./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-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 64bit --witnessprinter.graph.data.programhash 1bedc761cea545b8144ad4138a379d7139cc98703c76e9b536a2e7389d5b6a10 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:03:05,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:03:05,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:03:05,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:03:05,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:03:05,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:03:05,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:03:05,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:03:05,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:03:05,596 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:03:05,607 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:03:05,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:03:05,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:03:05,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:03:05,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:03:05,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:03:05,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:03:05,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:03:05,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:03:05,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:03:05,626 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:03:05,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:03:05,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:03:05,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:03:05,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:03:05,639 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:03:05,640 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:03:05,640 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:03:05,641 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:03:05,641 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:03:05,642 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:03:05,642 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:03:05,644 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:03:05,645 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:03:05,646 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:03:05,647 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:03:05,647 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:03:05,648 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:03:05,648 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:03:05,648 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:03:05,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:03:05,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:03:05,658 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2022-07-21 17:03:05,695 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:03:05,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:03:05,696 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:03:05,697 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:03:05,697 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:03:05,697 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:03:05,698 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:03:05,698 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:03:05,699 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:03:05,699 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:03:05,700 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:03:05,700 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:03:05,700 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:03:05,700 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:03:05,700 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:03:05,701 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:03:05,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:03:05,701 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:03:05,701 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:03:05,702 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:03:05,702 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:03:05,702 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:03:05,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:03:05,703 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:03:05,703 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:03:05,703 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 17:03:05,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 17:03:05,703 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bedc761cea545b8144ad4138a379d7139cc98703c76e9b536a2e7389d5b6a10 [2022-07-21 17:03:06,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:03:06,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:03:06,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:03:06,048 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:03:06,049 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:03:06,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c [2022-07-21 17:03:06,104 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12a3cfc41/ad27a60f95964a4a9660fb5c9f56dd5a/FLAG343ac02a8 [2022-07-21 17:03:06,514 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:03:06,514 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c [2022-07-21 17:03:06,519 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12a3cfc41/ad27a60f95964a4a9660fb5c9f56dd5a/FLAG343ac02a8 [2022-07-21 17:03:06,532 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12a3cfc41/ad27a60f95964a4a9660fb5c9f56dd5a [2022-07-21 17:03:06,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:03:06,536 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:03:06,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:03:06,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:03:06,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:03:06,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:03:06" (1/1) ... [2022-07-21 17:03:06,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63c5b9ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:06, skipping insertion in model container [2022-07-21 17:03:06,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:03:06" (1/1) ... [2022-07-21 17:03:06,555 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:03:06,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:03:06,677 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:03:06,683 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:03:06,694 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:03:06,714 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:03:06,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:06 WrapperNode [2022-07-21 17:03:06,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:03:06,716 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:03:06,716 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:03:06,716 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:03:06,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:06" (1/1) ... [2022-07-21 17:03:06,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:06" (1/1) ... [2022-07-21 17:03:06,757 INFO L137 Inliner]: procedures = 10, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2022-07-21 17:03:06,759 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:03:06,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:03:06,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:03:06,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:03:06,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:06" (1/1) ... [2022-07-21 17:03:06,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:06" (1/1) ... [2022-07-21 17:03:06,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:06" (1/1) ... [2022-07-21 17:03:06,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:06" (1/1) ... [2022-07-21 17:03:06,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:06" (1/1) ... [2022-07-21 17:03:06,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:06" (1/1) ... [2022-07-21 17:03:06,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:06" (1/1) ... [2022-07-21 17:03:06,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:03:06,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:03:06,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:03:06,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:03:06,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:06" (1/1) ... [2022-07-21 17:03:06,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:03:06,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:06,833 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 17:03:06,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 17:03:06,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 17:03:06,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 17:03:06,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:03:06,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:03:06,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 17:03:06,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 17:03:06,943 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:03:06,946 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:03:07,148 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:03:07,153 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:03:07,154 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 17:03:07,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:03:07 BoogieIcfgContainer [2022-07-21 17:03:07,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:03:07,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:03:07,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:03:07,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:03:07,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:03:06" (1/3) ... [2022-07-21 17:03:07,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f86839d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:03:07, skipping insertion in model container [2022-07-21 17:03:07,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:06" (2/3) ... [2022-07-21 17:03:07,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f86839d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:03:07, skipping