:05:40,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 06:05:40,320 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:40,320 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:40,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-14 06:05:40,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:40,528 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:05:40,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:40,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1941489159, now seen corresponding path program 3 times [2022-07-14 06:05:40,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:40,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577074775] [2022-07-14 06:05:40,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:40,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:40,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:40,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577074775] [2022-07-14 06:05:40,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577074775] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:40,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633357625] [2022-07-14 06:05:40,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:05:40,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:40,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:40,666 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:05:40,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-14 06:05:40,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-14 06:05:40,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:40,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-14 06:05:40,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:40,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:05:40,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:05:40,928 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:40,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:40,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:05:40,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:05:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:41,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633357625] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:41,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:41,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-07-14 06:05:41,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531901325] [2022-07-14 06:05:41,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:41,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-14 06:05:41,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:41,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-14 06:05:41,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-07-14 06:05:41,077 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:41,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:41,303 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2022-07-14 06:05:41,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 06:05:41,303 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-14 06:05:41,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:41,304 INFO L225 Difference]: With dead ends: 43 [2022-07-14 06:05:41,304 INFO L226 Difference]: Without dead ends: 33 [2022-07-14 06:05:41,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2022-07-14 06:05:41,305 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:41,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 94 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 171 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2022-07-14 06:05:41,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-14 06:05:41,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2022-07-14 06:05:41,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:41,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-07-14 06:05:41,307 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2022-07-14 06:05:41,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:41,307 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-07-14 06:05:41,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:41,307 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-07-14 06:05:41,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-14 06:05:41,308 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:41,308 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:41,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:41,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:41,509 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:05:41,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:41,510 INFO L85 PathProgramCache]: Analyzing trace with hash -413257756, now seen corresponding path program 4 times [2022-07-14 06:05:41,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:41,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272049950] [2022-07-14 06:05:41,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:41,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:41,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:41,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272049950] [2022-07-14 06:05:41,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272049950] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:41,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233292715] [2022-07-14 06:05:41,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:05:41,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:41,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:41,676 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:05:41,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-14 06:05:41,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:05:41,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:41,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-14 06:05:41,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:41,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:05:41,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:05:42,008 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:05:42,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-07-14 06:05:42,095 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:42,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:42,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:05:42,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:05:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:42,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233292715] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:42,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:42,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 32 [2022-07-14 06:05:42,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039147392] [2022-07-14 06:05:42,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:42,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-14 06:05:42,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:42,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-14 06:05:42,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2022-07-14 06:05:42,859 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 33 states, 32 states have (on average 2.40625) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:43,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:43,943 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2022-07-14 06:05:43,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-14 06:05:43,943 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.40625) internal successors, (77), 33 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) Word has length 29 [2022-07-14 06:05:43,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:43,944 INFO L225 Difference]: With dead ends: 38 [2022-07-14 06:05:43,944 INFO L226 Difference]: Without dead ends: 38 [2022-07-14 06:05:43,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=399, Invalid=1581, Unknown=0, NotChecked=0, Total=1980 [2022-07-14 06:05:43,945 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 93 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:43,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 121 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 335 Invalid, 0 Unknown, 8 Unchecked, 0.2s Time] [2022-07-14 06:05:43,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-14 06:05:43,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-07-14 06:05:43,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:43,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-07-14 06:05:43,947 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 29 [2022-07-14 06:05:43,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:43,948 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-07-14 06:05:43,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.40625) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:43,948 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-07-14 06:05:43,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-14 06:05:43,949 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:43,949 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:43,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-14 06:05:44,149 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,SelfDestructingSolverStorable13 [2022-07-14 06:05:44,150 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:05:44,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:44,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1453066652, now seen corresponding path program 5 times [2022-07-14 06:05:44,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:44,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482653653] [2022-07-14 06:05:44,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:44,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:44,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:44,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482653653] [2022-07-14 06:05:44,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482653653] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:44,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540359541] [2022-07-14 06:05:44,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:05:44,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:44,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:44,373 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:05:44,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-14 06:05:44,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-14 06:05:44,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:44,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-14 06:05:44,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:44,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:05:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:44,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:44,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540359541] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:44,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:44,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-07-14 06:05:44,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549670637] [2022-07-14 06:05:44,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:44,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-14 06:05:44,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:44,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-14 06:05:44,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2022-07-14 06:05:44,872 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:45,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:45,094 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2022-07-14 06:05:45,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 06:05:45,097 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-14 06:05:45,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:45,097 INFO L225 Difference]: With dead ends: 58 [2022-07-14 06:05:45,097 INFO L226 Difference]: Without dead ends: 43 [2022-07-14 06:05:45,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2022-07-14 06:05:45,098 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:45,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 99 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:05:45,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-14 06:05:45,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-07-14 06:05:45,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:45,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-07-14 06:05:45,100 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2022-07-14 06:05:45,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:45,100 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-07-14 06:05:45,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:45,100 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-07-14 06:05:45,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-14 06:05:45,101 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:45,101 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:45,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:45,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-14 06:05:45,302 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:05:45,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:45,303 INFO L85 PathProgramCache]: Analyzing trace with hash -376934399, now seen corresponding path program 6 times [2022-07-14 06:05:45,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:45,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000613539] [2022-07-14 06:05:45,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:45,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:45,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:45,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000613539] [2022-07-14 06:05:45,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000613539] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:45,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525433717] [2022-07-14 06:05:45,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:05:45,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:45,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:45,590 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:05:45,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-14 06:05:45,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-14 06:05:45,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:45,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-14 06:05:45,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:45,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:05:47,245 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:05:47,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-14 06:05:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:47,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:48,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:05:48,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:05:48,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:05:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:48,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525433717] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:48,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:48,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 41 [2022-07-14 06:05:48,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535470425] [2022-07-14 06:05:48,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:48,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-14 06:05:48,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:48,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-14 06:05:48,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1496, Unknown=0, NotChecked=0, Total=1640 [2022-07-14 06:05:48,228 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:54,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:54,190 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2022-07-14 06:05:54,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-14 06:05:54,200 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 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 [2022-07-14 06:05:54,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:54,200 INFO L225 Difference]: With dead ends: 68 [2022-07-14 06:05:54,200 INFO L226 Difference]: Without dead ends: 52 [2022-07-14 06:05:54,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 57 SyntacticMatches, 11 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=349, Invalid=3073, Unknown=0, NotChecked=0, Total=3422 [2022-07-14 06:05:54,202 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 55 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:54,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 267 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 339 Invalid, 0 Unknown, 141 Unchecked, 0.4s Time] [2022-07-14 06:05:54,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-14 06:05:54,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2022-07-14 06:05:54,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:54,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-07-14 06:05:54,204 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 39 [2022-07-14 06:05:54,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:54,204 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-07-14 06:05:54,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:54,205 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-07-14 06:05:54,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-14 06:05:54,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:54,205 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:54,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:54,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:54,420 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:05:54,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:54,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1358190938, now seen corresponding path program 7 times [2022-07-14 06:05:54,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:54,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359185388] [2022-07-14 06:05:54,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:54,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:54,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:54,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359185388] [2022-07-14 06:05:54,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359185388] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:54,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6268825] [2022-07-14 06:05:54,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:05:54,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:54,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:54,775 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:05:54,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-14 06:05:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:54,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-14 06:05:54,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:55,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:05:55,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:05:55,146 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:55,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:55,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:05:55,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:05:55,363 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:55,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6268825] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:55,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:55,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 32 [2022-07-14 06:05:55,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57368371] [2022-07-14 06:05:55,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:55,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-14 06:05:55,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:55,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-14 06:05:55,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2022-07-14 06:05:55,365 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:56,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:56,020 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2022-07-14 06:05:56,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-14 06:05:56,021 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-14 06:05:56,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:56,021 INFO L225 Difference]: With dead ends: 73 [2022-07-14 06:05:56,022 INFO L226 Difference]: Without dead ends: 54 [2022-07-14 06:05:56,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=243, Invalid=1827, Unknown=0, NotChecked=0, Total=2070 [2022-07-14 06:05:56,023 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 70 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:56,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 264 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:05:56,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-14 06:05:56,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2022-07-14 06:05:56,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:56,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-07-14 06:05:56,026 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2022-07-14 06:05:56,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:56,026 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-07-14 06:05:56,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:56,027 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-07-14 06:05:56,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-14 06:05:56,028 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:56,028 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:56,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:56,247 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,SelfDestructingSolverStorable16 [2022-07-14 06:05:56,248 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:05:56,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:56,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1602484457, now seen corresponding path program 8 times [2022-07-14 06:05:56,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:56,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572502526] [2022-07-14 06:05:56,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:56,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 28 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:56,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:56,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572502526] [2022-07-14 06:05:56,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572502526] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:56,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120507877] [2022-07-14 06:05:56,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:05:56,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:56,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:56,529 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:05:56,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-14 06:05:56,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:05:56,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:56,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-14 