./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-three-array-min.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d 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 ../../../trunk/examples/svcomp/weaver/popl20-three-array-min.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3e185f9c0dac86cdbb29caae2de39811a090d813c08c4c3552062c2aa77b8788 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 07:29:56,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:29:56,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:29:56,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:29:56,515 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:29:56,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:29:56,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:29:56,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:29:56,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:29:56,519 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:29:56,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:29:56,520 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:29:56,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:29:56,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:29:56,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:29:56,523 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:29:56,523 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:29:56,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:29:56,525 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:29:56,527 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:29:56,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:29:56,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:29:56,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:29:56,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:29:56,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:29:56,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:29:56,556 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:29:56,556 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:29:56,557 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:29:56,557 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:29:56,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:29:56,558 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:29:56,559 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:29:56,560 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:29:56,560 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:29:56,561 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:29:56,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:29:56,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:29:56,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:29:56,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:29:56,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:29:56,564 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 07:29:56,584 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:29:56,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:29:56,585 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:29:56,585 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:29:56,586 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:29:56,586 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:29:56,587 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:29:56,587 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:29:56,587 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:29:56,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:29:56,588 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:29:56,588 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:29:56,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:29:56,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:29:56,589 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:29:56,589 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:29:56,589 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:29:56,589 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:29:56,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:29:56,589 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:29:56,589 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:29:56,589 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:29:56,590 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:29:56,590 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:29:56,590 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:29:56,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:29:56,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:29:56,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:29:56,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 07:29:56,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 07:29:56,591 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:29:56,591 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:29:56,591 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:29:56,591 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:29:56,591 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e185f9c0dac86cdbb29caae2de39811a090d813c08c4c3552062c2aa77b8788 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:29:56,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:29:56,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:29:56,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:29:56,887 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:29:56,887 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:29:56,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-three-array-min.wvr.c [2023-08-30 07:29:58,260 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:29:58,443 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:29:58,444 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-min.wvr.c [2023-08-30 07:29:58,449 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1484b3e42/cb3506d43e534f1abe35b2ab6a79ae33/FLAG8b91d1c7d [2023-08-30 07:29:58,461 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1484b3e42/cb3506d43e534f1abe35b2ab6a79ae33 [2023-08-30 07:29:58,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:29:58,464 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:29:58,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:29:58,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:29:58,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:29:58,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:29:58" (1/1) ... [2023-08-30 07:29:58,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f81c8a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:29:58, skipping insertion in model container [2023-08-30 07:29:58,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:29:58" (1/1) ... [2023-08-30 07:29:58,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:29:58,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:29:58,627 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-min.wvr.c[2815,2828] [2023-08-30 07:29:58,637 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:29:58,646 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 07:29:58,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1366aae0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:29:58, skipping insertion in model container [2023-08-30 07:29:58,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:29:58,649 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 07:29:58,650 INFO L158 Benchmark]: Toolchain (without parser) took 185.68ms. Allocated memory is still 67.1MB. Free memory was 43.9MB in the beginning and 33.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 07:29:58,651 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 67.1MB. Free memory was 44.5MB in the beginning and 44.4MB in the end (delta: 54.3kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 07:29:58,651 INFO L158 Benchmark]: CACSL2BoogieTranslator took 182.58ms. Allocated memory is still 67.1MB. Free memory was 43.7MB in the beginning and 33.9MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 07:29:58,652 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 67.1MB. Free memory was 44.5MB in the beginning and 44.4MB in the end (delta: 54.