insertion in model container [2022-07-21 17:03:07,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:03:07" (3/3) ... [2022-07-21 17:03:07,187 INFO L111 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-2.c [2022-07-21 17:03:07,220 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:03:07,220 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-07-21 17:03:07,284 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:03:07,291 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@6a415e91, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3047e0aa [2022-07-21 17:03:07,291 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-07-21 17:03:07,296 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:07,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-21 17:03:07,308 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:07,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-21 17:03:07,309 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:07,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:07,317 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-07-21 17:03:07,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:07,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348006421] [2022-07-21 17:03:07,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:07,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:07,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:07,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348006421] [2022-07-21 17:03:07,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348006421] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:03:07,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:03:07,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:03:07,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230179379] [2022-07-21 17:03:07,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:03:07,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:03:07,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:07,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:03:07,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:03:07,545 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:07,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:07,633 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2022-07-21 17:03:07,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:03:07,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-07-21 17:03:07,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:07,645 INFO L225 Difference]: With dead ends: 47 [2022-07-21 17:03:07,646 INFO L226 Difference]: Without dead ends: 45 [2022-07-21 17:03:07,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:03:07,652 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 23 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:07,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 51 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:03:07,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-21 17:03:07,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2022-07-21 17:03:07,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:07,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-07-21 17:03:07,688 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 4 [2022-07-21 17:03:07,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:07,689 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-07-21 17:03:07,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:07,690 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-07-21 17:03:07,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-21 17:03:07,690 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:07,690 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-21 17:03:07,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 17:03:07,691 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:07,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:07,692 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-07-21 17:03:07,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:07,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341229810] [2022-07-21 17:03:07,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:07,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:07,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:07,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:07,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341229810] [2022-07-21 17:03:07,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341229810] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:03:07,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:03:07,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:03:07,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763405122] [2022-07-21 17:03:07,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:03:07,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:03:07,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:07,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:03:07,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:03:07,782 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:07,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:07,818 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-07-21 17:03:07,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:03:07,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-07-21 17:03:07,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:07,820 INFO L225 Difference]: With dead ends: 41 [2022-07-21 17:03:07,820 INFO L226 Difference]: Without dead ends: 41 [2022-07-21 17:03:07,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:03:07,826 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:07,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 48 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:03:07,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-21 17:03:07,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2022-07-21 17:03:07,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 38 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:07,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-07-21 17:03:07,837 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 4 [2022-07-21 17:03:07,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:07,838 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-07-21 17:03:07,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:07,838 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-07-21 17:03:07,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 17:03:07,839 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:07,839 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:07,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 17:03:07,840 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:07,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:07,848 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2022-07-21 17:03:07,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:07,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644830392] [2022-07-21 17:03:07,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:07,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:07,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:07,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644830392] [2022-07-21 17:03:07,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644830392] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:07,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716797675] [2022-07-21 17:03:07,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:07,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:07,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:07,997 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:03:08,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 17:03:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:08,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 17:03:08,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:08,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:03:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:08,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:08,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716797675] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:08,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:08,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-07-21 17:03:08,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701946309] [2022-07-21 17:03:08,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:08,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 17:03:08,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:08,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 17:03:08,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:03:08,300 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:08,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:08,404 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-07-21 17:03:08,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:03:08,405 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-21 17:03:08,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:08,406 INFO L225 Difference]: With dead ends: 49 [2022-07-21 17:03:08,406 INFO L226 Difference]: Without dead ends: 49 [2022-07-21 17:03:08,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:03:08,410 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:08,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 100 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:03:08,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-21 17:03:08,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-07-21 17:03:08,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.425) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:08,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-07-21 17:03:08,415 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 8 [2022-07-21 17:03:08,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:08,416 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-07-21 17:03:08,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:08,416 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-07-21 