06:05:56,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 45 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:56,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:57,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:05:57,130 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 45 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:57,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120507877] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:57,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:57,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 35 [2022-07-14 06:05:57,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592740837] [2022-07-14 06:05:57,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:57,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-14 06:05:57,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:57,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-14 06:05:57,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2022-07-14 06:05:57,132 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 36 states, 35 states have (on average 2.914285714285714) internal successors, (102), 36 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:57,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:57,559 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2022-07-14 06:05:57,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-14 06:05:57,560 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.914285714285714) internal successors, (102), 36 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-07-14 06:05:57,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:57,560 INFO L225 Difference]: With dead ends: 56 [2022-07-14 06:05:57,561 INFO L226 Difference]: Without dead ends: 56 [2022-07-14 06:05:57,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=381, Invalid=1599, Unknown=0, NotChecked=0, Total=1980 [2022-07-14 06:05:57,562 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 102 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:57,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 211 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:05:57,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-14 06:05:57,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-07-14 06:05:57,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:57,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-07-14 06:05:57,564 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 50 [2022-07-14 06:05:57,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:57,565 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-07-14 06:05:57,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.914285714285714) internal successors, (102), 36 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:57,565 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-07-14 06:05:57,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-14 06:05:57,565 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:57,565 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:57,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:57,775 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,SelfDestructingSolverStorable17 [2022-07-14 06:05:57,776 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:05:57,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:57,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1052944635, now seen corresponding path program 9 times [2022-07-14 06:05:57,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:57,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898560678] [2022-07-14 06:05:57,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:57,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 13 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:58,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:58,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898560678] [2022-07-14 06:05:58,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898560678] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:58,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821154801] [2022-07-14 06:05:58,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:05:58,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:58,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:58,078 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:05:58,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-14 06:05:58,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-14 06:05:58,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:58,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-14 06:05:58,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:58,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:05:58,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:05:58,578 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 13 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:58,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:58,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:05:58,682 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 26 treesize of output 22 [2022-07-14 06:05:58,842 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 13 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:58,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821154801] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:58,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:58,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 35 [2022-07-14 06:05:58,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898085181] [2022-07-14 06:05:58,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:58,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-14 06:05:58,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:58,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-14 06:05:58,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2022-07-14 06:05:58,844 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 35 states, 35 states have (on average 2.6857142857142855) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:59,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:59,566 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2022-07-14 06:05:59,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-14 06:05:59,567 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.6857142857142855) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-14 06:05:59,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:59,567 INFO L225 Difference]: With dead ends: 83 [2022-07-14 06:05:59,567 INFO L226 Difference]: Without dead ends: 61 [2022-07-14 06:05:59,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 85 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=269, Invalid=2281, Unknown=0, NotChecked=0, Total=2550 [2022-07-14 06:05:59,569 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 116 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:59,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 313 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:05:59,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-14 06:05:59,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2022-07-14 06:05:59,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:59,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-07-14 06:05:59,571 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2022-07-14 06:05:59,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:59,572 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-07-14 06:05:59,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.6857142857142855) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:59,572 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-07-14 06:05:59,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 06:05:59,573 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:59,573 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:59,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:59,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:59,792 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:05:59,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:59,792 INFO L85 PathProgramCache]: Analyzing trace with hash -409414312, now seen corresponding path program 10 times [2022-07-14 06:05:59,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:59,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999562792] [2022-07-14 06:05:59,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:59,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:59,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:00,108 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 45 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:00,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:00,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999562792] [2022-07-14 06:06:00,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999562792] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:00,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522408702] [2022-07-14 06:06:00,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:06:00,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:00,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:00,109 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:00,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-14 06:06:00,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:06:00,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:00,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-14 06:06:00,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:00,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:06:00,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:06:00,851 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:00,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-07-14 06:06:00,974 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 72 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:00,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:01,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:06:01,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:06:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 91 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:02,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522408702] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:02,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:02,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 21] total 57 [2022-07-14 06:06:02,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050062187] [2022-07-14 06:06:02,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:02,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-14 06:06:02,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:02,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-14 06:06:02,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=2948, Unknown=0, NotChecked=0, Total=3306 [2022-07-14 06:06:02,601 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 58 states, 57 states have (on average 2.8947368421052633) internal successors, (165), 58 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) [2022-07-14 06:06:03,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:03,752 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2022-07-14 06:06:03,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-14 06:06:03,753 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 2.8947368421052633) internal successors, (165), 58 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) Word has length 57 [2022-07-14 06:06:03,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:03,753 INFO L225 Difference]: With dead ends: 66 [2022-07-14 06:06:03,753 INFO L226 Difference]: Without dead ends: 66 [2022-07-14 06:06:03,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=950, Invalid=4600, Unknown=0, NotChecked=0, Total=5550 [2022-07-14 06:06:03,755 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 253 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:03,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 383 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 995 Invalid, 0 Unknown, 22 Unchecked, 0.5s Time] [2022-07-14 06:06:03,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-14 06:06:03,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-07-14 06:06:03,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:03,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-07-14 06:06:03,761 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 57 [2022-07-14 06:06:03,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:03,761 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-07-14 06:06:03,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 2.8947368421052633) internal successors, (165), 58 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) [2022-07-14 06:06:03,762 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-07-14 06:06:03,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-14 06:06:03,763 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:03,763 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:03,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:03,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:03,968 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:06:03,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:03,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1923200216, now seen corresponding path program 11 times [2022-07-14 06:06:03,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:03,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059889532] [2022-07-14 06:06:03,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:03,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:04,208 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 95 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:04,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:04,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059889532] [2022-07-14 06:06:04,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059889532] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:04,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54714804] [2022-07-14 06:06:04,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:06:04,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:04,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:04,209 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:04,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-14 06:06:04,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-14 06:06:04,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:04,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-14 06:06:04,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:04,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:06:04,828 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 117 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:04,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 117 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:05,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54714804] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:05,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:05,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 49 [2022-07-14 06:06:05,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593703615] [2022-07-14 06:06:05,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:05,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-14 06:06:05,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:05,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-14 06:06:05,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1908, Unknown=0, NotChecked=0, Total=2352 [2022-07-14 06:06:05,231 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 49 states, 49 states have (on average 3.163265306122449) internal successors, (155), 49 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:05,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:05,569 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2022-07-14 06:06:05,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 06:06:05,570 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.163265306122449) internal successors, (155), 49 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-14 06:06:05,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:05,570 INFO L225 Difference]: With dead ends: 98 [2022-07-14 06:06:05,570 INFO L226 Difference]: Without dead ends: 71 [2022-07-14 06:06:05,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=732, Invalid=2690, Unknown=0, NotChecked=0, Total=3422 [2022-07-14 06:06:05,571 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 77 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:05,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 151 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:06:05,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-14 06:06:05,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2022-07-14 06:06:05,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:05,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2022-07-14 06:06:05,574 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 63 [2022-07-14 06:06:05,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:05,574 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2022-07-14 06:06:05,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.163265306122449) internal successors, (155), 49 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:05,574 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2022-07-14 06:06:05,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-14 06:06:05,575 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:05,575 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:05,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:05,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-14 06:06:05,779 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:06:05,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:05,780 INFO L85 PathProgramCache]: Analyzing trace with hash -305803019, now seen corresponding path program 12 times [2022-07-14 06:06:05,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:05,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727902699] [2022-07-14 06:06:05,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:05,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 17 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:06,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:06,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727902699] [2022-07-14 06:06:06,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727902699] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:06,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896872133] [2022-07-14 06:06:06,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:06:06,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:06,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:06,294 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:06,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-14 06:06:06,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-14 06:06:06,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:06,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-14 06:06:06,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:06,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:06:06,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:06:06,865 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 17 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:06,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:06,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:06:06,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:06:07,193 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 17 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:07,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896872133] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:07,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:07,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 41 [2022-07-14 06:06:07,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186567179] [2022-07-14 06:06:07,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:07,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-14 06:06:07,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:07,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-14 06:06:07,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2022-07-14 06:06:07,195 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 41 states, 41 states have (on average 2.8292682926829267) internal successors, (116), 41 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:08,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:08,262 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2022-07-14 06:06:08,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-14 06:06:08,263 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.8292682926829267) internal successors, (116), 41 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-14 06:06:08,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:08,264 INFO L225 Difference]: With dead ends: 103 [2022-07-14 06:06:08,264 INFO L226 Difference]: Without dead ends: 75 [2022-07-14 06:06:08,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 110 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=285, Invalid=3375, Unknown=0, NotChecked=0, Total=3660 [2022-07-14 06:06:08,266 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 139 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:08,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 560 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1304 Invalid, 0 Unknown, 50 Unchecked, 0.5s Time] [2022-07-14 06:06:08,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-14 06:06:08,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2022-07-14 06:06:08,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 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) [2022-07-14 06:06:08,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-07-14 06:06:08,268 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 67 [2022-07-14 06:06:08,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:08,268 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-07-14 06:06:08,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.8292682926829267) internal successors, (116), 41 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:08,269 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-07-14 06:06:08,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-14 06:06:08,269 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:08,270 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:08,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:08,475 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,SelfDestructingSolverStorable21 [2022-07-14 06:06:08,475 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:06:08,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:08,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1022060910, now seen corresponding path program 13 times [2022-07-14 06:06:08,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:08,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120625705] [2022-07-14 06:06:08,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:08,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 