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 182.58ms. Allocated memory is still 67.1MB. Free memory was 43.7MB in the beginning and 33.9MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 123]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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 ../../../trunk/examples/svcomp/weaver/popl20-three-array-min.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3e185f9c0dac86cdbb29caae2de39811a090d813c08c4c3552062c2aa77b8788 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 07:30:00,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:30:00,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:30:00,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:30:00,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:30:00,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:30:00,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:30:00,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:30:00,211 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:30:00,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:30:00,215 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:30:00,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:30:00,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:30:00,218 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:30:00,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:30:00,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:30:00,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:30:00,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:30:00,231 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:30:00,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:30:00,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:30:00,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:30:00,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:30:00,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:30:00,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:30:00,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:30:00,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:30:00,240 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:30:00,241 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:30:00,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:30:00,243 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:30:00,245 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:30:00,246 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:30:00,247 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:30:00,248 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:30:00,248 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:30:00,249 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:30:00,249 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:30:00,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:30:00,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:30:00,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:30:00,251 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 07:30:00,277 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:30:00,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:30:00,278 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:30:00,278 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:30:00,279 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:30:00,279 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:30:00,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:30:00,280 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:30:00,280 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:30:00,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:30:00,281 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:30:00,281 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:30:00,281 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:30:00,281 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:30:00,281 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:30:00,281 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:30:00,281 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:30:00,282 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:30:00,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:30:00,282 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:30:00,282 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 07:30:00,282 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 07:30:00,282 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:30:00,282 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:30:00,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:30:00,283 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:30:00,283 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:30:00,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:30:00,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:30:00,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:30:00,283 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 07:30:00,283 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 07:30:00,284 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:30:00,284 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:30:00,284 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:30:00,284 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 07:30:00,284 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:30:00,284 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e185f9c0dac86cdbb29caae2de39811a090d813c08c4c3552062c2aa77b8788 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:30:00,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:30:00,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:30:00,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:30:00,554 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:30:00,554 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:30:00,556 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-three-array-min.wvr.c [2023-08-30 07:30:01,765 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:30:01,919 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:30:01,919 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-min.wvr.c [2023-08-30 07:30:01,926 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de99651c9/817bfb95ca9e4e509d58aaaf0fe76005/FLAGe11651398 [2023-08-30 07:30:01,936 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de99651c9/817bfb95ca9e4e509d58aaaf0fe76005 [2023-08-30 07:30:01,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:30:01,939 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:30:01,940 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:30:01,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:30:01,943 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:30:01,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:30:01" (1/1) ... [2023-08-30 07:30:01,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e2744e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:30:01, skipping insertion in model container [2023-08-30 07:30:01,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:30:01" (1/1) ... [2023-08-30 07:30:01,952 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:30:01,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:30:02,104 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-min.wvr.c[2815,2828] [2023-08-30 07:30:02,122 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:30:02,136 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 07:30:02,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:30:02,169 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-min.wvr.c[2815,2828] [2023-08-30 07:30:02,172 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:30:02,178 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 07:30:02,205 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-min.wvr.c[2815,2828] [2023-08-30 07:30:02,215 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:30:02,221 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:30:02,223 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:30:02,227 INFO L208 MainTranslator]: Completed translation [2023-08-30 07:30:02,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:30:02 WrapperNode [2023-08-30 07:30:02,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:30:02,229 