17:03:08,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 17:03:08,417 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:08,417 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:08,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:08,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:08,642 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:08,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:08,642 INFO L85 PathProgramCache]: Analyzing trace with hash 868179552, now seen corresponding path program 1 times [2022-07-21 17:03:08,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:08,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793584866] [2022-07-21 17:03:08,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:08,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 17:03:08,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:08,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793584866] [2022-07-21 17:03:08,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793584866] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:08,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481350705] [2022-07-21 17:03:08,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:08,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:08,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:08,727 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:03:08,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 17:03:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:08,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:03:08,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:08,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:08,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481350705] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:08,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:08,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 16 [2022-07-21 17:03:08,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878760191] [2022-07-21 17:03:08,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:08,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 17:03:08,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:08,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 17:03:08,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-07-21 17:03:08,910 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:09,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:09,124 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2022-07-21 17:03:09,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 17:03:09,125 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-21 17:03:09,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:09,125 INFO L225 Difference]: With dead ends: 70 [2022-07-21 17:03:09,126 INFO L226 Difference]: Without dead ends: 70 [2022-07-21 17:03:09,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2022-07-21 17:03:09,127 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 151 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:09,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 73 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:03:09,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-21 17:03:09,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2022-07-21 17:03:09,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 63 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:09,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2022-07-21 17:03:09,132 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 23 [2022-07-21 17:03:09,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:09,133 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2022-07-21 17:03:09,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:09,133 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2022-07-21 17:03:09,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 17:03:09,134 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:09,134 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:09,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:09,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-21 17:03:09,348 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:09,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:09,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1707912335, now seen corresponding path program 1 times [2022-07-21 17:03:09,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:09,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959311784] [2022-07-21 17:03:09,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:09,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:09,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:09,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959311784] [2022-07-21 17:03:09,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959311784] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:09,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107684259] [2022-07-21 17:03:09,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:09,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:09,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:09,532 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:03:09,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 17:03:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:09,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 17:03:09,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:09,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:09,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107684259] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:09,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:09,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-21 17:03:09,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238930993] [2022-07-21 17:03:09,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:09,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 17:03:09,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:09,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 17:03:09,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-21 17:03:09,939 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 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) [2022-07-21 17:03:10,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:10,032 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2022-07-21 17:03:10,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 17:03:10,033 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 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 47 [2022-07-21 17:03:10,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:10,041 INFO L225 Difference]: With dead ends: 112 [2022-07-21 17:03:10,041 INFO L226 Difference]: Without dead ends: 112 [2022-07-21 17:03:10,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-21 17:03:10,043 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 66 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:10,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 145 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:03:10,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-21 17:03:10,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-07-21 17:03:10,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.0849056603773586) internal successors, (115), 111 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) [2022-07-21 17:03:10,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2022-07-21 17:03:10,051 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 47 [2022-07-21 17:03:10,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:10,051 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2022-07-21 17:03:10,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 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) [2022-07-21 17:03:10,052 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2022-07-21 17:03:10,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-21 17:03:10,054 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:10,054 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:10,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:10,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:10,278 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:10,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:10,279 INFO L85 PathProgramCache]: Analyzing trace with hash -726611221, now seen corresponding path program 2 times [2022-07-21 17:03:10,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:10,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185380048] [2022-07-21 17:03:10,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:10,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:10,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:10,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:10,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185380048] [2022-07-21 17:03:10,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185380048] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:10,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106004309] [2022-07-21 17:03:10,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:03:10,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:10,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:10,689 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:03:10,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 17:03:10,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 17:03:10,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:03:10,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 17:03:10,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:10,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:03:11,126 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-07-21 17:03:11,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:03:11,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106004309] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:03:11,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:03:11,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [25] total 27 [2022-07-21 17:03:11,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693819502] [2022-07-21 