91 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:08,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:08,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120625705] [2022-07-14 06:06:08,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120625705] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:08,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936113809] [2022-07-14 06:06:08,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:06:08,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:08,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:08,817 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:08,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-14 06:06:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:08,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-14 06:06:08,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 120 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:09,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:09,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:06:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 120 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:09,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936113809] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:09,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:09,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 23] total 46 [2022-07-14 06:06:09,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270053722] [2022-07-14 06:06:09,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:09,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-14 06:06:09,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:09,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-14 06:06:09,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1930, Unknown=0, NotChecked=0, Total=2162 [2022-07-14 06:06:09,690 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 47 states, 46 states have (on average 3.130434782608696) internal successors, (144), 47 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) [2022-07-14 06:06:10,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:10,494 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2022-07-14 06:06:10,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-14 06:06:10,495 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 3.130434782608696) internal successors, (144), 47 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 71 [2022-07-14 06:06:10,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:10,495 INFO L225 Difference]: With dead ends: 77 [2022-07-14 06:06:10,495 INFO L226 Difference]: Without dead ends: 77 [2022-07-14 06:06:10,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=818, Invalid=3604, Unknown=0, NotChecked=0, Total=4422 [2022-07-14 06:06:10,497 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 290 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:10,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 372 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:06:10,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-14 06:06:10,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-07-14 06:06:10,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:10,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-07-14 06:06:10,499 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 71 [2022-07-14 06:06:10,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:10,499 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-07-14 06:06:10,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 3.130434782608696) internal successors, (144), 47 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) [2022-07-14 06:06:10,500 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-07-14 06:06:10,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-14 06:06:10,500 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:10,500 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:10,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:10,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:10,716 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:06:10,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:10,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1193427278, now seen corresponding path program 14 times [2022-07-14 06:06:10,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:10,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047376841] [2022-07-14 06:06:10,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:10,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 19 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:11,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:11,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047376841] [2022-07-14 06:06:11,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047376841] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:11,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78608870] [2022-07-14 06:06:11,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:06:11,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:11,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:11,146 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:11,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-14 06:06:11,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:06:11,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:11,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-14 06:06:11,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:11,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:06:12,236 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:12,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-14 06:06:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 120 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:12,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:13,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:06:13,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:06:13,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:06:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 120 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:13,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78608870] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:13,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:13,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 66 [2022-07-14 06:06:13,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381896914] [2022-07-14 06:06:13,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:13,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-14 06:06:13,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:13,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-14 06:06:13,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=3965, Unknown=0, NotChecked=0, Total=4290 [2022-07-14 06:06:13,331 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 66 states, 66 states have (on average 2.696969696969697) internal successors, (178), 66 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:14,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:14,587 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2022-07-14 06:06:14,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-14 06:06:14,591 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.696969696969697) internal successors, (178), 66 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-07-14 06:06:14,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:14,593 INFO L225 Difference]: With dead ends: 118 [2022-07-14 06:06:14,593 INFO L226 Difference]: Without dead ends: 87 [2022-07-14 06:06:14,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=551, Invalid=6255, Unknown=0, NotChecked=0, Total=6806 [2022-07-14 06:06:14,595 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 86 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:14,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 789 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1150 Invalid, 0 Unknown, 209 Unchecked, 0.4s Time] [2022-07-14 06:06:14,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-14 06:06:14,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2022-07-14 06:06:14,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:14,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-07-14 06:06:14,598 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 74 [2022-07-14 06:06:14,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:14,598 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-07-14 06:06:14,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.696969696969697) internal successors, (178), 66 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:14,599 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-07-14 06:06:14,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-14 06:06:14,599 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:14,599 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:14,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:14,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:14,804 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:06:14,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:14,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1850755055, now seen corresponding path program 15 times [2022-07-14 06:06:14,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:14,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682155541] [2022-07-14 06:06:14,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:14,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 21 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:15,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:15,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682155541] [2022-07-14 06:06:15,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682155541] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:15,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132067972] [2022-07-14 06:06:15,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:06:15,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:15,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:15,273 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:15,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-14 06:06:15,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-07-14 06:06:15,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:15,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-14 06:06:15,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:15,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:06:15,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:06:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 21 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:15,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:15,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:06:15,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:06:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 21 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:16,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132067972] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:16,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:16,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 47 [2022-07-14 06:06:16,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302865511] [2022-07-14 06:06:16,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:16,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-14 06:06:16,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:16,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-14 06:06:16,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2036, Unknown=0, NotChecked=0, Total=2162 [2022-07-14 06:06:16,192 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 47 states, 47 states have (on average 2.9361702127659575) internal successors, (138), 47 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) [2022-07-14 06:06:17,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:17,490 INFO L93 Difference]: Finished difference Result 123 states and 124 transitions. [2022-07-14 06:06:17,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-14 06:06:17,491 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.9361702127659575) internal successors, (138), 47 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 81 [2022-07-14 06:06:17,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:17,491 INFO L225 Difference]: With dead ends: 123 [2022-07-14 06:06:17,491 INFO L226 Difference]: Without dead ends: 89 [2022-07-14 06:06:17,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 138 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=373, Invalid=4597, Unknown=0, NotChecked=0, Total=4970 [2022-07-14 06:06:17,492 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 172 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 1801 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:17,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 740 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1801 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-14 06:06:17,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-14 06:06:17,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2022-07-14 06:06:17,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 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) [2022-07-14 06:06:17,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2022-07-14 06:06:17,494 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 81 [2022-07-14 06:06:17,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:17,494 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2022-07-14 06:06:17,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.9361702127659575) internal successors, (138), 47 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) [2022-07-14 06:06:17,495 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2022-07-14 06:06:17,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-14 06:06:17,495 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:17,495 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:17,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-14 06:06:17,695 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,SelfDestructingSolverStorable24 [2022-07-14 06:06:17,696 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:06:17,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:17,696 INFO L85 PathProgramCache]: Analyzing trace with hash -680364340, now seen corresponding path program 16 times [2022-07-14 06:06:17,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:17,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677256946] [2022-07-14 06:06:17,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:17,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:17,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 153 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:18,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:18,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677256946] [2022-07-14 06:06:18,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677256946] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:18,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779508417] [2022-07-14 06:06:18,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:06:18,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:18,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:18,102 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:18,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-14 06:06:18,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:06:18,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:18,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-14 06:06:18,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:18,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:06:18,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:06:19,359 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:19,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-07-14 06:06:19,512 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 200 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:19,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:20,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:06:20,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:06:21,841 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 231 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:21,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779508417] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:21,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:21,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29, 29] total 81 [2022-07-14 06:06:21,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817522072] [2022-07-14 06:06:21,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:21,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-07-14 06:06:21,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:21,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-07-14 06:06:21,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=688, Invalid=5954, Unknown=0, NotChecked=0, Total=6642 [2022-07-14 06:06:21,844 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 82 states, 81 states have (on average 3.074074074074074) internal successors, (249), 82 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:23,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:23,542 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2022-07-14 06:06:23,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-14 06:06:23,543 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 3.074074074074074) internal successors, (249), 82 states have internal predecessors, (249), 0 states have call successors, (0), 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 [2022-07-14 06:06:23,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:23,544 INFO L225 Difference]: With dead ends: 94 [2022-07-14 06:06:23,544 INFO L226 Difference]: Without dead ends: 94 [2022-07-14 06:06:23,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1680, Invalid=8826, Unknown=0, NotChecked=0, Total=10506 [2022-07-14 06:06:23,545 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 414 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 1749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:23,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 604 Invalid, 1749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1536 Invalid, 0 Unknown, 27 Unchecked, 0.7s Time] [2022-07-14 06:06:23,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-14 06:06:23,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2022-07-14 06:06:23,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:23,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2022-07-14 06:06:23,547 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 85 [2022-07-14 06:06:23,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:23,548 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2022-07-14 06:06:23,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 3.074074074074074) internal successors, (249), 82 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:23,548 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2022-07-14 06:06:23,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-14 06:06:23,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:23,549 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:23,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:23,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-14 06:06:23,759 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:06:23,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:23,760 INFO L85 PathProgramCache]: Analyzing trace with hash 525430604, now seen corresponding path program 17 times [2022-07-14 06:06:23,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:23,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647381891] [2022-07-14 06:06:23,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:23,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:24,188 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 213 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:24,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:24,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647381891] [2022-07-14 06:06:24,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647381891] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:24,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851992071] [2022-07-14 06:06:24,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:06:24,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:24,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:24,190 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:24,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-14 06:06:24,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-14 06:06:24,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:24,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-14 06:06:24,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:24,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:06:25,181 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 247 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:25,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:25,841 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 247 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:25,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851992071] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:25,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:25,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 68 [2022-07-14 06:06:25,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24468981] [2022-07-14 06:06:25,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:25,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-14 06:06:25,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:25,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-14 06:06:25,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=3769, Unknown=0, NotChecked=0, Total=4556 [2022-07-14 06:06:25,843 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 68 states, 68 states have (on average 3.338235294117647) internal successors, (227), 68 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:26,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:26,693 INFO L93 Difference]: Finished difference Result 138 states and 139 transitions. [2022-07-14 06:06:26,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-14 06:06:26,694 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.338235294117647) internal successors, (227), 68 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-07-14 06:06:26,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:26,694 INFO L225 Difference]: With dead ends: 138 [2022-07-14 06:06:26,694 INFO L226 Difference]: Without dead ends: 99 [2022-07-14 06:06:26,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2132 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1615, Invalid=6941, Unknown=0, NotChecked=0, Total=8556 [2022-07-14 06:06:26,695 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 112 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:26,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 191 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:06:26,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-14 06:06:26,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2022-07-14 06:06:26,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 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) [2022-07-14 06:06:26,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2022-07-14 06:06:26,697 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 91 [2022-07-14 06:06:26,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:26,697 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2022-07-14 06:06:26,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.338235294117647) internal successors, (227), 68 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:26,697 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2022-07-14 06:06:26,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-14 06:06:26,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:26,699 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:26,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:26,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-14 06:06:26,919 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:06:26,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:26,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1484755479, now seen corresponding path program 18 times [2022-07-14 06:06:26,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:26,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219647463] [2022-07-14 06:06:26,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:26,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:27,549 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 25 proven. 