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 07:30:02,229 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 07:30:02,229 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 07:30:02,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:30:02" (1/1) ... [2023-08-30 07:30:02,253 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:30:02" (1/1) ... [2023-08-30 07:30:02,285 INFO L138 Inliner]: procedures = 28, calls = 57, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 229 [2023-08-30 07:30:02,286 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 07:30:02,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 07:30:02,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 07:30:02,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 07:30:02,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:30:02" (1/1) ... [2023-08-30 07:30:02,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:30:02" (1/1) ... [2023-08-30 07:30:02,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:30:02" (1/1) ... [2023-08-30 07:30:02,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:30:02" (1/1) ... [2023-08-30 07:30:02,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:30:02" (1/1) ... [2023-08-30 07:30:02,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:30:02" (1/1) ... [2023-08-30 07:30:02,332 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:30:02" (1/1) ... [2023-08-30 07:30:02,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:30:02" (1/1) ... [2023-08-30 07:30:02,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 07:30:02,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 07:30:02,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 07:30:02,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 07:30:02,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:30:02" (1/1) ... [2023-08-30 07:30:02,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:30:02,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:30:02,369 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) [2023-08-30 07:30:02,380 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 [2023-08-30 07:30:02,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 07:30:02,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 07:30:02,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 07:30:02,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 07:30:02,400 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 07:30:02,400 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 07:30:02,400 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 07:30:02,400 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 07:30:02,400 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 07:30:02,401 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 07:30:02,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 07:30:02,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 07:30:02,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 07:30:02,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 07:30:02,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 07:30:02,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 07:30:02,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 07:30:02,403 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 07:30:02,490 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 07:30:02,492 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 07:30:03,039 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 07:30:03,147 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 07:30:03,147 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 07:30:03,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:30:03 BoogieIcfgContainer [2023-08-30 07:30:03,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 07:30:03,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 07:30:03,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 07:30:03,154 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 07:30:03,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:30:01" (1/3) ... [2023-08-30 07:30:03,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f12f3e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:30:03, skipping insertion in model container [2023-08-30 07:30:03,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:30:02" (2/3) ... [2023-08-30 07:30:03,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f12f3e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:30:03, skipping insertion in model container [2023-08-30 07:30:03,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:30:03" (3/3) ... [2023-08-30 07:30:03,157 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-min.wvr.c [2023-08-30 07:30:03,169 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 07:30:03,169 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2023-08-30 07:30:03,169 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 07:30:03,275 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 07:30:03,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 309 places, 326 transitions, 676 flow [2023-08-30 07:30:03,432 INFO L130 PetriNetUnfolder]: 27/323 cut-off events. [2023-08-30 07:30:03,433 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:30:03,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 323 events. 27/323 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 428 event pairs, 0 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 252. Up to 3 conditions per place. [2023-08-30 07:30:03,439 INFO L82 GeneralOperation]: Start removeDead. Operand has 309 places, 326 transitions, 676 flow [2023-08-30 07:30:03,447 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 302 places, 319 transitions, 656 flow [2023-08-30 07:30:03,451 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 07:30:03,470 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 302 places, 319 transitions, 656 flow [2023-08-30 07:30:03,474 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 302 places, 319 transitions, 656 flow [2023-08-30 07:30:03,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 302 places, 319 transitions, 656 flow [2023-08-30 07:30:03,531 INFO L130 PetriNetUnfolder]: 27/319 cut-off events. [2023-08-30 07:30:03,531 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:30:03,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 319 events. 27/319 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 434 event pairs, 0 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 252. Up to 3 conditions per place. [2023-08-30 07:30:03,534 INFO L119 LiptonReduction]: Number of co-enabled transitions 5194 [2023-08-30 07:30:45,160 INFO L134 LiptonReduction]: Checked pairs total: 9038 [2023-08-30 07:30:45,160 INFO L136 LiptonReduction]: Total number of compositions: 375 [2023-08-30 07:30:45,170 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 07:30:45,175 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=PETRI_NET, 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@48f2be65, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 07:30:45,175 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2023-08-30 07:30:45,177 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 07:30:45,177 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:30:45,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:30:45,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:30:45,178 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-08-30 07:30:45,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:30:45,182 INFO L85 PathProgramCache]: Analyzing trace with hash 42350, now seen corresponding path program 1 times [2023-08-30 07:30:45,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:30:45,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250907829] [2023-08-30 07:30:45,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:30:45,190 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:30:45,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:30:45,222 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:30:45,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 07:30:45,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:30:45,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:30:45,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:30:45,543 