17:03:11,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:03:11,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:03:11,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:11,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:03:11,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2022-07-21 17:03:11,131 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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) [2022-07-21 17:03:11,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:11,187 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2022-07-21 17:03:11,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:03:11,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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 95 [2022-07-21 17:03:11,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:11,189 INFO L225 Difference]: With dead ends: 127 [2022-07-21 17:03:11,189 INFO L226 Difference]: Without dead ends: 127 [2022-07-21 17:03:11,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2022-07-21 17:03:11,191 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 58 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:11,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 26 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:03:11,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-21 17:03:11,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2022-07-21 17:03:11,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0948275862068966) internal successors, (127), 120 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:11,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 127 transitions. [2022-07-21 17:03:11,198 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 127 transitions. Word has length 95 [2022-07-21 17:03:11,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:11,199 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 127 transitions. [2022-07-21 17:03:11,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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) [2022-07-21 17:03:11,199 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 127 transitions. [2022-07-21 17:03:11,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-21 17:03:11,201 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:11,201 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:11,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-21 17:03:11,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:11,411 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:11,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:11,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1806473229, now seen corresponding path program 1 times [2022-07-21 17:03:11,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:11,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344065593] [2022-07-21 17:03:11,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:11,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-07-21 17:03:11,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:11,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344065593] [2022-07-21 17:03:11,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344065593] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:03:11,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:03:11,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:03:11,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839571245] [2022-07-21 17:03:11,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:03:11,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:03:11,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:11,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:03:11,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:03:11,512 INFO L87 Difference]: Start difference. First operand 121 states and 127 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:11,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:11,518 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2022-07-21 17:03:11,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:03:11,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2022-07-21 17:03:11,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:11,519 INFO L225 Difference]: With dead ends: 120 [2022-07-21 17:03:11,519 INFO L226 Difference]: Without dead ends: 120 [2022-07-21 17:03:11,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:03:11,520 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:11,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:03:11,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-21 17:03:11,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-07-21 17:03:11,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 116 states have (on average 1.0862068965517242) internal successors, (126), 119 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:11,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 126 transitions. [2022-07-21 17:03:11,527 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 126 transitions. Word has length 97 [2022-07-21 17:03:11,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:11,528 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 126 transitions. [2022-07-21 17:03:11,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:11,528 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 126 transitions. [2022-07-21 17:03:11,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-21 17:03:11,529 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:11,530 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:11,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 17:03:11,530 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:11,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:11,531 INFO L85 PathProgramCache]: Analyzing trace with hash 853988464, now seen corresponding path program 1 times [2022-07-21 17:03:11,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:11,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489882214] [2022-07-21 17:03:11,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:11,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-07-21 17:03:11,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:11,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489882214] [2022-07-21 17:03:11,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489882214] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:03:11,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:03:11,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:03:11,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684372844] [2022-07-21 17:03:11,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:03:11,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:03:11,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:11,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:03:11,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:03:11,662 INFO L87 Difference]: Start difference. First operand 120 states and 126 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:11,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:11,705 INFO L93 Difference]: Finished difference Result 125 states and 129 transitions. [2022-07-21 17:03:11,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:03:11,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-07-21 17:03:11,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:11,707 INFO L225 Difference]: With dead ends: 125 [2022-07-21 17:03:11,707 INFO L226 Difference]: Without dead ends: 125 [2022-07-21 17:03:11,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:03:11,708 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:11,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 39 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:03:11,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-21 17:03:11,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 120. [2022-07-21 17:03:11,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 116 states have (on average 1.0775862068965518) internal successors, (125), 119 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) [2022-07-21 17:03:11,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2022-07-21 17:03:11,714 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 99 [2022-07-21 17:03:11,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:11,715 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2022-07-21 17:03:11,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:11,715 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2022-07-21 17:03:11,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-21 17:03:11,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:11,716 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:11,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 17:03:11,717 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:11,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:11,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1714714637, now seen corresponding path program 1 times [2022-07-21 17:03:11,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:11,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201543676] [2022-07-21 17:03:11,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:11,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:12,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:12,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201543676] [2022-07-21 17:03:12,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201543676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:12,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887735044] [2022-07-21 17:03:12,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:12,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:12,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:12,056 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:03:12,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 17:03:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:12,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 17:03:12,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:12,311 