498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:27,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:27,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219647463] [2022-07-14 06:06:27,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219647463] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:27,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998059787] [2022-07-14 06:06:27,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:06:27,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:27,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:27,552 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:27,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-14 06:06:27,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-07-14 06:06:27,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:27,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-14 06:06:27,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:28,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:06:28,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:06:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 25 proven. 498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:28,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:28,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:06:28,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:06:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 25 proven. 498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:28,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998059787] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:28,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:28,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 53 [2022-07-14 06:06:28,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278953604] [2022-07-14 06:06:28,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:28,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-14 06:06:28,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:28,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-14 06:06:28,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2616, Unknown=0, NotChecked=0, Total=2756 [2022-07-14 06:06:28,875 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 53 states, 53 states have (on average 3.018867924528302) internal successors, (160), 53 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:30,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:30,389 INFO L93 Difference]: Finished difference Result 143 states and 144 transitions. [2022-07-14 06:06:30,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-14 06:06:30,389 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.018867924528302) internal successors, (160), 53 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-07-14 06:06:30,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:30,390 INFO L225 Difference]: With dead ends: 143 [2022-07-14 06:06:30,390 INFO L226 Difference]: Without dead ends: 103 [2022-07-14 06:06:30,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 160 SyntacticMatches, 9 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=373, Invalid=6107, Unknown=0, NotChecked=0, Total=6480 [2022-07-14 06:06:30,391 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 187 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 2251 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 2393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:30,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 949 Invalid, 2393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2251 Invalid, 0 Unknown, 66 Unchecked, 0.7s Time] [2022-07-14 06:06:30,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-14 06:06:30,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2022-07-14 06:06:30,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 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) [2022-07-14 06:06:30,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2022-07-14 06:06:30,394 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2022-07-14 06:06:30,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:30,394 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2022-07-14 06:06:30,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.018867924528302) internal successors, (160), 53 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:30,395 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2022-07-14 06:06:30,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-14 06:06:30,395 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:30,395 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:30,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:30,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:30,611 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:06:30,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:30,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1822742022, now seen corresponding path program 19 times [2022-07-14 06:06:30,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:30,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332339301] [2022-07-14 06:06:30,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:30,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:31,163 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 231 proven. 341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:31,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:31,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332339301] [2022-07-14 06:06:31,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332339301] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:31,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190189944] [2022-07-14 06:06:31,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:06:31,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:31,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:31,165 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:31,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-14 06:06:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:31,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-14 06:06:31,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 276 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:31,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:32,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:06:32,467 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 276 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:32,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190189944] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:32,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:32,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31, 31] total 62 [2022-07-14 06:06:32,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257234411] [2022-07-14 06:06:32,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:32,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-14 06:06:32,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:32,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-14 06:06:32,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=3508, Unknown=0, NotChecked=0, Total=3906 [2022-07-14 06:06:32,470 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 63 states, 62 states have (on average 3.225806451612903) internal successors, (200), 63 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) [2022-07-14 06:06:33,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:33,805 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2022-07-14 06:06:33,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-14 06:06:33,806 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 3.225806451612903) internal successors, (200), 63 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-07-14 06:06:33,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:33,806 INFO L225 Difference]: With dead ends: 105 [2022-07-14 06:06:33,806 INFO L226 Difference]: Without dead ends: 105 [2022-07-14 06:06:33,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1496, Invalid=6694, Unknown=0, NotChecked=0, Total=8190 [2022-07-14 06:06:33,807 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 244 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 1655 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:33,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 657 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1655 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-14 06:06:33,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-14 06:06:33,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2022-07-14 06:06:33,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:33,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-07-14 06:06:33,810 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 99 [2022-07-14 06:06:33,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:33,810 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-07-14 06:06:33,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 3.225806451612903) internal successors, (200), 63 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) [2022-07-14 06:06:33,810 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-07-14 06:06:33,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-14 06:06:33,811 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:33,811 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:33,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:34,015 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,SelfDestructingSolverStorable28 [2022-07-14 06:06:34,015 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:06:34,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:34,016 INFO L85 PathProgramCache]: Analyzing trace with hash 36035262, now seen corresponding path program 20 times [2022-07-14 06:06:34,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:34,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227022189] [2022-07-14 06:06:34,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:34,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 27 proven. 585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:34,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:34,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227022189] [2022-07-14 06:06:34,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227022189] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:34,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667150611] [2022-07-14 06:06:34,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:06:34,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:34,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:34,622 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:34,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-14 06:06:34,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:06:34,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:34,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-14 06:06:34,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:35,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:06:36,304 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:36,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-14 06:06:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 276 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:36,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:37,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:06:37,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:06:37,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:06:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 276 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:37,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667150611] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:37,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:37,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 86 [2022-07-14 06:06:37,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905310940] [2022-07-14 06:06:37,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:37,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-14 06:06:37,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:37,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-14 06:06:37,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=6791, Unknown=0, NotChecked=0, Total=7310 [2022-07-14 06:06:37,902 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 86 states, 86 states have (on average 2.86046511627907) internal successors, (246), 86 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:39,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:39,715 INFO L93 Difference]: Finished difference Result 158 states and 159 transitions. [2022-07-14 06:06:39,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-14 06:06:39,715 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.86046511627907) internal successors, (246), 86 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-07-14 06:06:39,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:39,716 INFO L225 Difference]: With dead ends: 158 [2022-07-14 06:06:39,716 INFO L226 Difference]: Without dead ends: 115 [2022-07-14 06:06:39,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 175 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1907 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=847, Invalid=10495, Unknown=0, NotChecked=0, Total=11342 [2022-07-14 06:06:39,718 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 110 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 2028 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1374 SdHoareTripleChecker+Invalid, 2318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:39,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1374 Invalid, 2318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2028 Invalid, 0 Unknown, 272 Unchecked, 0.7s Time] [2022-07-14 06:06:39,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-14 06:06:39,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2022-07-14 06:06:39,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 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) [2022-07-14 06:06:39,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2022-07-14 06:06:39,720 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 102 [2022-07-14 06:06:39,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:39,721 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2022-07-14 06:06:39,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.86046511627907) internal successors, (246), 86 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:39,721 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2022-07-14 06:06:39,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-14 06:06:39,722 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:39,722 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:39,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:39,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:39,932 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:06:39,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:39,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1641325283, now seen corresponding path program 21 times [2022-07-14 06:06:39,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:39,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942044757] [2022-07-14 06:06:39,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:39,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 29 proven. 679 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:40,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:40,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942044757] [2022-07-14 06:06:40,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942044757] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:40,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506967259] [2022-07-14 06:06:40,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:06:40,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:40,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:40,598 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:40,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-14 06:06:40,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-07-14 06:06:40,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:40,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 108 conjunts are in the unsatisfiable core [2022-07-14 06:06:40,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:41,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:06:41,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:06:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 29 proven. 679 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:41,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:41,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:06:41,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:06:42,211 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 29 proven. 679 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:42,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506967259] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:42,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:42,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 59 [2022-07-14 06:06:42,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21870170] [2022-07-14 06:06:42,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:42,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-14 06:06:42,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:42,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-14 06:06:42,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=3268, Unknown=0, NotChecked=0, Total=3422 [2022-07-14 06:06:42,213 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 59 states, 59 states have (on average 3.0847457627118646) internal successors, (182), 59 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) [2022-07-14 06:06:44,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:44,303 INFO L93 Difference]: Finished difference Result 163 states and 164 transitions. [2022-07-14 06:06:44,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-14 06:06:44,303 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.0847457627118646) internal successors, (182), 59 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 109 [2022-07-14 06:06:44,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:44,304 INFO L225 Difference]: With dead ends: 163 [2022-07-14 06:06:44,304 INFO L226 Difference]: Without dead ends: 117 [2022-07-14 06:06:44,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 184 SyntacticMatches, 11 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=477, Invalid=7713, Unknown=0, NotChecked=0, Total=8190 [2022-07-14 06:06:44,305 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 201 mSDsluCounter, 1246 mSDsCounter, 0 mSdLazyCounter, 3149 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 3236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 3149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:44,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 1279 Invalid, 3236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 3149 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-14 06:06:44,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-14 06:06:44,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2022-07-14 06:06:44,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:44,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2022-07-14 06:06:44,307 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 109 [2022-07-14 06:06:44,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:44,308 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2022-07-14 06:06:44,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.0847457627118646) internal successors, (182), 59 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) [2022-07-14 06:06:44,308 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2022-07-14 06:06:44,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-14 06:06:44,308 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:44,308 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:44,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-14 06:06:44,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:44,509 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:06:44,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:44,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1459743680, now seen corresponding path program 22 times [2022-07-14 06:06:44,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:44,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590059360] [2022-07-14 06:06:44,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:44,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 325 proven. 440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:45,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:45,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590059360] [2022-07-14 06:06:45,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590059360] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:45,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885524084] [2022-07-14 06:06:45,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:06:45,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:45,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:45,173 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:45,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-14 06:06:45,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:06:45,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:45,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 103 conjunts are in the unsatisfiable core [2022-07-14 06:06:45,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:45,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:06:45,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:06:46,457 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:46,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-07-14 06:06:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 392 proven. 