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:30:45,544 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:30:45,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:30:45,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:30:45,587 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:30:45,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [250907829] [2023-08-30 07:30:45,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [250907829] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:30:45,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:30:45,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:30:45,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303442697] [2023-08-30 07:30:45,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:30:45,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:30:45,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:30:45,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:30:45,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:30:45,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 701 [2023-08-30 07:30:45,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 80 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:45,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:30:45,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 701 [2023-08-30 07:30:45,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:30:47,477 INFO L130 PetriNetUnfolder]: 9900/12210 cut-off events. [2023-08-30 07:30:47,478 INFO L131 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2023-08-30 07:30:47,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24567 conditions, 12210 events. 9900/12210 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 53948 event pairs, 4614 based on Foata normal form. 0/3120 useless extension candidates. Maximal degree in co-relation 22321. Up to 12128 conditions per place. [2023-08-30 07:30:47,548 INFO L137 encePairwiseOnDemand]: 686/701 looper letters, 64 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2023-08-30 07:30:47,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 72 transitions, 296 flow [2023-08-30 07:30:47,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:30:47,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:30:47,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 913 transitions. [2023-08-30 07:30:47,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414170233000476 [2023-08-30 07:30:47,565 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 913 transitions. [2023-08-30 07:30:47,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 913 transitions. [2023-08-30 07:30:47,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:30:47,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 913 transitions. [2023-08-30 07:30:47,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 304.3333333333333) internal successors, (913), 3 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:47,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 701.0) internal successors, (2804), 4 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:47,585 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 701.0) internal successors, (2804), 4 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:47,586 INFO L175 Difference]: Start difference. First operand has 81 places, 80 transitions, 178 flow. Second operand 3 states and 913 transitions. [2023-08-30 07:30:47,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 72 transitions, 296 flow [2023-08-30 07:30:47,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 72 transitions, 284 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 07:30:47,594 INFO L231 Difference]: Finished difference. Result has 67 places, 71 transitions, 163 flow [2023-08-30 07:30:47,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=67, PETRI_TRANSITIONS=71} [2023-08-30 07:30:47,598 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -14 predicate places. [2023-08-30 07:30:47,598 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 71 transitions, 163 flow [2023-08-30 07:30:47,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:47,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:30:47,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:30:47,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-30 07:30:47,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:30:47,807 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-08-30 07:30:47,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:30:47,808 INFO L85 PathProgramCache]: Analyzing trace with hash 42349, now seen corresponding path program 1 times [2023-08-30 07:30:47,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:30:47,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021989109] [2023-08-30 07:30:47,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:30:47,809 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:30:47,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:30:47,821 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:30:47,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 07:30:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:30:47,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 07:30:47,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:30:47,920 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 07:30:47,921 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 07:30:47,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:30:47,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:30:47,935 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:30:47,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021989109] [2023-08-30 07:30:47,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021989109] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:30:47,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:30:47,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:30:47,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343685400] [2023-08-30 07:30:47,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:30:47,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:30:47,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:30:47,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:30:47,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:30:48,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 701 [2023-08-30 07:30:48,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 71 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:48,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:30:48,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 701 [2023-08-30 07:30:48,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:30:49,359 INFO L130 PetriNetUnfolder]: 9900/12206 cut-off events. [2023-08-30 07:30:49,359 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 07:30:49,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24424 conditions, 12206 events. 9900/12206 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 53927 event pairs, 4614 based on Foata normal form. 2/3122 useless extension candidates. Maximal degree in co-relation 24400. Up to 12125 conditions per place. [2023-08-30 07:30:49,398 INFO L137 encePairwiseOnDemand]: 697/701 looper letters, 62 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2023-08-30 07:30:49,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 68 transitions, 283 flow [2023-08-30 07:30:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:30:49,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:30:49,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 898 transitions. [2023-08-30 07:30:49,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270090347123157 [2023-08-30 07:30:49,401 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 898 transitions. [2023-08-30 07:30:49,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 898 transitions. [2023-08-30 07:30:49,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:30:49,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 898 transitions. [2023-08-30 07:30:49,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 299.3333333333333) internal successors, (898), 3 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:49,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 