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:12,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:13,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887735044] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:13,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:13,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-07-21 17:03:13,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330507974] [2022-07-21 17:03:13,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:13,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-21 17:03:13,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:13,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-21 17:03:13,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-21 17:03:13,073 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand has 49 states, 49 states have (on average 4.0) internal successors, (196), 49 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:13,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:13,273 INFO L93 Difference]: Finished difference Result 216 states and 221 transitions. [2022-07-21 17:03:13,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-21 17:03:13,274 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.0) internal successors, (196), 49 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-07-21 17:03:13,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:13,276 INFO L225 Difference]: With dead ends: 216 [2022-07-21 17:03:13,276 INFO L226 Difference]: Without dead ends: 216 [2022-07-21 17:03:13,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-21 17:03:13,280 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 138 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:13,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 202 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:03:13,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-21 17:03:13,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2022-07-21 17:03:13,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 212 states have (on average 1.0424528301886793) internal successors, (221), 215 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 221 transitions. [2022-07-21 17:03:13,297 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 221 transitions. Word has length 101 [2022-07-21 17:03:13,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:13,298 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 221 transitions. [2022-07-21 17:03:13,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.0) internal successors, (196), 49 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:13,298 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 221 transitions. [2022-07-21 17:03:13,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-07-21 17:03:13,305 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:13,305 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:13,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:13,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:13,532 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:13,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:13,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1874420395, now seen corresponding path program 2 times [2022-07-21 17:03:13,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:13,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141396477] [2022-07-21 17:03:13,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:13,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:14,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:14,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141396477] [2022-07-21 17:03:14,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141396477] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:14,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130981084] [2022-07-21 17:03:14,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:03:14,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:14,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:14,452 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:03:14,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 17:03:14,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 17:03:14,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:03:14,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 17:03:14,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2022-07-21 17:03:15,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:03:15,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130981084] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:03:15,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:03:15,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [49] total 51 [2022-07-21 17:03:15,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22481395] [2022-07-21 17:03:15,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:03:15,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:03:15,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:15,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:03:15,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2022-07-21 17:03:15,199 INFO L87 Difference]: Start difference. First operand 216 states and 221 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:15,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:15,201 INFO L93 Difference]: Finished difference Result 236 states and 245 transitions. [2022-07-21 17:03:15,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:03:15,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2022-07-21 17:03:15,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:15,202 INFO L225 Difference]: With dead ends: 236 [2022-07-21 17:03:15,203 INFO L226 Difference]: Without dead ends: 232 [2022-07-21 17:03:15,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2022-07-21 17:03:15,204 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:15,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 51 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2022-07-21 17:03:15,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-07-21 17:03:15,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 228. [2022-07-21 17:03:15,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 224 states have (on average 1.0580357142857142) internal successors, (237), 227 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:15,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 237 transitions. [2022-07-21 17:03:15,209 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 237 transitions. Word has length 197 [2022-07-21 17:03:15,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:15,209 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 237 transitions. [2022-07-21 17:03:15,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:15,209 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 237 transitions. [2022-07-21 17:03:15,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-07-21 17:03:15,211 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:15,211 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:15,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:15,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:15,427 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:15,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:15,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1875755066, now seen corresponding path program 1 times [2022-07-21 17:03:15,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:15,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206521395] [2022-07-21 17:03:15,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:15,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4189 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:03:16,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:16,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206521395] [2022-07-21 17:03:16,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206521395] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:16,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544065125] [2022-07-21 17:03:16,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:16,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:16,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:16,443 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:03:16,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 17:03:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:16,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-21 17:03:16,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4189 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:03:16,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4189 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:03:19,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544065125] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:19,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:19,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-07-21 17:03:19,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135967370] [2022-07-21 17:03:19,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:19,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-07-21 17:03:19,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:19,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-07-21 17:03:19,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-07-21 17:03:19,344 INFO L87 Difference]: Start difference. First operand 228 states and 237 transitions. Second operand has 97 states, 97 states have (on average 3.979381443298969) internal successors, (386), 97 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:19,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:19,831 INFO L93 Difference]: Finished difference Result 420 states and 429 transitions. [2022-07-21 17:03:19,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-21 17:03:19,832 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.979381443298969) internal successors, (386), 97 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2022-07-21 17:03:19,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:19,834 INFO L225 Difference]: With dead ends: 420 [2022-07-21 17:03:19,834 INFO L226 Difference]: Without dead ends: 420 [2022-07-21 17:03:19,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-07-21 17:03:19,836 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 