373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:46,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:47,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:06:47,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:06:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 435 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:49,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885524084] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:49,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:49,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 37, 37] total 92 [2022-07-14 06:06:49,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362891417] [2022-07-14 06:06:49,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:49,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-07-14 06:06:49,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:49,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-07-14 06:06:49,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=7627, Unknown=0, NotChecked=0, Total=8556 [2022-07-14 06:06:49,882 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 93 states, 92 states have (on average 3.0543478260869565) internal successors, (281), 93 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:52,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:52,141 INFO L93 Difference]: Finished difference Result 122 states and 123 transitions. [2022-07-14 06:06:52,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-14 06:06:52,142 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 92 states have (on average 3.0543478260869565) internal successors, (281), 93 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-07-14 06:06:52,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:52,142 INFO L225 Difference]: With dead ends: 122 [2022-07-14 06:06:52,142 INFO L226 Difference]: Without dead ends: 122 [2022-07-14 06:06:52,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2152 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2175, Invalid=11397, Unknown=0, NotChecked=0, Total=13572 [2022-07-14 06:06:52,144 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 311 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 2287 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 2478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 2287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:52,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 901 Invalid, 2478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 2287 Invalid, 0 Unknown, 46 Unchecked, 1.0s Time] [2022-07-14 06:06:52,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-14 06:06:52,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2022-07-14 06:06:52,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 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) [2022-07-14 06:06:52,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2022-07-14 06:06:52,146 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 113 [2022-07-14 06:06:52,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:52,147 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2022-07-14 06:06:52,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 92 states have (on average 3.0543478260869565) internal successors, (281), 93 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:52,147 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2022-07-14 06:06:52,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-14 06:06:52,148 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:52,148 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:52,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-14 06:06:52,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:52,363 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:06:52,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:52,364 INFO L85 PathProgramCache]: Analyzing trace with hash -2025445952, now seen corresponding path program 23 times [2022-07-14 06:06:52,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:52,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471962412] [2022-07-14 06:06:52,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:52,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 379 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:52,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:52,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471962412] [2022-07-14 06:06:52,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471962412] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:52,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693081805] [2022-07-14 06:06:52,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:06:52,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:52,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:52,972 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:52,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-14 06:06:53,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-07-14 06:06:53,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:53,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-14 06:06:53,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:53,186 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:06:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 425 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:54,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 425 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:55,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693081805] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:55,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:55,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 89 [2022-07-14 06:06:55,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203045709] [2022-07-14 06:06:55,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:55,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-07-14 06:06:55,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:55,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-07-14 06:06:55,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1440, Invalid=6392, Unknown=0, NotChecked=0, Total=7832 [2022-07-14 06:06:55,578 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 89 states, 89 states have (on average 3.359550561797753) internal successors, (299), 89 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:56,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:56,245 INFO L93 Difference]: Finished difference Result 178 states and 179 transitions. [2022-07-14 06:06:56,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-14 06:06:56,246 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.359550561797753) internal successors, (299), 89 states have internal predecessors, (299), 0 states have call successors, (0), 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 119 [2022-07-14 06:06:56,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:56,246 INFO L225 Difference]: With dead ends: 178 [2022-07-14 06:06:56,246 INFO L226 Difference]: Without dead ends: 127 [2022-07-14 06:06:56,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2776 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2316, Invalid=9026, Unknown=0, NotChecked=0, Total=11342 [2022-07-14 06:06:56,248 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 124 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:56,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 219 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:06:56,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-14 06:06:56,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2022-07-14 06:06:56,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:56,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2022-07-14 06:06:56,250 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 119 [2022-07-14 06:06:56,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:56,251 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2022-07-14 06:06:56,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.359550561797753) internal successors, (299), 89 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:56,251 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2022-07-14 06:06:56,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-14 06:06:56,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:56,252 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:56,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:56,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:56,467 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:06:56,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:56,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1188346147, now seen corresponding path program 24 times [2022-07-14 06:06:56,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:56,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884323283] [2022-07-14 06:06:56,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:56,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:57,284 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 33 proven. 888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:57,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:57,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884323283] [2022-07-14 06:06:57,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884323283] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:57,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891674882] [2022-07-14 06:06:57,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:06:57,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:57,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:57,285 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:57,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-14 06:06:58,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-07-14 06:06:58,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:58,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 120 conjunts are in the unsatisfiable core [2022-07-14 06:06:58,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:58,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:06:58,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:06:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 33 proven. 888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:58,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:59,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:06:59,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:06:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 33 proven. 888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:59,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891674882] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:59,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:59,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 65 [2022-07-14 06:06:59,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746607383] [2022-07-14 06:06:59,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:59,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-14 06:06:59,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:59,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-14 06:06:59,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3992, Unknown=0, NotChecked=0, Total=4160 [2022-07-14 06:06:59,492 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 65 states, 65 states have (on average 3.1384615384615384) internal successors, (204), 65 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:01,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:01,991 INFO L93 Difference]: Finished difference Result 183 states and 184 transitions. [2022-07-14 06:07:01,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-14 06:07:01,991 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.1384615384615384) internal successors, (204), 65 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2022-07-14 06:07:01,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:01,992 INFO L225 Difference]: With dead ends: 183 [2022-07-14 06:07:01,992 INFO L226 Difference]: Without dead ends: 131 [2022-07-14 06:07:01,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 210 SyntacticMatches, 11 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=461, Invalid=9639, Unknown=0, NotChecked=0, Total=10100 [2022-07-14 06:07:01,992 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 159 mSDsluCounter, 1637 mSDsCounter, 0 mSdLazyCounter, 4042 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 4184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 4042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:01,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 1674 Invalid, 4184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 4042 Invalid, 0 Unknown, 75 Unchecked, 1.3s Time] [2022-07-14 06:07:01,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-14 06:07:01,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2022-07-14 06:07:01,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:01,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2022-07-14 06:07:01,995 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 123 [2022-07-14 06:07:01,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:01,995 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2022-07-14 06:07:01,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.1384615384615384) internal successors, (204), 65 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:01,995 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2022-07-14 06:07:01,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-14 06:07:01,996 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:01,996 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:02,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-14 06:07:02,203 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,SelfDestructingSolverStorable33 [2022-07-14 06:07:02,204 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:07:02,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:02,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1127256442, now seen corresponding path program 25 times [2022-07-14 06:07:02,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:02,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264413482] [2022-07-14 06:07:02,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:02,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 435 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:02,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:02,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264413482] [2022-07-14 06:07:02,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264413482] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:02,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722841486] [2022-07-14 06:07:02,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:07:02,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:02,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:02,895 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:02,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-14 06:07:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:03,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-14 06:07:03,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 496 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:03,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:07:04,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:07:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 496 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:04,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722841486] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:07:04,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:07:04,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 39, 39] total 78 [2022-07-14 06:07:04,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722782223] [2022-07-14 06:07:04,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:07:04,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-07-14 06:07:04,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:07:04,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-07-14 06:07:04,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=612, Invalid=5550, Unknown=0, NotChecked=0, Total=6162 [2022-07-14 06:07:04,770 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 79 states, 78 states have (on average 3.282051282051282) internal successors, (256), 79 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:06,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:06,741 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2022-07-14 06:07:06,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-14 06:07:06,741 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 3.282051282051282) internal successors, (256), 79 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2022-07-14 06:07:06,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:06,742 INFO L225 Difference]: With dead ends: 133 [2022-07-14 06:07:06,742 INFO L226 Difference]: Without dead ends: 133 [2022-07-14 06:07:06,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 210 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2084 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2382, Invalid=10728, Unknown=0, NotChecked=0, Total=13110 [2022-07-14 06:07:06,742 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 552 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 2291 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 2531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 2291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:06,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 918 Invalid, 2531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 2291 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-14 06:07:06,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-07-14 06:07:06,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2022-07-14 06:07:06,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:06,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2022-07-14 06:07:06,745 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 127 [2022-07-14 06:07:06,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:06,745 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2022-07-14 06:07:06,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 3.282051282051282) internal successors, (256), 79 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:06,745 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2022-07-14 06:07:06,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-14 06:07:06,746 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:06,746 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:06,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-14 06:07:06,955 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,SelfDestructingSolverStorable34 [2022-07-14 06:07:06,955 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:07:06,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:06,956 INFO L85 PathProgramCache]: Analyzing trace with hash -252642614, now seen corresponding path program 26 times [2022-07-14 06:07:06,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:06,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296738404] [2022-07-14 06:07:06,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:06,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:07,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 35 proven. 1003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:07,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:07,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296738404] [2022-07-14 06:07:07,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296738404] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:07,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262870320] [2022-07-14 06:07:07,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:07:07,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:07,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:07,825 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:07,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-14 06:07:07,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:07:07,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:07:07,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 111 conjunts are in the unsatisfiable core [2022-07-14 06:07:07,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:08,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:07:10,225 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:07:10,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-14 06:07:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 496 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:10,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:07:12,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:07:12,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:07:12,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-07-14 06:07:12,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 496 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:12,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262870320] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:07:12,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:07:12,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 106 [2022-07-14 06:07:12,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191722291] [2022-07-14 06:07:12,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:07:12,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-07-14 06:07:12,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:07:12,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-07-14 06:07:12,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=10369, Unknown=0, NotChecked=0, Total=11130 [2022-07-14 06:07:12,402 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 106 states, 106 states have (on average 2.9622641509433962) internal successors, (314), 106 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:16,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:16,953 INFO L93 Difference]: Finished difference Result 198 states and 199 transitions. [2022-07-14 06:07:16,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-14 06:07:16,953 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.9622641509433962) internal successors, (314), 106 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2022-07-14 06:07:16,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:16,954 INFO L225 Difference]: With dead ends: 198 [2022-07-14 06:07:16,954 INFO L226 Difference]: Without dead ends: 143 [2022-07-14 06:07:16,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 227 SyntacticMatches, 3 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2906 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1207, Invalid=15823, Unknown=0, NotChecked=0, Total=17030 [2022-07-14 06:07:16,955 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 134 mSDsluCounter, 1853 mSDsCounter, 0 mSdLazyCounter, 2974 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1893 SdHoareTripleChecker+Invalid, 3205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:16,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 1893 Invalid, 3205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2974 Invalid, 0 Unknown, 208 Unchecked, 1.0s Time] [2022-07-14 06:07:16,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-14 06:07:16,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 138. [2022-07-14 06:07:16,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:16,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2022-07-14 06:07:16,958 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 130 [2022-07-14 06:07:16,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:16,958 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2022-07-14 06:07:16,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.9622641509433962) internal successors, (314), 106 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:16,958 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2022-07-14 06:07:16,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-07-14 06:07:16,959 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:16,959 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:16,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-14 06:07:17,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-14 06:07:17,167 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:07:17,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:17,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1899841065, now seen corresponding path program 27 times [2022-07-14 06:07:17,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:17,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318027442] [2022-07-14 06:07:17,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:17,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 37 proven. 