701.0) internal successors, (2804), 4 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:49,407 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 701.0) internal successors, (2804), 4 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:49,407 INFO L175 Difference]: Start difference. First operand has 67 places, 71 transitions, 163 flow. Second operand 3 states and 898 transitions. [2023-08-30 07:30:49,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 68 transitions, 283 flow [2023-08-30 07:30:49,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 68 transitions, 278 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 07:30:49,409 INFO L231 Difference]: Finished difference. Result has 65 places, 68 transitions, 154 flow [2023-08-30 07:30:49,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=65, PETRI_TRANSITIONS=68} [2023-08-30 07:30:49,410 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -16 predicate places. [2023-08-30 07:30:49,410 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 68 transitions, 154 flow [2023-08-30 07:30:49,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:49,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:30:49,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:30:49,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 07:30:49,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:30:49,622 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-08-30 07:30:49,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:30:49,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1317318, now seen corresponding path program 1 times [2023-08-30 07:30:49,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:30:49,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674658071] [2023-08-30 07:30:49,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:30:49,623 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:30:49,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:30:49,624 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:30:49,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 07:30:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:30:49,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:30:49,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:30:49,780 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:30:49,781 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:30:49,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:30:49,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:30:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:30:49,954 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:30:49,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674658071] [2023-08-30 07:30:49,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674658071] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:30:49,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:30:49,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 07:30:49,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110561957] [2023-08-30 07:30:49,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:30:49,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:30:49,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:30:49,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:30:49,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:30:50,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 701 [2023-08-30 07:30:50,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 68 transitions, 154 flow. Second operand has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:50,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:30:50,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 701 [2023-08-30 07:30:50,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:30:55,940 INFO L130 PetriNetUnfolder]: 29713/36628 cut-off events. [2023-08-30 07:30:55,940 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-08-30 07:30:55,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73272 conditions, 36628 events. 29713/36628 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 2618. Compared 181270 event pairs, 13842 based on Foata normal form. 0/9798 useless extension candidates. Maximal degree in co-relation 73264. Up to 12131 conditions per place. [2023-08-30 07:30:56,085 INFO L137 encePairwiseOnDemand]: 685/701 looper letters, 164 selfloop transitions, 35 changer transitions 0/204 dead transitions. [2023-08-30 07:30:56,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 204 transitions, 848 flow [2023-08-30 07:30:56,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:30:56,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:30:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1788 transitions. [2023-08-30 07:30:56,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42510699001426533 [2023-08-30 07:30:56,090 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1788 transitions. [2023-08-30 07:30:56,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1788 transitions. [2023-08-30 07:30:56,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:30:56,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1788 transitions. [2023-08-30 07:30:56,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:56,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 701.0) internal successors, (4907), 7 states have internal predecessors, (4907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:56,099 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 701.0) internal successors, (4907), 7 states have internal predecessors, (4907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:56,099 INFO L175 Difference]: Start difference. First operand has 65 places, 68 transitions, 154 flow. Second operand 6 states and 1788 transitions. [2023-08-30 07:30:56,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 204 transitions, 848 flow [2023-08-30 07:30:56,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 204 transitions, 847 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:30:56,102 INFO L231 Difference]: Finished difference. Result has 74 places, 100 transitions, 427 flow [2023-08-30 07:30:56,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=427, PETRI_PLACES=74, PETRI_TRANSITIONS=100} [2023-08-30 07:30:56,103 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -7 predicate places. [2023-08-30 07:30:56,103 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 100 transitions, 427 flow [2023-08-30 07:30:56,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:56,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:30:56,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 07:30:56,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 07:30:56,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:30:56,311 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-08-30 07:30:56,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:30:56,312 INFO L85 PathProgramCache]: Analyzing trace with hash 40874337, now seen corresponding path program 1 times [2023-08-30 07:30:56,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:30:56,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [439438155] [2023-08-30 07:30:56,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:30:56,313 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:30:56,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:30:56,314 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:30:56,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 07:30:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:30:56,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 07:30:56,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:30:56,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:30:56,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:30:56,402 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:30:56,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [439438155] [2023-08-30 07:30:56,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [439438155] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:30:56,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:30:56,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:30:56,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102097079] [2023-08-30 07:30:56,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:30:56,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:30:56,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:30:56,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:30:56,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:30:56,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 701 [2023-08-30 07:30:56,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 100 transitions, 427 flow. Second operand has 3 states, 3 states have (on average 282.3333333333333) internal successors, (847), 3 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:56,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:30:56,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 701 [2023-08-30 07:30:56,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:30:59,524 INFO L130 PetriNetUnfolder]: 29712/36627 cut-off events. [2023-08-30 07:30:59,524 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2023-08-30 07:30:59,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73400 conditions, 36627 events. 29712/36627 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 3053. Compared 183085 event pairs, 13842 based on Foata normal form. 1/9379 useless extension candidates. Maximal degree in co-relation 73386. Up to 36384 conditions per place. [2023-08-30 07:30:59,679 INFO L137 encePairwiseOnDemand]: 698/701 looper letters, 92 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-08-30 07:30:59,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 99 transitions, 611 flow [2023-08-30 07:30:59,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:30:59,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:30:59,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 906 transitions. [2023-08-30 07:30:59,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43081312410841655 [2023-08-30 07:30:59,682 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 906 transitions. [2023-08-30 07:30:59,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 906 transitions. [2023-08-30 07:30:59,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:30:59,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 906 transitions. [2023-08-30 07:30:59,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.0) internal successors, (906), 3 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:59,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 701.0) internal successors, (2804), 4 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:59,688 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 701.0) internal successors, (2804), 4 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:59,688 INFO L175 Difference]: Start difference. First operand has 74 places, 100 transitions, 427 flow. Second operand 3 states and 906 transitions. [2023-08-30 07:30:59,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 99 transitions, 611 flow [2023-08-30 07:30:59,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 99 transitions, 599 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-30 07:30:59,690 INFO L231 Difference]: Finished difference. Result has 76 places, 99 transitions, 415 flow [2023-08-30 07:30:59,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=415, PETRI_PLACES=76, PETRI_TRANSITIONS=99} [2023-08-30 07:30:59,691 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -5 predicate places. [2023-08-30 07:30:59,691 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 99 transitions, 415 flow [2023-08-30 07:30:59,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 282.3333333333333) internal successors, (847), 3 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:59,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:30:59,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:30:59,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 07:30:59,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:30:59,905 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-08-30 07:30:59,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:30:59,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1266118544, now seen corresponding path program 1 times [2023-08-30 07:30:59,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:30:59,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284384198] [2023-08-30 07:30:59,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:30:59,906 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:30:59,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:30:59,907 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:30:59,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 07:30:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:30:59,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 07:30:59,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:31:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:31:00,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:31:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:31:00,137 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:31:00,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284384198] [2023-08-30 07:31:00,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284384198] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:31:00,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:31:00,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-30 07:31:00,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767170172] [2023-08-30 07:31:00,137 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:31:00,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:31:00,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:31:00,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:31:00,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:31:00,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 701 [2023-08-30 07:31:00,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 99 transitions, 415 flow. Second operand has 8 states, 8 states have (on average 274.125) internal successors, (2193), 8 states have internal predecessors, (2193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:31:00,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:31:00,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 701 [2023-08-30 07:31:00,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:31:06,382 INFO L130 PetriNetUnfolder]: 49514/61037 cut-off events. [2023-08-30 07:31:06,382 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2023-08-30 07:31:06,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122285 conditions, 61037 events. 49514/61037 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 4670. Compared 320135 event pairs, 23070 based on Foata normal form. 4/16500 useless extension candidates. Maximal degree in co-relation 122269. Up to 36377 conditions per place. [2023-08-30 07:31:06,720 INFO L137 encePairwiseOnDemand]: 685/701 looper letters, 187 selfloop transitions, 31 changer transitions 0/223 dead transitions. [2023-08-30 07:31:06,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 223 transitions, 1247 flow [2023-08-30 07:31:06,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 07:31:06,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 07:31:06,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2392 transitions. [2023-08-30 07:31:06,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42653352353780316 [2023-08-30 07:31:06,726 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2392 transitions. [2023-08-30 07:31:06,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2392 transitions. [2023-08-30 07:31:06,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:31:06,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2392 transitions. [2023-08-30 07:31:06,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 299.0) internal successors, (2392), 8 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:31:06,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 701.0) internal successors, (6309), 9 states have internal predecessors, (6309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:31:06,738 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 701.0) internal successors, (6309), 9 states have internal predecessors, (6309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:31:06,738 INFO L175 Difference]: Start difference. First operand has 76 places, 99 transitions, 415 flow. Second operand 8 states and 2392 transitions. [2023-08-30 07:31:06,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 223 transitions, 1247 flow [2023-08-30 07:31:06,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 223 transitions, 1243 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:31:06,742 INFO L231 Difference]: Finished difference. Result has 86 places, 119 transitions, 713 flow [2023-08-30 07:31:06,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=713, PETRI_PLACES=86, PETRI_TRANSITIONS=119} [2023-08-30 07:31:06,743 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 5 predicate places. [2023-08-30 07:31:06,743 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 119 transitions, 713 flow [2023-08-30 07:31:06,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 274.125) internal successors, (2193), 8 states have internal predecessors, (2193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:31:06,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:31:06,744 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 07:31:06,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-08-30 07:31:06,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:31:06,953 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-08-30 07:31:06,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:31:06,954 INFO L85 PathProgramCache]: Analyzing trace with hash 593951598, now seen corresponding path program 2 times [2023-08-30 07:31:06,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:31:06,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128311104] [2023-08-30 07:31:06,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:31:06,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:31:06,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:31:06,956 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:31:06,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 07:31:07,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:31:07,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:31:07,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 07:31:07,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:31:07,121 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:31:07,121 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:31:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:31:07,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:31:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:31:07,672 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:31:07,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [128311104] [2023-08-30 07:31:07,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [128311104] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:31:07,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:31:07,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 07:31:07,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326469005] [2023-08-30 07:31:07,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:31:07,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:31:07,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:31:07,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:31:07,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:31:13,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 701 [2023-08-30 07:31:13,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 119 transitions, 713 flow. Second operand has 12 states, 12 states have (on average 267.0) internal successors, (3204), 12 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:31:13,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:31:13,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 701 [2023-08-30 07:31:13,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:31:17,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:31:18,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:31:20,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:31:21,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:31:23,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:31:25,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:31:26,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:31:28,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:31:30,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:31:32,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:31:34,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:31:36,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:31:38,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:31:39,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:01,202 INFO L130 PetriNetUnfolder]: 128680/158616 cut-off events. [2023-08-30 07:32:01,202 INFO L131 PetriNetUnfolder]: For 332/332 co-relation queries the response was YES. [2023-08-30 07:32:01,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317747 conditions, 158616 events. 128680/158616 cut-off events. For 332/332 co-relation queries the response was YES. Maximal size of possible extension queue 8338. Compared 889010 event pairs, 59982 based on Foata normal form. 15/42996 useless extension candidates. Maximal degree in co-relation 317726. Up to 24235 conditions per place. [2023-08-30 07:32:02,174 INFO L137 encePairwiseOnDemand]: 685/701 looper letters, 523 selfloop transitions, 85 changer transitions 0/613 dead transitions. [2023-08-30 07:32:02,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 613 transitions, 3389 flow [2023-08-30 07:32:02,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 07:32:02,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 07:32:02,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 5391 transitions. [2023-08-30 07:32:02,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.427246790299572 [2023-08-30 07:32:02,187 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 5391 transitions. [2023-08-30 07:32:02,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 5391 transitions. [2023-08-30 07:32:02,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:32:02,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 5391 transitions. [2023-08-30 07:32:02,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 299.5) internal successors, (5391), 18 states have internal predecessors, (5391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:02,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 701.0) internal successors, (13319), 19 states have internal predecessors, (13319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:02,211 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 701.0) internal successors, (13319), 19 states have internal predecessors, (13319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:02,212 INFO L175 Difference]: Start difference. First operand has 86 places, 119 transitions, 713 flow. Second operand 18 states and 5391 transitions. [2023-08-30 07:32:02,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 613 transitions, 3389 flow [2023-08-30 07:32:02,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 613 transitions, 3389 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 07:32:02,220 INFO L231 Difference]: Finished difference. Result has 114 places, 170 transitions, 1343 flow [2023-08-30 07:32:02,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1343, PETRI_PLACES=114, PETRI_TRANSITIONS=170} [2023-08-30 07:32:02,221 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 33 predicate places. [2023-08-30 07:32:02,221 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 170 transitions, 1343 flow [2023-08-30 07:32:02,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 267.0) internal successors, (3204), 12 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:02,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:32:02,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:32:02,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 07:32:02,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:32:02,451 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-08-30 07:32:02,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:32:02,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1263115871, now seen corresponding path program 1 times [2023-08-30 07:32:02,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:32:02,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838519907] [2023-08-30 07:32:02,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:32:02,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:32:02,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:32:02,453 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:32:02,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 07:32:02,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:32:02,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 07:32:02,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:32:02,687 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:32:02,687 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:32:02,764 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 07:32:02,765 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 07:32:02,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:32:02,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 07:32:02,906 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 07:32:02,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 07:32:02,969 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-08-30 07:32:02,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 07:32:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:32:03,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:32:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:32:07,358 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:32:07,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838519907] [2023-08-30 07:32:07,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838519907] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:32:07,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:32:07,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 07:32:07,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602836350] [2023-08-30 07:32:07,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:32:07,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:32:07,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:32:07,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:32:07,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:32:10,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 701 [2023-08-30 07:32:10,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 170 transitions, 1343 flow. Second operand has 10 states, 10 states have (on average 250.4) internal successors, (2504), 10 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:10,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:32:10,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 701 [2023-08-30 07:32:10,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:32:25,417 WARN L222 SmtUtils]: Spent 9.36s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:32:30,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:32:32,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 07:32:34,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:32:37,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:32:39,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:32:41,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:32:43,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 07:32:45,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:32:47,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:32:50,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:33:31,164 INFO L130 PetriNetUnfolder]: 237548/292784 cut-off events. [2023-08-30 07:33:31,164 INFO L131 PetriNetUnfolder]: For 694/694 co-relation queries the response was YES. [2023-08-30 07:33:32,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586775 conditions, 292784 events. 237548/292784 cut-off events. For 694/694 co-relation queries the response was YES. Maximal size of possible extension queue 12217. Compared 1729906 event pairs, 110736 based on Foata normal form. 3/79910 useless extension candidates. Maximal degree in co-relation 586741. Up to 84789 conditions per place. [2023-08-30 07:33:33,488 INFO L137 encePairwiseOnDemand]: 685/701 looper letters, 467 selfloop transitions, 153 changer transitions 0/625 dead transitions. [2023-08-30 07:33:33,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 625 transitions, 4280 flow [2023-08-30 07:33:33,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 07:33:33,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 07:33:33,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5760 transitions. [2023-08-30 07:33:33,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39127776645608314 [2023-08-30 07:33:33,500 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5760 transitions. [2023-08-30 07:33:33,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5760 transitions. [2023-08-30 07:33:33,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:33:33,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5760 transitions. [2023-08-30 07:33:33,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 274.2857142857143) internal successors, (5760), 21 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:33:33,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 701.0) internal successors, (15422), 22 states have internal predecessors, (15422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:33:33,520 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 701.0) internal successors, (15422), 22 states have internal predecessors, (15422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:33:33,520 INFO L175 Difference]: Start difference. First operand has 114 places, 170 transitions, 1343 flow. Second operand 21 states and 5760 transitions. [2023-08-30 07:33:33,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 625 transitions, 4280 flow [2023-08-30 07:33:33,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 625 transitions, 4055 flow, removed 31 selfloop flow, removed 4 redundant places. [2023-08-30 07:33:33,532 INFO L231 Difference]: Finished difference. Result has 139 places, 239 transitions, 2317 flow [2023-08-30 07:33:33,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2317, PETRI_PLACES=139, PETRI_TRANSITIONS=239} [2023-08-30 07:33:33,533 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 58 predicate places. [2023-08-30 07:33:33,533 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 239 transitions, 2317 flow [2023-08-30 07:33:33,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 250.4) internal successors, (2504), 10 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:33:33,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:33:33,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:33:33,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 07:33:33,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:33:33,744 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-08-30 07:33:33,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:33:33,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1263115909, now seen corresponding path program 1 times [2023-08-30 07:33:33,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:33:33,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1379327771] [2023-08-30 07:33:33,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:33:33,745 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:33:33,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:33:33,746 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:33:33,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 07:33:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:33:33,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:33:33,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:33:34,031 INFO L321 Elim1Store]: treesize reduction 103, result has 24.8 percent of original size [2023-08-30 07:33:34,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 59 [2023-08-30 07:33:34,446 INFO L321 Elim1Store]: treesize reduction 48, result has 68.6 percent of original size [2023-08-30 07:33:34,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 163 [2023-08-30 07:33:44,952 INFO L321 Elim1Store]: treesize reduction 72, result has 75.1 percent of original size [2023-08-30 07:33:44,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 126 treesize of output 329 Killed by 15