282 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:19,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 184 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:03:19,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-07-21 17:03:19,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 420. [2022-07-21 17:03:19,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 416 states have (on average 1.03125) internal successors, (429), 419 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:19,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 429 transitions. [2022-07-21 17:03:19,843 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 429 transitions. Word has length 197 [2022-07-21 17:03:19,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:19,843 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 429 transitions. [2022-07-21 17:03:19,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.979381443298969) internal successors, (386), 97 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:19,844 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 429 transitions. [2022-07-21 17:03:19,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-07-21 17:03:19,848 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:19,848 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:19,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:20,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:20,067 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:20,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:20,067 INFO L85 PathProgramCache]: Analyzing trace with hash -385247830, now seen corresponding path program 2 times [2022-07-21 17:03:20,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:20,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829817950] [2022-07-21 17:03:20,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:20,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 17581 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:03:23,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:23,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829817950] [2022-07-21 17:03:23,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829817950] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:23,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100018235] [2022-07-21 17:03:23,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:03:23,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:23,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:23,416 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:03:23,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 17:03:23,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:03:23,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:03:23,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 1369 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-21 17:03:23,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:24,175 INFO L134 CoverageAnalysis]: Checked inductivity of 17581 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:03:24,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:32,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17581 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:03:32,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100018235] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:32,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:32,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2022-07-21 17:03:32,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31161333] [2022-07-21 17:03:32,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:32,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-07-21 17:03:32,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:32,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-07-21 17:03:32,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-07-21 17:03:32,827 INFO L87 Difference]: Start difference. First operand 420 states and 429 transitions. Second operand has 193 states, 193 states have (on average 3.989637305699482) internal successors, (770), 193 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:33,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:33,941 INFO L93 Difference]: Finished difference Result 804 states and 813 transitions. [2022-07-21 17:03:33,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-07-21 17:03:33,943 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 3.989637305699482) internal successors, (770), 193 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 389 [2022-07-21 17:03:33,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:33,946 INFO L225 Difference]: With dead ends: 804 [2022-07-21 17:03:33,946 INFO L226 Difference]: Without dead ends: 804 [2022-07-21 17:03:33,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-07-21 17:03:33,949 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 570 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:33,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 280 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 17:03:33,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-07-21 17:03:33,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 804. [2022-07-21 17:03:33,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 800 states have (on average 1.01625) internal successors, (813), 803 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:33,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 813 transitions. [2022-07-21 17:03:33,961 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 813 transitions. Word has length 389 [2022-07-21 17:03:33,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:33,962 INFO L495 AbstractCegarLoop]: Abstraction has 804 states and 813 transitions. [2022-07-21 17:03:33,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 3.989637305699482) internal successors, (770), 193 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:33,963 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 813 transitions. [2022-07-21 17:03:33,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2022-07-21 17:03:33,977 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:33,977 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 190, 190, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:34,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:34,191 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,SelfDestructingSolverStorable11 [2022-07-21 17:03:34,192 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:34,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:34,193 INFO L85 PathProgramCache]: Analyzing trace with hash 587317386, now seen corresponding path program 3 times [2022-07-21 17:03:34,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:34,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742730838] [2022-07-21 17:03:34,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:34,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:46,123 INFO L134 CoverageAnalysis]: Checked inductivity of 72013 backedges. 0 proven. 72010 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:03:46,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:46,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742730838] [2022-07-21 17:03:46,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742730838] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:46,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508140025] [2022-07-21 17:03:46,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:03:46,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:46,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:46,125 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:03:46,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 17:03:46,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 17:03:46,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:03:46,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 17:03:46,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:46,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:03:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 72013 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 72010 trivial. 0 not checked. [2022-07-21 17:03:48,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:51,507 INFO L134 CoverageAnalysis]: Checked inductivity of 72013 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 72010 trivial. 0 not checked. [2022-07-21 17:03:51,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508140025] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:51,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:51,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 7, 7] total 205 [2022-07-21 17:03:51,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798672967] [2022-07-21 17:03:51,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:51,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 205 states [2022-07-21 17:03:51,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:51,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 205 interpolants. [2022-07-21 17:03:51,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18572, Invalid=23248, Unknown=0, NotChecked=0, Total=41820 [2022-07-21 17:03:51,516 INFO L87 Difference]: Start difference. First operand 804 states and 813 transitions. Second operand has 205 states, 205 states have (on average 3.9170731707317072) internal successors, (803), 205 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:09,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:09,807 INFO L93 Difference]: Finished difference Result 849 states and 864 transitions. [2022-07-21 17:04:09,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2022-07-21 17:04:09,807 INFO L78 Accepts]: Start accepts. Automaton has has 205 states, 205 states have (on average 3.9170731707317072) internal successors, (803), 205 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 773 [2022-07-21 17:04:09,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:09,812 INFO L225 Difference]: With dead ends: 849 [2022-07-21 17:04:09,812 INFO L226 Difference]: Without dead ends: 849 [2022-07-21 17:04:09,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1933 GetRequests, 1534 SyntacticMatches, 