1125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:18,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:18,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318027442] [2022-07-14 06:07:18,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318027442] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:18,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357742100] [2022-07-14 06:07:18,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:07:18,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:18,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:18,202 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:18,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-14 06:07:18,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-07-14 06:07:18,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:07:18,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 132 conjunts are in the unsatisfiable core [2022-07-14 06:07:18,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:19,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:07:19,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:07:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 37 proven. 1125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:19,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:07:20,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:07:20,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:07:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 37 proven. 1125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:20,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357742100] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:07:20,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:07:20,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 71 [2022-07-14 06:07:20,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445463228] [2022-07-14 06:07:20,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:07:20,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-14 06:07:20,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:07:20,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-14 06:07:20,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=4788, Unknown=0, NotChecked=0, Total=4970 [2022-07-14 06:07:20,674 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 71 states, 71 states have (on average 3.183098591549296) internal successors, (226), 71 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) [2022-07-14 06:07:23,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:23,698 INFO L93 Difference]: Finished difference Result 203 states and 204 transitions. [2022-07-14 06:07:23,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-14 06:07:23,698 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.183098591549296) internal successors, (226), 71 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 137 [2022-07-14 06:07:23,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:23,699 INFO L225 Difference]: With dead ends: 203 [2022-07-14 06:07:23,699 INFO L226 Difference]: Without dead ends: 145 [2022-07-14 06:07:23,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 234 SyntacticMatches, 13 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1567 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=581, Invalid=11629, Unknown=0, NotChecked=0, Total=12210 [2022-07-14 06:07:23,701 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 254 mSDsluCounter, 1793 mSDsCounter, 0 mSdLazyCounter, 4473 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 1834 SdHoareTripleChecker+Invalid, 4648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 4473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:23,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 1834 Invalid, 4648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 4473 Invalid, 0 Unknown, 63 Unchecked, 1.5s Time] [2022-07-14 06:07:23,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-07-14 06:07:23,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2022-07-14 06:07:23,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:23,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2022-07-14 06:07:23,704 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 137 [2022-07-14 06:07:23,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:23,705 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2022-07-14 06:07:23,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.183098591549296) internal successors, (226), 71 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) [2022-07-14 06:07:23,705 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2022-07-14 06:07:23,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-14 06:07:23,706 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:23,706 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:23,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-14 06:07:23,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:23,919 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:07:23,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:23,920 INFO L85 PathProgramCache]: Analyzing trace with hash 877571508, now seen corresponding path program 28 times [2022-07-14 06:07:23,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:23,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411368692] [2022-07-14 06:07:23,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:23,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 561 proven. 674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:24,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:24,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411368692] [2022-07-14 06:07:24,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411368692] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:24,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869587549] [2022-07-14 06:07:24,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:07:24,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:24,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:24,796 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:24,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-14 06:07:24,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:07:24,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:07:24,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 123 conjunts are in the unsatisfiable core [2022-07-14 06:07:24,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:24,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:07:25,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:07:26,543 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:07:26,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-07-14 06:07:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 648 proven. 587 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:26,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:07:28,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:07:28,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:07:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 703 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:31,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869587549] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:07:31,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:07:31,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 45, 45] total 112 [2022-07-14 06:07:31,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335095046] [2022-07-14 06:07:31,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:07:31,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-07-14 06:07:31,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:07:31,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-07-14 06:07:31,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1351, Invalid=11305, Unknown=0, NotChecked=0, Total=12656 [2022-07-14 06:07:31,236 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand has 113 states, 112 states have (on average 3.1160714285714284) internal successors, (349), 113 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:34,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:34,096 INFO L93 Difference]: Finished difference Result 150 states and 151 transitions. [2022-07-14 06:07:34,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-14 06:07:34,096 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 112 states have (on average 3.1160714285714284) internal successors, (349), 113 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2022-07-14 06:07:34,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:34,097 INFO L225 Difference]: With dead ends: 150 [2022-07-14 06:07:34,097 INFO L226 Difference]: Without dead ends: 150 [2022-07-14 06:07:34,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3225 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=3041, Invalid=16699, Unknown=0, NotChecked=0, Total=19740 [2022-07-14 06:07:34,098 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 404 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 3200 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 3416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 3200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:34,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 1293 Invalid, 3416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 3200 Invalid, 0 Unknown, 50 Unchecked, 1.3s Time] [2022-07-14 06:07:34,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-14 06:07:34,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2022-07-14 06:07:34,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:34,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2022-07-14 06:07:34,101 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 141 [2022-07-14 06:07:34,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:34,101 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2022-07-14 06:07:34,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 112 states have (on average 3.1160714285714284) internal successors, (349), 113 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:34,102 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2022-07-14 06:07:34,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-14 06:07:34,102 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:34,102 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:34,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-14 06:07:34,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-14 06:07:34,315 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:07:34,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:34,316 INFO L85 PathProgramCache]: Analyzing trace with hash -397223884, now seen corresponding path program 29 times [2022-07-14 06:07:34,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:34,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696555879] [2022-07-14 06:07:34,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:34,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 593 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:35,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:35,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696555879] [2022-07-14 06:07:35,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696555879] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:35,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421865117] [2022-07-14 06:07:35,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:07:35,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:35,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:35,080 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:35,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-14 06:07:35,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-07-14 06:07:35,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:07:35,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-14 06:07:35,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:35,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:07:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 651 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:37,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:07:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 651 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:38,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421865117] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:07:38,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:07:38,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 108 [2022-07-14 06:07:38,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390663201] [2022-07-14 06:07:38,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:07:38,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-07-14 06:07:38,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:07:38,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-07-14 06:07:38,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1939, Invalid=9617, Unknown=0, NotChecked=0, Total=11556 [2022-07-14 06:07:38,922 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 108 states, 108 states have (on average 3.435185185185185) internal successors, (371), 108 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:40,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:40,642 INFO L93 Difference]: Finished difference Result 218 states and 219 transitions. [2022-07-14 06:07:40,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-14 06:07:40,642 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 3.435185185185185) internal successors, (371), 108 states have internal predecessors, (371), 0 states have call successors, (0), 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 147 [2022-07-14 06:07:40,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:40,643 INFO L225 Difference]: With dead ends: 218 [2022-07-14 06:07:40,643 INFO L226 Difference]: Without dead ends: 155 [2022-07-14 06:07:40,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5796 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4027, Invalid=18025, Unknown=0, NotChecked=0, Total=22052 [2022-07-14 06:07:40,644 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 159 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:40,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 339 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:07:40,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-14 06:07:40,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2022-07-14 06:07:40,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:40,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2022-07-14 06:07:40,647 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 147 [2022-07-14 06:07:40,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:40,647 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2022-07-14 06:07:40,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 3.435185185185185) internal successors, (371), 108 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:40,648 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2022-07-14 06:07:40,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-14 06:07:40,648 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:40,649 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:40,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-07-14 06:07:40,863 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,SelfDestructingSolverStorable38 [2022-07-14 06:07:40,863 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:07:40,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:40,864 INFO L85 PathProgramCache]: Analyzing trace with hash -80127023, now seen corresponding path program 30 times [2022-07-14 06:07:40,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:40,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158832584] [2022-07-14 06:07:40,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:40,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 41 proven. 1390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:42,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:42,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158832584] [2022-07-14 06:07:42,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158832584] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:42,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508554886] [2022-07-14 06:07:42,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:07:42,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:42,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:42,060 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:42,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-14 06:07:43,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-07-14 06:07:43,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:07:43,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 144 conjunts are in the unsatisfiable core [2022-07-14 06:07:43,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:44,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:07:44,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:07:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 41 proven. 1390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:44,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:07:44,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:07:44,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:07:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 41 proven. 1390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:45,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508554886] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:07:45,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:07:45,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 77 [2022-07-14 06:07:45,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109576876] [2022-07-14 06:07:45,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:07:45,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-07-14 06:07:45,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:07:45,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-07-14 06:07:45,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=5656, Unknown=0, NotChecked=0, Total=5852 [2022-07-14 06:07:45,462 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 77 states, 77 states have (on average 3.220779220779221) internal successors, (248), 77 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:49,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:49,047 INFO L93 Difference]: Finished difference Result 223 states and 224 transitions. [2022-07-14 06:07:49,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-14 06:07:49,052 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.220779220779221) internal successors, (248), 77 states have internal predecessors, (248), 0 states have call successors, (0), 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 151 [2022-07-14 06:07:49,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:49,053 INFO L225 Difference]: With dead ends: 223 [2022-07-14 06:07:49,053 INFO L226 Difference]: Without dead ends: 159 [2022-07-14 06:07:49,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 256 SyntacticMatches, 17 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1936 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=633, Invalid=13887, Unknown=0, NotChecked=0, Total=14520 [2022-07-14 06:07:49,054 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 221 mSDsluCounter, 2245 mSDsCounter, 0 mSdLazyCounter, 5622 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 2290 SdHoareTripleChecker+Invalid, 5791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 5622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:49,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 2290 Invalid, 5791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 5622 Invalid, 0 Unknown, 67 Unchecked, 1.8s Time] [2022-07-14 06:07:49,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-14 06:07:49,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2022-07-14 06:07:49,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 155 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) [2022-07-14 06:07:49,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2022-07-14 06:07:49,057 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 151 [2022-07-14 06:07:49,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:49,057 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2022-07-14 06:07:49,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.220779220779221) internal successors, (248), 77 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:49,058 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2022-07-14 06:07:49,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-07-14 06:07:49,058 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:49,058 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:49,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-14 06:07:49,275 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,SelfDestructingSolverStorable39 [2022-07-14 06:07:49,276 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:07:49,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:49,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1774897390, now seen corresponding path program 31 times [2022-07-14 06:07:49,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:49,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345843136] [2022-07-14 06:07:49,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:49,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:49,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:50,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 703 proven. 809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:50,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:50,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345843136] [2022-07-14 06:07:50,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345843136] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:50,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99855335] [2022-07-14 06:07:50,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:07:50,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:50,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:50,223 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:50,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-14 06:07:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:50,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 120 conjunts are in the unsatisfiable core [2022-07-14 06:07:50,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 780 proven. 732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:51,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:07:52,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:07:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 780 proven. 732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:52,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99855335] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:07:52,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:07:52,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 47, 47] total 95 [2022-07-14 06:07:52,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693243986] [2022-07-14 06:07:52,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:07:52,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-07-14 06:07:52,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:07:52,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-07-14 06:07:52,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1110, Invalid=8010, Unknown=0, NotChecked=0, Total=9120 [2022-07-14 06:07:52,469 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand has 96 states, 95 states have (on average 3.2842105263157895) internal successors, (312), 96 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:54,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:54,399 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2022-07-14 06:07:54,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-14 06:07:54,399 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 3.2842105263157895) internal successors, (312), 96 states have internal predecessors, (312), 0 states have call successors, (0), 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 155 [2022-07-14 06:07:54,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:54,400 INFO L225 Difference]: With dead ends: 161 [2022-07-14 06:07:54,400 INFO L226 Difference]: Without dead ends: 161 [2022-07-14 06:07:54,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 258 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3807 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2586, Invalid=11694, Unknown=0, NotChecked=0, Total=14280 [2022-07-14 06:07:54,402 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 502 mSDsluCounter, 1359 mSDsCounter, 0 mSdLazyCounter, 3540 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 1406 SdHoareTripleChecker+Invalid, 3754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 3540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:54,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 1406 Invalid, 3754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 3540 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-14 06:07:54,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-14 06:07:54,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2022-07-14 06:07:54,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:54,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2022-07-14 06:07:54,404 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 155 [2022-07-14 06:07:54,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:54,405 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2022-07-14 06:07:54,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 3.2842105263157895) internal successors, (312), 96 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:54,405 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2022-07-14 06:07:54,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-07-14 06:07:54,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:54,406 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:54,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-14 06:07:54,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:54,607 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:07:54,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:54,607 INFO L85 PathProgramCache]: Analyzing trace with hash 625745622, now seen corresponding path program 32 times [2022-07-14 06:07:54,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:54,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115771057] [2022-07-14 06:07:54,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:54,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:55,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 43 proven. 1533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:55,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:55,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115771057] [2022-07-14 06:07:55,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115771057] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:55,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265239686] [2022-07-14 06:07:55,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:07:55,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:55,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:55,793 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:55,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-14 06:07:55,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:07:55,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:07:55,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 131 conjunts are in the unsatisfiable core [2022-07-14 06:07:55,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:56,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:07:59,394 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:07:59,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-14 06:07:59,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 780 proven. 796 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:59,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:08:02,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:08:02,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:08:02,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-07-14 06:08:02,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 780 proven. 796 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:02,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265239686] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:08:02,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:08:02,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 126 [2022-07-14 06:08:02,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886136492] [2022-07-14 06:08:02,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:08:02,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-07-14 06:08:02,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:08:02,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-07-14 06:08:02,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1051, Invalid=14699, Unknown=0, NotChecked=0, Total=15750 [2022-07-14 06:08:02,364 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand has 126 states, 126 states have (on average 3.0317460317460316) internal successors, (382), 126 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:05,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:05,876 INFO L93 Difference]: Finished difference Result 238 states and 239 transitions. [2022-07-14 06:08:05,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-14 06:08:05,877 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 3.0317460317460316) internal successors, (382), 126 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2022-07-14 06:08:05,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:05,878 INFO L225 Difference]: With dead ends: 238 [2022-07-14 06:08:05,878 INFO L226 Difference]: Without dead ends: 171 [2022-07-14 06:08:05,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 279 SyntacticMatches, 3 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4111 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1631, Invalid=22239, Unknown=0, NotChecked=0, Total=23870 [2022-07-14 06:08:05,879 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 159 mSDsluCounter, 2622 mSDsCounter, 0 mSdLazyCounter, 3965 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 2670 SdHoareTripleChecker+Invalid, 4346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 3965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 353 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:05,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 2670 Invalid, 4346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 3965 Invalid, 0 Unknown, 353 Unchecked, 1.4s Time] [2022-07-14 06:08:05,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-14 06:08:05,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 166. [2022-07-14 06:08:05,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.0121212121212122) internal successors, (167), 165 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:05,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2022-07-14 06:08:05,882 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 158 [2022-07-14 06:08:05,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:05,882 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2022-07-14 06:08:05,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 3.0317460317460316) internal successors, (382), 126 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:05,882 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2022-07-14 06:08:05,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-07-14 06:08:05,883 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:05,883 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:05,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-14 06:08:06,095 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,SelfDestructingSolverStorable41 [2022-07-14 06:08:06,095 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:08:06,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:06,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1064465205, now seen corresponding path program 33 times [2022-07-14 06:08:06,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:08:06,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859302840] [2022-07-14 06:08:06,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:06,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:08:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:07,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 45 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:07,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:08:07,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859302840] [2022-07-14 06:08:07,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859302840] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:08:07,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319673881] [2022-07-14 06:08:07,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:08:07,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:08:07,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:08:07,418 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:08:07,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-14 06:08:08,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-07-14 06:08:08,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:08:08,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 154 conjunts are in the unsatisfiable core [2022-07-14 06:08:08,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:09,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:08:10,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:08:10,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 45 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:10,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:08:10,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:08:10,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:08:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 45 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:11,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319673881] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:08:11,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:08:11,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 83 [2022-07-14 06:08:11,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860051603] [2022-07-14 06:08:11,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:08:11,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-07-14 06:08:11,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:08:11,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-07-14 06:08:11,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=6596, Unknown=0, NotChecked=0, Total=6806 [2022-07-14 06:08:11,176 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand has 83 states, 83 states have (on average 3.253012048192771) internal successors, (270), 83 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:15,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:15,573 INFO L93 Difference]: Finished difference Result 243 states and 244 transitions. [2022-07-14 06:08:15,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-07-14 06:08:15,573 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.253012048192771) internal successors, (270), 83 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2022-07-14 06:08:15,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:15,574 INFO L225 Difference]: With dead ends: 243 [2022-07-14 06:08:15,574 INFO L226 Difference]: Without dead ends: 173 [2022-07-14 06:08:15,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 284 SyntacticMatches, 15 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2161 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=685, Invalid=16345, Unknown=0, NotChecked=0, Total=17030 [2022-07-14 06:08:15,576 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 250 mSDsluCounter, 2867 mSDsCounter, 0 mSdLazyCounter, 7187 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 2916 SdHoareTripleChecker+Invalid, 7375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 7187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:15,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 2916 Invalid, 7375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 7187 Invalid, 0 Unknown, 75 Unchecked, 2.3s Time] [2022-07-14 06:08:15,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-14 06:08:15,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2022-07-14 06:08:15,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.0118343195266273) internal successors, (171), 169 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:15,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 171 transitions. [2022-07-14 06:08:15,579 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 171 transitions. Word has length 165 [2022-07-14 06:08:15,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:15,579 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 171 transitions. [2022-07-14 06:08:15,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.253012048192771) internal successors, (270), 83 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:15,579 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 171 transitions. [2022-07-14 06:08:15,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-14 06:08:15,580 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:15,580 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:15,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-14 06:08:15,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:08:15,804 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:08:15,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:15,804 INFO L85 PathProgramCache]: Analyzing trace with hash 2004304680, now seen corresponding path program 34 times [2022-07-14 06:08:15,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:08:15,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777054076] [2022-07-14 06:08:15,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:15,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:08:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:16,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 861 proven. 956 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:16,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:08:16,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777054076] [2022-07-14 06:08:16,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777054076] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:08:16,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083679105] [2022-07-14 06:08:16,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:08:16,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:08:16,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:08:16,904 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:08:16,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-14 06:08:17,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:08:17,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:08:17,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 143 conjunts are in the unsatisfiable core [2022-07-14 06:08:17,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:17,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:08:18,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:08:20,391 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:08:20,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-07-14 06:08:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 968 proven. 849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:20,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:08:23,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:08:23,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:08:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 1035 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:27,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083679105] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:08:27,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:08:27,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 53, 53] total 153 [2022-07-14 06:08:27,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758791474] [2022-07-14 06:08:27,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:08:27,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2022-07-14 06:08:27,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:08:27,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2022-07-14 06:08:27,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2350, Invalid=21212, Unknown=0, NotChecked=0, Total=23562 [2022-07-14 06:08:27,324 INFO L87 Difference]: Start difference. First operand 170 states and 171 transitions. Second operand has 154 states, 153 states have (on average 3.2745098039215685) internal successors, (501), 154 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:31,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:31,761 INFO L93 Difference]: Finished difference Result 178 states and 179 transitions. [2022-07-14 06:08:31,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-14 06:08:31,761 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 153 states have (on average 3.2745098039215685) internal successors, (501), 154 states have internal predecessors, (501), 0 states have call successors, (0), 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 169 [2022-07-14 06:08:31,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:31,762 INFO L225 Difference]: With dead ends: 178 [2022-07-14 06:08:31,762 INFO L226 Difference]: Without dead ends: 178 [2022-07-14 06:08:31,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6275 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=5334, Invalid=29448, Unknown=0, NotChecked=0, Total=34782 [2022-07-14 06:08:31,764 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 651 mSDsluCounter, 1937 mSDsCounter, 0 mSdLazyCounter, 5011 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 1987 SdHoareTripleChecker+Invalid, 5404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 5011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:31,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 1987 Invalid, 5404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 5011 Invalid, 0 Unknown, 70 Unchecked, 2.1s Time] [2022-07-14 06:08:31,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-14 06:08:31,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 176. [2022-07-14 06:08:31,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0114285714285713) internal successors, (177), 175 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:31,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2022-07-14 06:08:31,767 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 169 [2022-07-14 06:08:31,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:31,767 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2022-07-14 06:08:31,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 153 states have (on average 3.2745098039215685) internal successors, (501), 154 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:31,768 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2022-07-14 06:08:31,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-07-14 06:08:31,768 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:31,769 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:31,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-07-14 06:08:31,987 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,SelfDestructingSolverStorable43 [2022-07-14 06:08:31,987 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:08:31,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:31,988 INFO L85 PathProgramCache]: Analyzing trace with hash 642418344, now seen corresponding path program 35 times [2022-07-14 06:08:31,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:08:31,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027126437] [2022-07-14 06:08:31,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:31,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:08:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1960 backedges. 855 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:33,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:08:33,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027126437] [2022-07-14 06:08:33,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027126437] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:08:33,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996074954] [2022-07-14 06:08:33,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:08:33,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:08:33,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:08:33,014 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:08:33,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-14 06:08:33,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-07-14 06:08:33,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:08:33,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 113 conjunts are in the unsatisfiable core [2022-07-14 06:08:33,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:33,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:08:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1960 backedges. 925 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:36,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:08:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1960 backedges. 925 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:38,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996074954] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:08:38,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:08:38,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 128 [2022-07-14 06:08:38,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110074149] [2022-07-14 06:08:38,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:08:38,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-07-14 06:08:38,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:08:38,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-07-14 06:08:38,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2707, Invalid=13549, Unknown=0, NotChecked=0, Total=16256 [2022-07-14 06:08:38,039 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand has 128 states, 128 states have (on average 3.4609375) internal successors, (443), 128 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:40,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:40,292 INFO L93 Difference]: Finished difference Result 258 states and 259 transitions. [2022-07-14 06:08:40,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-14 06:08:40,292 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 3.4609375) internal successors, (443), 128 states have internal predecessors, (443), 0 states have call successors, (0), 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 175 [2022-07-14 06:08:40,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:40,293 INFO L225 Difference]: With dead ends: 258 [2022-07-14 06:08:40,293 INFO L226 Difference]: Without dead ends: 183 [2022-07-14 06:08:40,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 273 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8300 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=5641, Invalid=25511, Unknown=0, NotChecked=0, Total=31152 [2022-07-14 06:08:40,295 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 174 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:40,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 453 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:08:40,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-07-14 06:08:40,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2022-07-14 06:08:40,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.011173184357542) internal successors, (181), 179 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:40,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2022-07-14 06:08:40,298 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 175 [2022-07-14 06:08:40,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:40,298 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2022-07-14 06:08:40,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 3.4609375) internal successors, (443), 128 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:40,299 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2022-07-14 06:08:40,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-14 06:08:40,299 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:40,299 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:40,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-14 06:08:40,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:08:40,523 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:08:40,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:40,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1138905915, now seen corresponding path program 36 times [2022-07-14 06:08:40,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:08:40,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247916312] [2022-07-14 06:08:40,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:40,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:08:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:42,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2053 backedges. 49 proven. 2004 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:42,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:08:42,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247916312] [2022-07-14 06:08:42,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247916312] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:08:42,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875727051] [2022-07-14 06:08:42,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:08:42,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:08:42,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:08:42,028 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:08:42,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-14 06:08:45,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2022-07-14 06:08:45,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:08:45,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 168 conjunts are in the unsatisfiable core [2022-07-14 06:08:45,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:47,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:08:47,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:08:47,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2053 backedges. 49 proven. 2004 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:47,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:08:47,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:08:47,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:08:48,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2053 backedges. 49 proven. 2004 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:48,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875727051] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:08:48,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:08:48,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 89 [2022-07-14 06:08:48,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028135996] [2022-07-14 06:08:48,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:08:48,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-07-14 06:08:48,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:08:48,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-07-14 06:08:48,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=7608, Unknown=0, NotChecked=0, Total=7832 [2022-07-14 06:08:48,455 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand has 89 states, 89 states have (on average 3.2808988764044944) internal successors, (292), 89 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:54,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:54,712 INFO L93 Difference]: Finished difference Result 263 states and 264 transitions. [2022-07-14 06:08:54,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-07-14 06:08:54,713 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.2808988764044944) internal successors, (292), 89 states have internal predecessors, (292), 0 states have call successors, (0), 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 179 [2022-07-14 06:08:54,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:54,713 INFO L225 Difference]: With dead ends: 263 [2022-07-14 06:08:54,713 INFO L226 Difference]: Without dead ends: 187 [2022-07-14 06:08:54,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 313 SyntacticMatches, 12 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2416 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=637, Invalid=19103, Unknown=0, NotChecked=0, Total=19740 [2022-07-14 06:08:54,715 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 217 mSDsluCounter, 3515 mSDsCounter, 0 mSdLazyCounter, 8595 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 3568 SdHoareTripleChecker+Invalid, 8936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 8595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:54,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 3568 Invalid, 8936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 8595 Invalid, 0 Unknown, 243 Unchecked, 3.4s Time] [2022-07-14 06:08:54,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-07-14 06:08:54,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2022-07-14 06:08:54,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.010928961748634) internal successors, (185), 183 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) [2022-07-14 06:08:54,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2022-07-14 06:08:54,717 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 179 [2022-07-14 06:08:54,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:54,717 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2022-07-14 06:08:54,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.2808988764044944) internal successors, (292), 89 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:54,718 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2022-07-14 06:08:54,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-14 06:08:54,718 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:54,718 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:54,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-14 06:08:54,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-14 06:08:54,927 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:08:54,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:54,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1233550434, now seen corresponding path program 37 times [2022-07-14 06:08:54,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:08:54,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447236369] [2022-07-14 06:08:54,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:54,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:08:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 1035 proven. 1115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:56,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:08:56,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447236369] [2022-07-14 06:08:56,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447236369] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:08:56,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155674173] [2022-07-14 06:08:56,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:08:56,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:08:56,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:08:56,428 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:08:56,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-14 06:08:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:56,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 140 conjunts are in the unsatisfiable core [2022-07-14 06:08:56,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:58,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 1128 proven. 1022 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:58,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:00,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:09:00,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 1128 proven. 1022 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:00,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155674173] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:00,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:00,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 55, 55] total 110 [2022-07-14 06:09:00,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953169574] [2022-07-14 06:09:00,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:00,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-07-14 06:09:00,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:00,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-07-14 06:09:00,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1184, Invalid=11026, Unknown=0, NotChecked=0, Total=12210 [2022-07-14 06:09:00,662 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand has 111 states, 110 states have (on average 3.3454545454545452) internal successors, (368), 111 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:05,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:05,280 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2022-07-14 06:09:05,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-14 06:09:05,281 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 110 states have (on average 3.3454545454545452) internal successors, (368), 111 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2022-07-14 06:09:05,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:05,282 INFO L225 Difference]: With dead ends: 189 [2022-07-14 06:09:05,282 INFO L226 Difference]: Without dead ends: 189 [2022-07-14 06:09:05,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 306 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4260 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=4778, Invalid=21628, Unknown=0, NotChecked=0, Total=26406 [2022-07-14 06:09:05,283 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 639 mSDsluCounter, 1792 mSDsCounter, 0 mSdLazyCounter, 4656 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 1847 SdHoareTripleChecker+Invalid, 4950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 4656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:05,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 1847 Invalid, 4950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 4656 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-14 06:09:05,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-07-14 06:09:05,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2022-07-14 06:09:05,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.010752688172043) internal successors, (188), 186 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) [2022-07-14 06:09:05,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2022-07-14 06:09:05,286 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 183 [2022-07-14 06:09:05,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:05,286 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2022-07-14 06:09:05,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 110 states have (on average 3.3454545454545452) internal successors, (368), 111 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:05,287 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2022-07-14 06:09:05,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-07-14 06:09:05,288 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:05,288 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:05,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:05,507 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,SelfDestructingSolverStorable46 [2022-07-14 06:09:05,507 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:09:05,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:05,508 INFO L85 PathProgramCache]: Analyzing trace with hash 960775906, now seen corresponding path program 38 times [2022-07-14 06:09:05,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:05,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299538482] [2022-07-14 06:09:05,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:05,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:07,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2226 backedges. 51 proven. 2175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:07,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:07,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299538482] [2022-07-14 06:09:07,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299538482] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:07,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297222387] [2022-07-14 06:09:07,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:09:07,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:07,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:07,338 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:09:07,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-14 06:09:07,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:09:07,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:07,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 151 conjunts are in the unsatisfiable core [2022-07-14 06:09:07,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:09,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:09:12,725 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:12,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-14 06:09:13,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2226 backedges. 1128 proven. 1098 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:13,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:17,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:09:17,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:09:17,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-07-14 06:09:17,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2226 backedges. 1128 proven. 1098 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:17,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297222387] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:17,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:17,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 146 [2022-07-14 06:09:17,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233977597] [2022-07-14 06:09:17,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:17,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-07-14 06:09:17,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:17,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-07-14 06:09:17,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1389, Invalid=19781, Unknown=0, NotChecked=0, Total=21170 [2022-07-14 06:09:17,442 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand has 146 states, 146 states have (on average 3.0821917808219177) internal successors, (450), 146 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:25,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:25,421 INFO L93 Difference]: Finished difference Result 278 states and 279 transitions. [2022-07-14 06:09:25,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-07-14 06:09:25,421 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 3.0821917808219177) internal successors, (450), 146 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2022-07-14 06:09:25,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:25,422 INFO L225 Difference]: With dead ends: 278 [2022-07-14 06:09:25,422 INFO L226 Difference]: Without dead ends: 199 [2022-07-14 06:09:25,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 331 SyntacticMatches, 3 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5526 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=2119, Invalid=29743, Unknown=0, NotChecked=0, Total=31862 [2022-07-14 06:09:25,424 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 176 mSDsluCounter, 3329 mSDsCounter, 0 mSdLazyCounter, 5354 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 3385 SdHoareTripleChecker+Invalid, 5694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 5354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:25,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 3385 Invalid, 5694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 5354 Invalid, 0 Unknown, 310 Unchecked, 2.4s Time] [2022-07-14 06:09:25,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-14 06:09:25,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 194. [2022-07-14 06:09:25,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.0103626943005182) internal successors, (195), 193 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:25,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2022-07-14 06:09:25,430 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 186 [2022-07-14 06:09:25,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:25,430 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2022-07-14 06:09:25,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 3.0821917808219177) internal successors, (450), 146 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:25,431 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2022-07-14 06:09:25,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-07-14 06:09:25,432 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:25,432 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:25,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:25,635 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,SelfDestructingSolverStorable47 [2022-07-14 06:09:25,636 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:09:25,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:25,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1487412159, now seen corresponding path program 39 times [2022-07-14 06:09:25,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:25,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449149601] [2022-07-14 06:09:25,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:25,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:25,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:27,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2406 backedges. 53 proven. 2353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:27,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:27,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449149601] [2022-07-14 06:09:27,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449149601] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:27,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279797677] [2022-07-14 06:09:27,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:09:27,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:27,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:27,490 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:09:27,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-14 06:09:29,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-07-14 06:09:29,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:29,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 180 conjunts are in the unsatisfiable core [2022-07-14 06:09:29,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:31,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:09:31,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:09:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2406 backedges. 53 proven. 2353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:31,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:31,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:09:31,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22