0 SemanticMatches, 399 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21435 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=56818, Invalid=103582, Unknown=0, NotChecked=0, Total=160400 [2022-07-21 17:04:09,822 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 2961 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 781 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2961 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 781 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:09,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2961 Valid, 346 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [781 Valid, 782 Invalid, 0 Unknown, 53 Unchecked, 0.9s Time] [2022-07-21 17:04:09,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-07-21 17:04:09,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 833. [2022-07-21 17:04:09,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 829 states have (on average 1.028950542822678) internal successors, (853), 832 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:09,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 853 transitions. [2022-07-21 17:04:09,835 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 853 transitions. Word has length 773 [2022-07-21 17:04:09,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:09,836 INFO L495 AbstractCegarLoop]: Abstraction has 833 states and 853 transitions. [2022-07-21 17:04:09,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 205 states, 205 states have (on average 3.9170731707317072) internal successors, (803), 205 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:09,837 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 853 transitions. [2022-07-21 17:04:09,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2022-07-21 17:04:09,853 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:09,854 INFO L195 NwaCegarLoop]: trace histogram [191, 191, 191, 191, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:04:09,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-21 17:04:10,067 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,SelfDestructingSolverStorable12 [2022-07-21 17:04:10,067 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:04:10,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:10,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1343914931, now seen corresponding path program 1 times [2022-07-21 17:04:10,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:04:10,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351129893] [2022-07-21 17:04:10,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:10,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:04:10,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 72775 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 72773 trivial. 0 not checked. [2022-07-21 17:04:10,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:04:10,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351129893] [2022-07-21 17:04:10,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351129893] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:04:10,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:04:10,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:04:10,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81362247] [2022-07-21 17:04:10,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:04:10,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:04:10,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:04:10,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:04:10,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:04:10,476 INFO L87 Difference]: Start difference. First operand 833 states and 853 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:10,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:10,484 INFO L93 Difference]: Finished difference Result 835 states and 854 transitions. [2022-07-21 17:04:10,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:04:10,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 779 [2022-07-21 17:04:10,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:10,488 INFO L225 Difference]: With dead ends: 835 [2022-07-21 17:04:10,488 INFO L226 Difference]: Without dead ends: 834 [2022-07-21 17:04:10,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:04:10,489 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:10,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:04:10,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-07-21 17:04:10,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 834. [2022-07-21 17:04:10,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 830 states have (on average 1.0253012048192771) internal successors, (851), 833 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:10,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 851 transitions. [2022-07-21 17:04:10,500 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 851 transitions. Word has length 779 [2022-07-21 17:04:10,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:10,502 INFO L495 AbstractCegarLoop]: Abstraction has 834 states and 851 transitions. [2022-07-21 17:04:10,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:10,502 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 851 transitions. [2022-07-21 17:04:10,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 782 [2022-07-21 17:04:10,508 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:10,508 INFO L195 NwaCegarLoop]: trace histogram [191, 191, 191, 191, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:04:10,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 17:04:10,508 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:04:10,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:10,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1100580240, now seen corresponding path program 1 times [2022-07-21 17:04:10,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:04:10,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089572685] [2022-07-21 17:04:10,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:10,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:04:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 72777 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 72774 trivial. 0 not checked. [2022-07-21 17:04:10,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:04:10,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089572685] [2022-07-21 17:04:10,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089572685] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:04:10,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:04:10,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:04:10,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716435215] [2022-07-21 17:04:10,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:04:10,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:04:10,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:04:10,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:04:10,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:04:10,930 INFO L87 Difference]: Start difference. First operand 834 states and 851 transitions. Second operand has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:10,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:10,946 INFO L93 Difference]: Finished difference Result 841 states and 855 transitions. [2022-07-21 17:04:10,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:04:10,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 781 [2022-07-21 17:04:10,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:10,950 INFO L225 Difference]: With dead ends: 841 [2022-07-21 17:04:10,951 INFO L226 Difference]: Without dead ends: 841 [2022-07-21 17:04:10,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:04:10,953 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 17 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:10,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 31 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:04:10,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-07-21 17:04:10,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 829. [2022-07-21 17:04:10,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 827 states have (on average 1.0181378476420797) internal successors, (842), 828 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:10,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 842 transitions. [2022-07-21 17:04:10,965 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 842 transitions. Word has length 781 [2022-07-21 17:04:10,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:10,966 INFO L495 AbstractCegarLoop]: Abstraction has 829 states and 842 transitions. [2022-07-21 17:04:10,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:10,966 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 842 transitions. [2022-07-21 17:04:10,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 788 [2022-07-21 17:04:10,971 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:10,972 INFO L195 NwaCegarLoop]: trace histogram [191, 191, 191, 191, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:04:10,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 17:04:10,973 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:04:10,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:10,973 INFO L85 PathProgramCache]: Analyzing trace with hash 901457319, now seen corresponding path program 1 times [2022-07-21 17:04:10,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:04:10,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92604708] [2022-07-21 17:04:10,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:10,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:04:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:22,611 INFO L134 CoverageAnalysis]: Checked inductivity of 72776 backedges. 0 proven. 72771 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 17:04:22,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:04:22,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92604708] [2022-07-21 17:04:22,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92604708] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:04:22,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481318715] [2022-07-21 17:04:22,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:22,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:04:22,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:04:22,614 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:04:22,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 17:04:23,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:23,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 2758 conjuncts, 193 conjunts are in the unsatisfiable core [2022-07-21 17:04:23,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:04:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 72776 backedges. 0 proven. 72771 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 17:04:24,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:04:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 72776 backedges. 0 proven. 72771 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 17:04:57,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481318715] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:04:57,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:04:57,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 194, 194] total 387 [2022-07-21 17:04:57,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154960236] [2022-07-21 17:04:57,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:04:57,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 387 states [2022-07-21 17:04:57,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:04:57,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 387 interpolants. [2022-07-21 17:04:57,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74691, Invalid=74691, Unknown=0, NotChecked=0, Total=149382 [2022-07-21 17:04:57,825 INFO L87 Difference]: Start difference. First operand 829 states and 842 transitions. Second operand has 387 states, 387 states have (on average 4.015503875968992) internal successors, (1554), 387 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:05:02,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:05:02,620 INFO L93 Difference]: Finished difference Result 1601 states and 1614 transitions. [2022-07-21 17:05:02,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 386 states. [2022-07-21 17:05:02,621 INFO L78 Accepts]: Start accepts. Automaton has has 387 states, 387 states have (on average 4.015503875968992) internal successors, (1554), 387 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 787 [2022-07-21 17:05:02,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:05:02,627 INFO L225 Difference]: With dead ends: 1601 [2022-07-21 17:05:02,627 INFO L226 Difference]: Without dead ends: 1601 [2022-07-21 17:05:02,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1766 GetRequests, 1381 SyntacticMatches, 0 SemanticMatches, 385 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 43.7s TimeCoverageRelationStatistics Valid=74691, Invalid=74691, Unknown=0, NotChecked=0, Total=149382 [2022-07-21 17:05:02,635 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1728 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1728 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:05:02,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1728 Valid, 526 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-21 17:05:02,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2022-07-21 17:05:02,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1601. [2022-07-21 17:05:02,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1599 states have (on average 1.0093808630393997) internal successors, (1614), 1600 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:05:02,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 1614 transitions. [2022-07-21 17:05:02,654 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 1614 transitions. Word has length 787 [2022-07-21 17:05:02,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:05:02,655 INFO L495 AbstractCegarLoop]: Abstraction has 1601 states and 1614 transitions. [2022-07-21 17:05:02,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 387 states, 387 states have (on average 4.015503875968992) internal successors, (1554), 387 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:05:02,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 1614 transitions. [2022-07-21 17:05:02,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1560 [2022-07-21 17:05:02,672 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:05:02,672 INFO L195 NwaCegarLoop]: trace histogram [384, 384, 384, 384, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:05:02,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 17:05:02,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-21 17:05:02,895 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:05:02,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:05:02,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1517771908, now seen corresponding path program 2 times [2022-07-21 17:05:02,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:05:02,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784432556] [2022-07-21 17:05:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:05:02,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:05:04,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:05:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 294533 backedges. 0 proven. 294528 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 17:05:48,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:05:48,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784432556] [2022-07-21 17:05:48,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784432556] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:05:48,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064576580] [2022-07-21 17:05:48,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:05:48,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:05:48,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:05:48,071 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:05:48,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 17:05:48,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 17:05:48,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:05:48,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 17:05:48,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:05:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 294533 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 294533 trivial. 0 not checked. [2022-07-21 17:05:53,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:05:53,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064576580] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:05:53,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:05:53,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [387] total 389 [2022-07-21 17:05:53,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633207763] [2022-07-21 17:05:53,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:05:53,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:05:53,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:05:53,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:05:53,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74695, Invalid=76237, Unknown=0, NotChecked=0, Total=150932 [2022-07-21 17:05:53,085 INFO L87 Difference]: Start difference. First operand 1601 states and 1614 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:05:53,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:05:53,087 INFO L93 Difference]: Finished difference Result 1600 states and 1613 transitions. [2022-07-21 17:05:53,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:05:53,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1559 [2022-07-21 17:05:53,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:05:53,093 INFO L225 Difference]: With dead ends: 1600 [2022-07-21 17:05:53,093 INFO L226 Difference]: Without dead ends: 1595 [2022-07-21 17:05:53,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1945 GetRequests, 1558 SyntacticMatches, 0 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 42.8s TimeCoverageRelationStatistics Valid=74695, Invalid=76237, Unknown=0, NotChecked=0, Total=150932 [2022-07-21 17:05:53,100 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:05:53,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 32 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2022-07-21 17:05:53,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2022-07-21 17:05:53,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1574. [2022-07-21 17:05:53,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1573 states have (on average 1.003178639542276) internal successors, (1578), 1573 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:05:53,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 1578 transitions. [2022-07-21 17:05:53,121 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 1578 transitions. Word has length 1559 [2022-07-21 17:05:53,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:05:53,122 INFO L495 AbstractCegarLoop]: Abstraction has 1574 states and 1578 transitions. [2022-07-21 17:05:53,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:05:53,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 1578 transitions. [2022-07-21 17:05:53,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1562 [2022-07-21 17:05:53,137 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:05:53,138 INFO L195 NwaCegarLoop]: trace histogram [384, 384, 384, 384, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2022-07-21 17:05:53,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 17:05:53,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 17:05:53,361 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:05:53,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:05:53,361 INFO L85 PathProgramCache]: Analyzing trace with hash -869508622, now seen corresponding path program 4 times [2022-07-21 17:05:53,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:05:53,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517108083] [2022-07-21 17:05:53,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:05:53,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:05:54,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat