./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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/unroll-cond-5.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 b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 01:29:15,478 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 01:29:15,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 01:29:15,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 01:29:15,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 01:29:15,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 01:29:15,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 01:29:15,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 01:29:15,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 01:29:15,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 01:29:15,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 01:29:15,542 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 01:29:15,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 01:29:15,544 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 01:29:15,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 01:29:15,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 01:29:15,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 01:29:15,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 01:29:15,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 01:29:15,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 01:29:15,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 01:29:15,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 01:29:15,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 01:29:15,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 01:29:15,567 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 01:29:15,568 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 01:29:15,568 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 01:29:15,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 01:29:15,570 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 01:29:15,571 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 01:29:15,571 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 01:29:15,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 01:29:15,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 01:29:15,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 01:29:15,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 01:29:15,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 01:29:15,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 01:29:15,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 01:29:15,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 01:29:15,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 01:29:15,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 01:29:15,584 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 01:29:15,616 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 01:29:15,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 01:29:15,618 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 01:29:15,618 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 01:29:15,619 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 01:29:15,619 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 01:29:15,619 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 01:29:15,620 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 01:29:15,620 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 01:29:15,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 01:29:15,621 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 01:29:15,621 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 01:29:15,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 01:29:15,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 01:29:15,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 01:29:15,622 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 01:29:15,622 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 01:29:15,622 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 01:29:15,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 01:29:15,623 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 01:29:15,623 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 01:29:15,623 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 01:29:15,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 01:29:15,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 01:29:15,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 01:29:15,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:29:15,624 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 01:29:15,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 01:29:15,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 01:29:15,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 01:29:15,625 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 01:29:15,625 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 01:29:15,625 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 01:29:15,625 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 01:29:15,626 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 01:29:15,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 01:29:15,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 01:29:15,985 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 01:29:15,986 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 01:29:15,987 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 01:29:15,988 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c [2023-08-30 01:29:17,224 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 01:29:17,455 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 01:29:17,455 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c [2023-08-30 01:29:17,460 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e6b2e3ad/ccfae6109ec6448fbc08857f04dd4739/FLAG7fa486092 [2023-08-30 01:29:17,472 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e6b2e3ad/ccfae6109ec6448fbc08857f04dd4739 [2023-08-30 01:29:17,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 01:29:17,476 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 01:29:17,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 01:29:17,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 01:29:17,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 01:29:17,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:29:17" (1/1) ... [2023-08-30 01:29:17,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b7c1217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:29:17, skipping insertion in model container [2023-08-30 01:29:17,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:29:17" (1/1) ... [2023-08-30 01:29:17,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 01:29:17,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:29:17,674 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/unroll-cond-5.wvr.c[2975,2988] [2023-08-30 01:29:17,690 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:29:17,702 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 01:29:17,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7cd81e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:29:17, skipping insertion in model container [2023-08-30 01:29:17,705 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 01:29:17,705 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 01:29:17,707 INFO L158 Benchmark]: Toolchain (without parser) took 230.34ms. Allocated memory is still 71.3MB. Free memory was 48.3MB in the beginning and 38.4MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 01:29:17,707 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 58.7MB. Free memory is still 36.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 01:29:17,708 INFO L158 Benchmark]: CACSL2BoogieTranslator took 228.64ms. Allocated memory is still 71.3MB. Free memory was 48.1MB in the beginning and 38.4MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 01:29:17,710 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 58.7MB. Free memory is still 36.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 228.64ms. Allocated memory is still 71.3MB. Free memory was 48.1MB in the beginning and 38.4MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 124]: 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/unroll-cond-5.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 b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 01:29:19,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 01:29:19,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 01:29:19,444 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 01:29:19,444 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 01:29:19,445 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 01:29:19,446 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 01:29:19,448 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 01:29:19,450 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 01:29:19,455 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 01:29:19,456 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 01:29:19,457 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 01:29:19,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 01:29:19,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 01:29:19,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 01:29:19,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 01:29:19,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 01:29:19,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 01:29:19,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 01:29:19,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 01:29:19,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 01:29:19,473 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 01:29:19,474 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 01:29:19,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 01:29:19,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 01:29:19,486 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 01:29:19,486 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 01:29:19,487 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 01:29:19,488 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 01:29:19,489 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 01:29:19,490 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 01:29:19,490 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 01:29:19,491 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 01:29:19,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 01:29:19,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 01:29:19,494 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 01:29:19,495 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 01:29:19,495 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 01:29:19,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 01:29:19,496 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 01:29:19,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 01:29:19,500 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 01:29:19,529 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 01:29:19,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 01:29:19,530 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 01:29:19,530 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 01:29:19,531 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 01:29:19,531 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 01:29:19,533 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 01:29:19,533 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 01:29:19,533 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 01:29:19,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 01:29:19,534 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 01:29:19,534 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 01:29:19,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 01:29:19,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 01:29:19,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 01:29:19,535 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 01:29:19,535 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 01:29:19,536 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 01:29:19,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 01:29:19,536 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 01:29:19,536 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 01:29:19,536 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 01:29:19,537 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 01:29:19,537 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 01:29:19,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 01:29:19,537 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 01:29:19,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 01:29:19,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:29:19,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 01:29:19,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 01:29:19,538 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 01:29:19,538 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 01:29:19,539 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 01:29:19,539 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 01:29:19,539 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 01:29:19,539 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 01:29:19,540 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 01:29:19,540 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 01:29:19,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 01:29:19,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 01:29:19,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 01:29:19,838 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 01:29:19,838 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 01:29:19,839 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c [2023-08-30 01:29:21,061 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 01:29:21,292 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 01:29:21,293 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c [2023-08-30 01:29:21,302 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82f007e86/ff96e8a9279549bd81503f8f8e4cb67e/FLAG03b222de7 [2023-08-30 01:29:21,322 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82f007e86/ff96e8a9279549bd81503f8f8e4cb67e [2023-08-30 01:29:21,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 01:29:21,327 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 01:29:21,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 01:29:21,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 01:29:21,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 01:29:21,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:29:21" (1/1) ... [2023-08-30 01:29:21,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@741fe4fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:29:21, skipping insertion in model container [2023-08-30 01:29:21,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:29:21" (1/1) ... [2023-08-30 01:29:21,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 01:29:21,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:29:21,544 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/unroll-cond-5.wvr.c[2975,2988] [2023-08-30 01:29:21,551 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:29:21,564 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 01:29:21,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:29:21,599 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/unroll-cond-5.wvr.c[2975,2988] [2023-08-30 01:29:21,605 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:29:21,615 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 01:29:21,650 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/unroll-cond-5.wvr.c[2975,2988] [2023-08-30 01:29:21,654 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:29:21,673 INFO L208 MainTranslator]: Completed translation [2023-08-30 01:29:21,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:29:21 WrapperNode [2023-08-30 01:29:21,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 01:29:21,675 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 01:29:21,675 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 01:29:21,675 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 01:29:21,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:29:21" (1/1) ... [2023-08-30 01:29:21,688 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:29:21" (1/1) ... [2023-08-30 01:29:21,712 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 205 [2023-08-30 01:29:21,713 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 01:29:21,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 01:29:21,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 01:29:21,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 01:29:21,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:29:21" (1/1) ... [2023-08-30 01:29:21,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:29:21" (1/1) ... [2023-08-30 01:29:21,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:29:21" (1/1) ... [2023-08-30 01:29:21,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:29:21" (1/1) ... [2023-08-30 01:29:21,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:29:21" (1/1) ... [2023-08-30 01:29:21,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:29:21" (1/1) ... [2023-08-30 01:29:21,762 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:29:21" (1/1) ... [2023-08-30 01:29:21,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:29:21" (1/1) ... [2023-08-30 01:29:21,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 01:29:21,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 01:29:21,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 01:29:21,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 01:29:21,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:29:21" (1/1) ... [2023-08-30 01:29:21,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:29:21,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 01:29:21,810 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 01:29:21,828 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 01:29:21,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 01:29:21,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 01:29:21,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 01:29:21,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 01:29:21,854 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 01:29:21,855 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 01:29:21,855 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 01:29:21,855 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 01:29:21,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 01:29:21,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 01:29:21,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 01:29:21,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 01:29:21,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 01:29:21,857 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 01:29:22,013 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 01:29:22,014 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 01:29:22,643 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 01:29:22,651 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 01:29:22,651 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 01:29:22,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 01:29:22 BoogieIcfgContainer [2023-08-30 01:29:22,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 01:29:22,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 01:29:22,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 01:29:22,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 01:29:22,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 01:29:21" (1/3) ... [2023-08-30 01:29:22,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75fd1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 01:29:22, skipping insertion in model container [2023-08-30 01:29:22,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:29:21" (2/3) ... [2023-08-30 01:29:22,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75fd1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 01:29:22, skipping insertion in model container [2023-08-30 01:29:22,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 01:29:22" (3/3) ... [2023-08-30 01:29:22,661 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-5.wvr.c [2023-08-30 01:29:22,675 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 01:29:22,675 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-08-30 01:29:22,675 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 01:29:22,792 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 01:29:22,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 265 places, 282 transitions, 580 flow [2023-08-30 01:29:22,918 INFO L130 PetriNetUnfolder]: 24/280 cut-off events. [2023-08-30 01:29:22,918 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 01:29:22,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 280 events. 24/280 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 662 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 185. Up to 2 conditions per place. [2023-08-30 01:29:22,931 INFO L82 GeneralOperation]: Start removeDead. Operand has 265 places, 282 transitions, 580 flow [2023-08-30 01:29:22,942 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 259 places, 276 transitions, 564 flow [2023-08-30 01:29:22,947 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 01:29:22,964 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 259 places, 276 transitions, 564 flow [2023-08-30 01:29:22,970 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 259 places, 276 transitions, 564 flow [2023-08-30 01:29:22,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 276 transitions, 564 flow [2023-08-30 01:29:23,028 INFO L130 PetriNetUnfolder]: 24/276 cut-off events. [2023-08-30 01:29:23,028 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 01:29:23,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 276 events. 24/276 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 654 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 185. Up to 2 conditions per place. [2023-08-30 01:29:23,037 INFO L119 LiptonReduction]: Number of co-enabled transitions 9784 [2023-08-30 01:30:18,653 INFO L134 LiptonReduction]: Checked pairs total: 9546 [2023-08-30 01:30:18,653 INFO L136 LiptonReduction]: Total number of compositions: 338 [2023-08-30 01:30:18,664 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 01:30:18,670 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;@29a6e929, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 01:30:18,670 INFO L358 AbstractCegarLoop]: Starting to check reachability of 54 error locations. [2023-08-30 01:30:18,673 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 01:30:18,673 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 01:30:18,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:30:18,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 01:30:18,674 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:30:18,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:30:18,678 INFO L85 PathProgramCache]: Analyzing trace with hash 38306, now seen corresponding path program 1 times [2023-08-30 01:30:18,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:30:18,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1934082087] [2023-08-30 01:30:18,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:30:18,691 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 01:30:18,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:30:18,695 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 01:30:18,698 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 01:30:18,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:30:18,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 01:30:18,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:30:18,999 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:30:19,000 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:30:19,043 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 01:30:19,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:30:19,044 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:30:19,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1934082087] [2023-08-30 01:30:19,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1934082087] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:30:19,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:30:19,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:30:19,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816353096] [2023-08-30 01:30:19,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:30:19,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:30:19,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:30:19,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:30:19,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:30:19,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 620 [2023-08-30 01:30:19,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 255.66666666666666) internal successors, (767), 3 states have internal predecessors, (767), 0 states have call successors, (0), 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 01:30:19,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:30:19,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 620 [2023-08-30 01:30:19,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:30:20,815 INFO L130 PetriNetUnfolder]: 2313/3184 cut-off events. [2023-08-30 01:30:20,816 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2023-08-30 01:30:20,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6420 conditions, 3184 events. 2313/3184 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 16964 event pairs, 1132 based on Foata normal form. 0/620 useless extension candidates. Maximal degree in co-relation 2778. Up to 1588 conditions per place. [2023-08-30 01:30:20,834 INFO L137 encePairwiseOnDemand]: 612/620 looper letters, 78 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-30 01:30:20,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 82 transitions, 348 flow [2023-08-30 01:30:20,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:30:20,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:30:20,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 856 transitions. [2023-08-30 01:30:20,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46021505376344085 [2023-08-30 01:30:20,857 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 856 transitions. [2023-08-30 01:30:20,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 856 transitions. [2023-08-30 01:30:20,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:30:20,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 856 transitions. [2023-08-30 01:30:20,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 285.3333333333333) internal successors, (856), 3 states have internal predecessors, (856), 0 states have call successors, (0), 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 01:30:20,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 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 01:30:20,874 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 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 01:30:20,876 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 108 flow. Second operand 3 states and 856 transitions. [2023-08-30 01:30:20,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 82 transitions, 348 flow [2023-08-30 01:30:20,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 82 transitions, 332 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 01:30:20,883 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 102 flow [2023-08-30 01:30:20,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2023-08-30 01:30:20,888 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2023-08-30 01:30:20,888 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 102 flow [2023-08-30 01:30:20,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.66666666666666) internal successors, (767), 3 states have internal predecessors, (767), 0 states have call successors, (0), 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 01:30:20,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:30:20,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 01:30:20,902 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 (2)] Forceful destruction successful, exit code 0 [2023-08-30 01:30:21,098 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 01:30:21,099 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:30:21,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:30:21,100 INFO L85 PathProgramCache]: Analyzing trace with hash 38391, now seen corresponding path program 1 times [2023-08-30 01:30:21,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:30:21,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677808180] [2023-08-30 01:30:21,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:30:21,101 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 01:30:21,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:30:21,102 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 01:30:21,105 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 01:30:21,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:30:21,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 01:30:21,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:30:21,195 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 01:30:21,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:30:21,196 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:30:21,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677808180] [2023-08-30 01:30:21,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677808180] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:30:21,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:30:21,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:30:21,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807200963] [2023-08-30 01:30:21,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:30:21,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:30:21,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:30:21,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:30:21,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:30:21,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 620 [2023-08-30 01:30:21,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:30:21,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:30:21,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 620 [2023-08-30 01:30:21,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:30:21,986 INFO L130 PetriNetUnfolder]: 1157/1595 cut-off events. [2023-08-30 01:30:21,986 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 01:30:21,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3199 conditions, 1595 events. 1157/1595 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 7781 event pairs, 566 based on Foata normal form. 0/306 useless extension candidates. Maximal degree in co-relation 3186. Up to 1588 conditions per place. [2023-08-30 01:30:21,994 INFO L137 encePairwiseOnDemand]: 615/620 looper letters, 41 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-30 01:30:21,994 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 190 flow [2023-08-30 01:30:21,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:30:21,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:30:21,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 814 transitions. [2023-08-30 01:30:21,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4376344086021505 [2023-08-30 01:30:21,997 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 814 transitions. [2023-08-30 01:30:21,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 814 transitions. [2023-08-30 01:30:21,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:30:21,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 814 transitions. [2023-08-30 01:30:22,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 271.3333333333333) internal successors, (814), 3 states have internal predecessors, (814), 0 states have call successors, (0), 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 01:30:22,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 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 01:30:22,006 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 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 01:30:22,006 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 102 flow. Second operand 3 states and 814 transitions. [2023-08-30 01:30:22,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 190 flow [2023-08-30 01:30:22,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:30:22,008 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 112 flow [2023-08-30 01:30:22,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2023-08-30 01:30:22,009 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -4 predicate places. [2023-08-30 01:30:22,010 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 112 flow [2023-08-30 01:30:22,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:30:22,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:30:22,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 01:30:22,023 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 01:30:22,220 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 01:30:22,220 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:30:22,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:30:22,221 INFO L85 PathProgramCache]: Analyzing trace with hash 38305, now seen corresponding path program 1 times [2023-08-30 01:30:22,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:30:22,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899283255] [2023-08-30 01:30:22,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:30:22,222 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 01:30:22,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:30:22,227 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 01:30:22,228 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 01:30:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:30:22,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 01:30:22,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:30:22,356 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 01:30:22,357 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 01:30:22,366 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 01:30:22,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:30:22,367 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:30:22,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899283255] [2023-08-30 01:30:22,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1899283255] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:30:22,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:30:22,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:30:22,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403674398] [2023-08-30 01:30:22,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:30:22,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:30:22,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:30:22,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:30:22,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:30:22,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 620 [2023-08-30 01:30:22,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 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 01:30:22,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:30:22,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 620 [2023-08-30 01:30:22,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:30:23,069 INFO L130 PetriNetUnfolder]: 1157/1593 cut-off events. [2023-08-30 01:30:23,069 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 01:30:23,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3201 conditions, 1593 events. 1157/1593 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 7660 event pairs, 566 based on Foata normal form. 2/307 useless extension candidates. Maximal degree in co-relation 3187. Up to 1587 conditions per place. [2023-08-30 01:30:23,077 INFO L137 encePairwiseOnDemand]: 618/620 looper letters, 40 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-30 01:30:23,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 43 transitions, 192 flow [2023-08-30 01:30:23,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:30:23,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:30:23,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 803 transitions. [2023-08-30 01:30:23,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43172043010752686 [2023-08-30 01:30:23,081 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 803 transitions. [2023-08-30 01:30:23,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 803 transitions. [2023-08-30 01:30:23,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:30:23,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 803 transitions. [2023-08-30 01:30:23,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 267.6666666666667) internal successors, (803), 3 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:30:23,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 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 01:30:23,087 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 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 01:30:23,088 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 112 flow. Second operand 3 states and 803 transitions. [2023-08-30 01:30:23,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 43 transitions, 192 flow [2023-08-30 01:30:23,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 43 transitions, 186 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 01:30:23,089 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 106 flow [2023-08-30 01:30:23,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-08-30 01:30:23,090 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2023-08-30 01:30:23,091 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 106 flow [2023-08-30 01:30:23,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 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 01:30:23,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:30:23,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 01:30:23,100 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 01:30:23,300 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 01:30:23,300 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:30:23,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:30:23,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1190173, now seen corresponding path program 1 times [2023-08-30 01:30:23,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:30:23,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213769607] [2023-08-30 01:30:23,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:30:23,302 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 01:30:23,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:30:23,306 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 01:30:23,309 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 01:30:23,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:30:23,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 01:30:23,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:30:23,425 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:30:23,426 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:30:23,482 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 01:30:23,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:30:23,678 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 01:30:23,678 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:30:23,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213769607] [2023-08-30 01:30:23,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213769607] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:30:23,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:30:23,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 01:30:23,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222167754] [2023-08-30 01:30:23,679 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:30:23,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 01:30:23,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:30:23,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 01:30:23,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 01:30:24,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 620 [2023-08-30 01:30:24,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 106 flow. Second operand has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 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 01:30:24,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:30:24,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 620 [2023-08-30 01:30:24,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:30:26,250 INFO L130 PetriNetUnfolder]: 2319/3191 cut-off events. [2023-08-30 01:30:26,251 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 01:30:26,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6407 conditions, 3191 events. 2319/3191 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 17116 event pairs, 1132 based on Foata normal form. 0/627 useless extension candidates. Maximal degree in co-relation 6398. Up to 1590 conditions per place. [2023-08-30 01:30:26,267 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 76 selfloop transitions, 11 changer transitions 0/89 dead transitions. [2023-08-30 01:30:26,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 89 transitions, 400 flow [2023-08-30 01:30:26,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 01:30:26,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 01:30:26,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1584 transitions. [2023-08-30 01:30:26,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258064516129032 [2023-08-30 01:30:26,272 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1584 transitions. [2023-08-30 01:30:26,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1584 transitions. [2023-08-30 01:30:26,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:30:26,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1584 transitions. [2023-08-30 01:30:26,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 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 01:30:26,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 620.0) internal successors, (4340), 7 states have internal predecessors, (4340), 0 states have call successors, (0), 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 01:30:26,285 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 620.0) internal successors, (4340), 7 states have internal predecessors, (4340), 0 states have call successors, (0), 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 01:30:26,285 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 106 flow. Second operand 6 states and 1584 transitions. [2023-08-30 01:30:26,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 89 transitions, 400 flow [2023-08-30 01:30:26,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 89 transitions, 399 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:30:26,287 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 203 flow [2023-08-30 01:30:26,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=203, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2023-08-30 01:30:26,288 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2023-08-30 01:30:26,288 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 203 flow [2023-08-30 01:30:26,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 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 01:30:26,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:30:26,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 01:30:26,300 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 (5)] Ended with exit code 0 [2023-08-30 01:30:26,498 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 01:30:26,498 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:30:26,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:30:26,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1190258, now seen corresponding path program 1 times [2023-08-30 01:30:26,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:30:26,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117975309] [2023-08-30 01:30:26,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:30:26,499 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 01:30:26,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:30:26,500 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 01:30:26,501 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 01:30:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:30:26,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 01:30:26,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:30:26,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:30:26,635 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2023-08-30 01:30:26,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 26 [2023-08-30 01:30:26,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 01:30:26,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:30:26,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:30:26,726 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:30:26,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117975309] [2023-08-30 01:30:26,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117975309] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:30:26,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:30:26,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:30:26,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661799395] [2023-08-30 01:30:26,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:30:26,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:30:26,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:30:26,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:30:26,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:30:26,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 620 [2023-08-30 01:30:26,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 203 flow. Second operand has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 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 01:30:26,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:30:26,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 620 [2023-08-30 01:30:26,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:30:27,579 INFO L130 PetriNetUnfolder]: 1735/2435 cut-off events. [2023-08-30 01:30:27,579 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-30 01:30:27,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4923 conditions, 2435 events. 1735/2435 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 12965 event pairs, 846 based on Foata normal form. 0/535 useless extension candidates. Maximal degree in co-relation 4909. Up to 2423 conditions per place. [2023-08-30 01:30:27,597 INFO L137 encePairwiseOnDemand]: 617/620 looper letters, 45 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-08-30 01:30:27,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 48 transitions, 269 flow [2023-08-30 01:30:27,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:30:27,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:30:27,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 802 transitions. [2023-08-30 01:30:27,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4311827956989247 [2023-08-30 01:30:27,601 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 802 transitions. [2023-08-30 01:30:27,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 802 transitions. [2023-08-30 01:30:27,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:30:27,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 802 transitions. [2023-08-30 01:30:27,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 0 states have call successors, (0), 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 01:30:27,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 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 01:30:27,608 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 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 01:30:27,608 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 203 flow. Second operand 3 states and 802 transitions. [2023-08-30 01:30:27,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 48 transitions, 269 flow [2023-08-30 01:30:27,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 48 transitions, 251 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-30 01:30:27,612 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 161 flow [2023-08-30 01:30:27,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=161, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-08-30 01:30:27,615 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2023-08-30 01:30:27,616 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 161 flow [2023-08-30 01:30:27,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 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 01:30:27,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:30:27,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 01:30:27,631 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 (6)] Forceful destruction successful, exit code 0 [2023-08-30 01:30:27,825 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 01:30:27,826 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:30:27,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:30:27,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1190259, now seen corresponding path program 1 times [2023-08-30 01:30:27,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:30:27,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185867887] [2023-08-30 01:30:27,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:30:27,827 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 01:30:27,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:30:27,829 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 01:30:27,830 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 01:30:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:30:27,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 01:30:27,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:30:27,941 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2023-08-30 01:30:27,941 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 3 case distinctions, treesize of input 22 treesize of output 33 [2023-08-30 01:30:27,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:30:27,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:30:27,961 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:30:27,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185867887] [2023-08-30 01:30:27,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185867887] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:30:27,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:30:27,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:30:27,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751290651] [2023-08-30 01:30:27,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:30:27,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:30:27,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:30:27,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:30:27,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:30:28,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 620 [2023-08-30 01:30:28,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 0 states have call successors, (0), 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 01:30:28,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:30:28,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 620 [2023-08-30 01:30:28,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:30:28,676 INFO L130 PetriNetUnfolder]: 1151/1679 cut-off events. [2023-08-30 01:30:28,676 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-30 01:30:28,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3394 conditions, 1679 events. 1151/1679 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 9009 event pairs, 560 based on Foata normal form. 0/457 useless extension candidates. Maximal degree in co-relation 3379. Up to 1667 conditions per place. [2023-08-30 01:30:28,684 INFO L137 encePairwiseOnDemand]: 617/620 looper letters, 41 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-08-30 01:30:28,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 44 transitions, 223 flow [2023-08-30 01:30:28,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:30:28,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:30:28,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 791 transitions. [2023-08-30 01:30:28,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252688172043011 [2023-08-30 01:30:28,688 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 791 transitions. [2023-08-30 01:30:28,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 791 transitions. [2023-08-30 01:30:28,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:30:28,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 791 transitions. [2023-08-30 01:30:28,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 263.6666666666667) internal successors, (791), 3 states have internal predecessors, (791), 0 states have call successors, (0), 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 01:30:28,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 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 01:30:28,693 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 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 01:30:28,693 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 161 flow. Second operand 3 states and 791 transitions. [2023-08-30 01:30:28,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 44 transitions, 223 flow [2023-08-30 01:30:28,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 44 transitions, 222 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:30:28,696 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 140 flow [2023-08-30 01:30:28,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2023-08-30 01:30:28,699 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2023-08-30 01:30:28,699 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 140 flow [2023-08-30 01:30:28,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 0 states have call successors, (0), 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 01:30:28,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:30:28,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 01:30:28,713 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 01:30:28,909 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 01:30:28,909 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:30:28,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:30:28,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1143863866, now seen corresponding path program 1 times [2023-08-30 01:30:28,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:30:28,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774681544] [2023-08-30 01:30:28,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:30:28,910 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 01:30:28,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:30:28,913 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 01:30:28,920 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 01:30:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:30:28,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 01:30:28,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:30:29,014 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 01:30:29,014 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 2 case distinctions, treesize of input 12 treesize of output 22 [2023-08-30 01:30:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:30:29,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:30:29,034 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:30:29,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774681544] [2023-08-30 01:30:29,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774681544] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:30:29,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:30:29,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:30:29,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935771498] [2023-08-30 01:30:29,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:30:29,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:30:29,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:30:29,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:30:29,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:30:29,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 620 [2023-08-30 01:30:29,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 252.66666666666666) internal successors, (758), 3 states have internal predecessors, (758), 0 states have call successors, (0), 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 01:30:29,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:30:29,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 620 [2023-08-30 01:30:29,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:30:29,676 INFO L130 PetriNetUnfolder]: 1073/1557 cut-off events. [2023-08-30 01:30:29,676 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-30 01:30:29,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3151 conditions, 1557 events. 1073/1557 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 8262 event pairs, 522 based on Foata normal form. 0/449 useless extension candidates. Maximal degree in co-relation 3135. Up to 1545 conditions per place. [2023-08-30 01:30:29,684 INFO L137 encePairwiseOnDemand]: 617/620 looper letters, 39 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-08-30 01:30:29,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 216 flow [2023-08-30 01:30:29,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:30:29,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:30:29,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 789 transitions. [2023-08-30 01:30:29,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4241935483870968 [2023-08-30 01:30:29,687 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 789 transitions. [2023-08-30 01:30:29,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 789 transitions. [2023-08-30 01:30:29,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:30:29,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 789 transitions. [2023-08-30 01:30:29,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 263.0) internal successors, (789), 3 states have internal predecessors, (789), 0 states have call successors, (0), 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 01:30:29,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 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 01:30:29,693 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 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 01:30:29,693 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 140 flow. Second operand 3 states and 789 transitions. [2023-08-30 01:30:29,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 216 flow [2023-08-30 01:30:29,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 42 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:30:29,694 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 137 flow [2023-08-30 01:30:29,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-08-30 01:30:29,695 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2023-08-30 01:30:29,695 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 137 flow [2023-08-30 01:30:29,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 252.66666666666666) internal successors, (758), 3 states have internal predecessors, (758), 0 states have call successors, (0), 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 01:30:29,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:30:29,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 01:30:29,711 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 01:30:29,906 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 01:30:29,906 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:30:29,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:30:29,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1143863865, now seen corresponding path program 1 times [2023-08-30 01:30:29,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:30:29,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022863912] [2023-08-30 01:30:29,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:30:29,908 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 01:30:29,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:30:29,909 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 01:30:29,949 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 01:30:29,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:30:29,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 01:30:29,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:30:30,059 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:30:30,059 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:30:30,249 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 01:30:30,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:30:30,414 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 01:30:30,414 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:30:30,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022863912] [2023-08-30 01:30:30,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022863912] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:30:30,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:30:30,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 01:30:30,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836167984] [2023-08-30 01:30:30,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:30:30,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 01:30:30,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:30:30,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 01:30:30,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 01:30:31,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 620 [2023-08-30 01:30:31,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 137 flow. Second operand has 8 states, 8 states have (on average 246.25) internal successors, (1970), 8 states have internal predecessors, (1970), 0 states have call successors, (0), 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 01:30:31,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:30:31,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 620 [2023-08-30 01:30:31,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:30:32,729 INFO L130 PetriNetUnfolder]: 995/1435 cut-off events. [2023-08-30 01:30:32,730 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-30 01:30:32,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2908 conditions, 1435 events. 995/1435 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 7351 event pairs, 484 based on Foata normal form. 0/446 useless extension candidates. Maximal degree in co-relation 2891. Up to 714 conditions per place. [2023-08-30 01:30:32,737 INFO L137 encePairwiseOnDemand]: 616/620 looper letters, 64 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2023-08-30 01:30:32,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 69 transitions, 335 flow [2023-08-30 01:30:32,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 01:30:32,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 01:30:32,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1292 transitions. [2023-08-30 01:30:32,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4167741935483871 [2023-08-30 01:30:32,743 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1292 transitions. [2023-08-30 01:30:32,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1292 transitions. [2023-08-30 01:30:32,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:30:32,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1292 transitions. [2023-08-30 01:30:32,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 258.4) internal successors, (1292), 5 states have internal predecessors, (1292), 0 states have call successors, (0), 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 01:30:32,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 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 01:30:32,751 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 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 01:30:32,751 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 137 flow. Second operand 5 states and 1292 transitions. [2023-08-30 01:30:32,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 69 transitions, 335 flow [2023-08-30 01:30:32,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 69 transitions, 334 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:30:32,754 INFO L231 Difference]: Finished difference. Result has 53 places, 40 transitions, 138 flow [2023-08-30 01:30:32,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=138, PETRI_PLACES=53, PETRI_TRANSITIONS=40} [2023-08-30 01:30:32,756 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2023-08-30 01:30:32,756 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 138 flow [2023-08-30 01:30:32,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 246.25) internal successors, (1970), 8 states have internal predecessors, (1970), 0 states have call successors, (0), 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 01:30:32,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:30:32,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 01:30:32,773 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 (9)] Forceful destruction successful, exit code 0 [2023-08-30 01:30:32,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /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 01:30:32,967 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:30:32,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:30:32,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1100030081, now seen corresponding path program 1 times [2023-08-30 01:30:32,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:30:32,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161382932] [2023-08-30 01:30:32,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:30:32,968 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 01:30:32,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:30:32,970 INFO L229 MonitoredProcess]: Starting monitored process 10 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 01:30:32,972 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 (10)] Waiting until timeout for monitored process [2023-08-30 01:30:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:30:33,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 01:30:33,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:30:33,074 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 01:30:33,075 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 01:30:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:30:33,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:30:33,100 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:30:33,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161382932] [2023-08-30 01:30:33,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161382932] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:30:33,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:30:33,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:30:33,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86940718] [2023-08-30 01:30:33,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:30:33,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:30:33,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:30:33,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:30:33,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:30:33,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 620 [2023-08-30 01:30:33,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 233.25) internal successors, (933), 4 states have internal predecessors, (933), 0 states have call successors, (0), 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 01:30:33,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:30:33,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 620 [2023-08-30 01:30:33,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:30:33,760 INFO L130 PetriNetUnfolder]: 555/823 cut-off events. [2023-08-30 01:30:33,760 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-30 01:30:33,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1687 conditions, 823 events. 555/823 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 3964 event pairs, 266 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 1669. Up to 806 conditions per place. [2023-08-30 01:30:33,763 INFO L137 encePairwiseOnDemand]: 612/620 looper letters, 28 selfloop transitions, 4 changer transitions 0/34 dead transitions. [2023-08-30 01:30:33,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 34 transitions, 190 flow [2023-08-30 01:30:33,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:30:33,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:30:33,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 960 transitions. [2023-08-30 01:30:33,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2023-08-30 01:30:33,767 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 960 transitions. [2023-08-30 01:30:33,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 960 transitions. [2023-08-30 01:30:33,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:30:33,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 960 transitions. [2023-08-30 01:30:33,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 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 01:30:33,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 620.0) internal successors, (3100), 5 states have internal predecessors, (3100), 0 states have call successors, (0), 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 01:30:33,773 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 620.0) internal successors, (3100), 5 states have internal predecessors, (3100), 0 states have call successors, (0), 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 01:30:33,773 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 138 flow. Second operand 4 states and 960 transitions. [2023-08-30 01:30:33,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 34 transitions, 190 flow [2023-08-30 01:30:33,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 34 transitions, 185 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 01:30:33,775 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 129 flow [2023-08-30 01:30:33,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2023-08-30 01:30:33,775 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2023-08-30 01:30:33,776 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 129 flow [2023-08-30 01:30:33,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 233.25) internal successors, (933), 4 states have internal predecessors, (933), 0 states have call successors, (0), 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 01:30:33,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:30:33,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 01:30:33,788 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 (10)] Forceful destruction successful, exit code 0 [2023-08-30 01:30:33,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /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 01:30:33,986 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:30:33,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:30:33,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1100030079, now seen corresponding path program 1 times [2023-08-30 01:30:33,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:30:33,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501100232] [2023-08-30 01:30:33,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:30:33,987 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 01:30:33,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:30:33,988 INFO L229 MonitoredProcess]: Starting monitored process 11 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 01:30:33,991 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 (11)] Waiting until timeout for monitored process [2023-08-30 01:30:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:30:34,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:30:34,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:30:34,110 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 01:30:34,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:30:34,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2023-08-30 01:30:34,299 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 01:30:34,299 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:30:34,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501100232] [2023-08-30 01:30:34,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501100232] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:30:34,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:30:34,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 01:30:34,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868491955] [2023-08-30 01:30:34,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:30:34,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 01:30:34,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:30:34,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 01:30:34,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 01:30:35,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 620 [2023-08-30 01:30:35,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 129 flow. Second operand has 8 states, 8 states have (on average 247.25) internal successors, (1978), 8 states have internal predecessors, (1978), 0 states have call successors, (0), 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 01:30:35,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:30:35,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 620 [2023-08-30 01:30:35,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:30:37,172 INFO L130 PetriNetUnfolder]: 713/1087 cut-off events. [2023-08-30 01:30:37,172 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2023-08-30 01:30:37,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2224 conditions, 1087 events. 713/1087 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 5537 event pairs, 200 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 2206. Up to 695 conditions per place. [2023-08-30 01:30:37,176 INFO L137 encePairwiseOnDemand]: 615/620 looper letters, 65 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2023-08-30 01:30:37,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 76 transitions, 376 flow [2023-08-30 01:30:37,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 01:30:37,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 01:30:37,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1794 transitions. [2023-08-30 01:30:37,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4133640552995392 [2023-08-30 01:30:37,181 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1794 transitions. [2023-08-30 01:30:37,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1794 transitions. [2023-08-30 01:30:37,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:30:37,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1794 transitions. [2023-08-30 01:30:37,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 256.2857142857143) internal successors, (1794), 7 states have internal predecessors, (1794), 0 states have call successors, (0), 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 01:30:37,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 620.0) internal successors, (4960), 8 states have internal predecessors, (4960), 0 states have call successors, (0), 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 01:30:37,191 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 620.0) internal successors, (4960), 8 states have internal predecessors, (4960), 0 states have call successors, (0), 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 01:30:37,191 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 129 flow. Second operand 7 states and 1794 transitions. [2023-08-30 01:30:37,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 76 transitions, 376 flow [2023-08-30 01:30:37,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 76 transitions, 370 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:30:37,193 INFO L231 Difference]: Finished difference. Result has 53 places, 37 transitions, 167 flow [2023-08-30 01:30:37,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=167, PETRI_PLACES=53, PETRI_TRANSITIONS=37} [2023-08-30 01:30:37,194 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2023-08-30 01:30:37,194 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 167 flow [2023-08-30 01:30:37,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 247.25) internal successors, (1978), 8 states have internal predecessors, (1978), 0 states have call successors, (0), 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 01:30:37,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:30:37,195 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 01:30:37,207 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 (11)] Forceful destruction successful, exit code 0 [2023-08-30 01:30:37,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /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 01:30:37,404 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:30:37,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:30:37,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1099373666, now seen corresponding path program 2 times [2023-08-30 01:30:37,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:30:37,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150734332] [2023-08-30 01:30:37,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:30:37,405 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 01:30:37,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:30:37,406 INFO L229 MonitoredProcess]: Starting monitored process 12 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 01:30:37,406 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 (12)] Waiting until timeout for monitored process [2023-08-30 01:30:37,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:30:37,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:30:37,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 01:30:37,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:30:37,546 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:30:37,546 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:30:37,682 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 01:30:37,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:30:38,234 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 01:30:38,235 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:30:38,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150734332] [2023-08-30 01:30:38,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150734332] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:30:38,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:30:38,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 01:30:38,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712674387] [2023-08-30 01:30:38,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:30:38,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 01:30:38,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:30:38,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 01:30:38,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 01:30:43,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 620 [2023-08-30 01:30:43,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 37 transitions, 167 flow. Second operand has 12 states, 12 states have (on average 251.0) internal successors, (3012), 12 states have internal predecessors, (3012), 0 states have call successors, (0), 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 01:30:43,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:30:43,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 620 [2023-08-30 01:30:43,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:30:48,436 INFO L130 PetriNetUnfolder]: 2972/4640 cut-off events. [2023-08-30 01:30:48,436 INFO L131 PetriNetUnfolder]: For 1170/1170 co-relation queries the response was YES. [2023-08-30 01:30:48,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10502 conditions, 4640 events. 2972/4640 cut-off events. For 1170/1170 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 29991 event pairs, 1719 based on Foata normal form. 6/2481 useless extension candidates. Maximal degree in co-relation 10482. Up to 511 conditions per place. [2023-08-30 01:30:48,451 INFO L137 encePairwiseOnDemand]: 616/620 looper letters, 218 selfloop transitions, 12 changer transitions 0/232 dead transitions. [2023-08-30 01:30:48,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 232 transitions, 1190 flow [2023-08-30 01:30:48,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 01:30:48,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 01:30:48,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3227 transitions. [2023-08-30 01:30:48,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4337365591397849 [2023-08-30 01:30:48,461 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3227 transitions. [2023-08-30 01:30:48,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3227 transitions. [2023-08-30 01:30:48,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:30:48,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3227 transitions. [2023-08-30 01:30:48,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 268.9166666666667) internal successors, (3227), 12 states have internal predecessors, (3227), 0 states have call successors, (0), 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 01:30:48,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 620.0) internal successors, (8060), 13 states have internal predecessors, (8060), 0 states have call successors, (0), 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 01:30:48,477 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 620.0) internal successors, (8060), 13 states have internal predecessors, (8060), 0 states have call successors, (0), 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 01:30:48,477 INFO L175 Difference]: Start difference. First operand has 53 places, 37 transitions, 167 flow. Second operand 12 states and 3227 transitions. [2023-08-30 01:30:48,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 232 transitions, 1190 flow [2023-08-30 01:30:48,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 232 transitions, 1174 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-30 01:30:48,481 INFO L231 Difference]: Finished difference. Result has 68 places, 44 transitions, 253 flow [2023-08-30 01:30:48,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=253, PETRI_PLACES=68, PETRI_TRANSITIONS=44} [2023-08-30 01:30:48,482 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 16 predicate places. [2023-08-30 01:30:48,482 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 44 transitions, 253 flow [2023-08-30 01:30:48,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 251.0) internal successors, (3012), 12 states have internal predecessors, (3012), 0 states have call successors, (0), 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 01:30:48,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:30:48,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:30:48,495 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 (12)] Forceful destruction successful, exit code 0 [2023-08-30 01:30:48,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /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 01:30:48,696 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:30:48,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:30:48,696 INFO L85 PathProgramCache]: Analyzing trace with hash -258804763, now seen corresponding path program 1 times [2023-08-30 01:30:48,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:30:48,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383418124] [2023-08-30 01:30:48,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:30:48,697 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 01:30:48,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:30:48,698 INFO L229 MonitoredProcess]: Starting monitored process 13 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 01:30:48,701 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 (13)] Waiting until timeout for monitored process [2023-08-30 01:30:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:30:48,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 01:30:48,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:30:48,844 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:30:48,849 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:30:48,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:30:48,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:30:49,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:30:49,640 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:30:49,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383418124] [2023-08-30 01:30:49,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [383418124] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:30:49,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:30:49,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 01:30:49,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389737371] [2023-08-30 01:30:49,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:30:49,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 01:30:49,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:30:49,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 01:30:49,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 01:30:58,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 620 [2023-08-30 01:30:58,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 44 transitions, 253 flow. Second operand has 8 states, 8 states have (on average 246.5) internal successors, (1972), 8 states have internal predecessors, (1972), 0 states have call successors, (0), 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 01:30:58,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:30:58,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 620 [2023-08-30 01:30:58,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:31:02,136 INFO L130 PetriNetUnfolder]: 2153/3419 cut-off events. [2023-08-30 01:31:02,136 INFO L131 PetriNetUnfolder]: For 921/921 co-relation queries the response was YES. [2023-08-30 01:31:02,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7776 conditions, 3419 events. 2153/3419 cut-off events. For 921/921 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 21190 event pairs, 1236 based on Foata normal form. 21/1936 useless extension candidates. Maximal degree in co-relation 7749. Up to 3055 conditions per place. [2023-08-30 01:31:02,149 INFO L137 encePairwiseOnDemand]: 606/620 looper letters, 56 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2023-08-30 01:31:02,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 69 transitions, 452 flow [2023-08-30 01:31:02,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 01:31:02,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 01:31:02,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2282 transitions. [2023-08-30 01:31:02,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4089605734767025 [2023-08-30 01:31:02,157 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2282 transitions. [2023-08-30 01:31:02,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2282 transitions. [2023-08-30 01:31:02,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:31:02,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2282 transitions. [2023-08-30 01:31:02,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 253.55555555555554) internal successors, (2282), 9 states have internal predecessors, (2282), 0 states have call successors, (0), 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 01:31:02,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 620.0) internal successors, (6200), 10 states have internal predecessors, (6200), 0 states have call successors, (0), 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 01:31:02,168 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 620.0) internal successors, (6200), 10 states have internal predecessors, (6200), 0 states have call successors, (0), 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 01:31:02,168 INFO L175 Difference]: Start difference. First operand has 68 places, 44 transitions, 253 flow. Second operand 9 states and 2282 transitions. [2023-08-30 01:31:02,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 69 transitions, 452 flow [2023-08-30 01:31:02,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 69 transitions, 427 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 01:31:02,171 INFO L231 Difference]: Finished difference. Result has 74 places, 44 transitions, 293 flow [2023-08-30 01:31:02,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=293, PETRI_PLACES=74, PETRI_TRANSITIONS=44} [2023-08-30 01:31:02,172 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 22 predicate places. [2023-08-30 01:31:02,172 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 44 transitions, 293 flow [2023-08-30 01:31:02,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 246.5) internal successors, (1972), 8 states have internal predecessors, (1972), 0 states have call successors, (0), 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 01:31:02,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:31:02,173 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 01:31:02,182 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 (13)] Forceful destruction successful, exit code 0 [2023-08-30 01:31:02,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /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 01:31:02,382 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:31:02,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:31:02,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1138574166, now seen corresponding path program 2 times [2023-08-30 01:31:02,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:31:02,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527486917] [2023-08-30 01:31:02,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:31:02,383 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 01:31:02,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:31:02,385 INFO L229 MonitoredProcess]: Starting monitored process 14 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 01:31:02,387 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 (14)] Waiting until timeout for monitored process [2023-08-30 01:31:02,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 01:31:02,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:31:02,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 01:31:02,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:31:02,525 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:31:02,525 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:31:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 01:31:02,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:31:02,619 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:31:02,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527486917] [2023-08-30 01:31:02,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527486917] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:31:02,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:31:02,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:31:02,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701764029] [2023-08-30 01:31:02,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:31:02,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:31:02,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:31:02,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:31:02,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:31:02,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 620 [2023-08-30 01:31:02,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 44 transitions, 293 flow. Second operand has 4 states, 4 states have (on average 252.5) internal successors, (1010), 4 states have internal predecessors, (1010), 0 states have call successors, (0), 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 01:31:02,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:31:02,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 620 [2023-08-30 01:31:02,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:31:03,472 INFO L130 PetriNetUnfolder]: 515/977 cut-off events. [2023-08-30 01:31:03,473 INFO L131 PetriNetUnfolder]: For 955/955 co-relation queries the response was YES. [2023-08-30 01:31:03,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2262 conditions, 977 events. 515/977 cut-off events. For 955/955 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5377 event pairs, 270 based on Foata normal form. 138/899 useless extension candidates. Maximal degree in co-relation 2232. Up to 919 conditions per place. [2023-08-30 01:31:03,476 INFO L137 encePairwiseOnDemand]: 608/620 looper letters, 26 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2023-08-30 01:31:03,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 34 transitions, 293 flow [2023-08-30 01:31:03,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:31:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:31:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1030 transitions. [2023-08-30 01:31:03,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153225806451613 [2023-08-30 01:31:03,479 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1030 transitions. [2023-08-30 01:31:03,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1030 transitions. [2023-08-30 01:31:03,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:31:03,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1030 transitions. [2023-08-30 01:31:03,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 257.5) internal successors, (1030), 4 states have internal predecessors, (1030), 0 states have call successors, (0), 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 01:31:03,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 620.0) internal successors, (3100), 5 states have internal predecessors, (3100), 0 states have call successors, (0), 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 01:31:03,484 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 620.0) internal successors, (3100), 5 states have internal predecessors, (3100), 0 states have call successors, (0), 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 01:31:03,484 INFO L175 Difference]: Start difference. First operand has 74 places, 44 transitions, 293 flow. Second operand 4 states and 1030 transitions. [2023-08-30 01:31:03,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 34 transitions, 293 flow [2023-08-30 01:31:03,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 34 transitions, 246 flow, removed 6 selfloop flow, removed 12 redundant places. [2023-08-30 01:31:03,487 INFO L231 Difference]: Finished difference. Result has 55 places, 34 transitions, 194 flow [2023-08-30 01:31:03,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=55, PETRI_TRANSITIONS=34} [2023-08-30 01:31:03,488 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2023-08-30 01:31:03,488 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 34 transitions, 194 flow [2023-08-30 01:31:03,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 252.5) internal successors, (1010), 4 states have internal predecessors, (1010), 0 states have call successors, (0), 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 01:31:03,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:31:03,488 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 01:31:03,500 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 (14)] Forceful destruction successful, exit code 0 [2023-08-30 01:31:03,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /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 01:31:03,697 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:31:03,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:31:03,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1326886270, now seen corresponding path program 3 times [2023-08-30 01:31:03,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:31:03,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362957263] [2023-08-30 01:31:03,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 01:31:03,698 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 01:31:03,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:31:03,699 INFO L229 MonitoredProcess]: Starting monitored process 15 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 01:31:03,700 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 (15)] Waiting until timeout for monitored process [2023-08-30 01:31:03,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 01:31:03,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:31:03,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 01:31:03,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:31:03,960 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:31:03,960 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:31:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:31:04,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:31:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:31:06,368 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:31:06,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362957263] [2023-08-30 01:31:06,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362957263] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:31:06,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:31:06,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 01:31:06,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807180600] [2023-08-30 01:31:06,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:31:06,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 01:31:06,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:31:06,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 01:31:06,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 01:31:24,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 620 [2023-08-30 01:31:24,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 34 transitions, 194 flow. Second operand has 24 states, 24 states have (on average 250.0) internal successors, (6000), 24 states have internal predecessors, (6000), 0 states have call successors, (0), 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 01:31:24,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:31:24,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 620 [2023-08-30 01:31:24,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:31:40,805 INFO L130 PetriNetUnfolder]: 1199/2273 cut-off events. [2023-08-30 01:31:40,806 INFO L131 PetriNetUnfolder]: For 753/753 co-relation queries the response was YES. [2023-08-30 01:31:40,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5037 conditions, 2273 events. 1199/2273 cut-off events. For 753/753 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 13353 event pairs, 630 based on Foata normal form. 12/1861 useless extension candidates. Maximal degree in co-relation 5014. Up to 504 conditions per place. [2023-08-30 01:31:40,816 INFO L137 encePairwiseOnDemand]: 616/620 looper letters, 295 selfloop transitions, 25 changer transitions 0/322 dead transitions. [2023-08-30 01:31:40,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 322 transitions, 1810 flow [2023-08-30 01:31:40,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 01:31:40,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 01:31:40,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 6536 transitions. [2023-08-30 01:31:40,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4216774193548387 [2023-08-30 01:31:40,831 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 6536 transitions. [2023-08-30 01:31:40,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 6536 transitions. [2023-08-30 01:31:40,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:31:40,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 6536 transitions. [2023-08-30 01:31:40,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 261.44) internal successors, (6536), 25 states have internal predecessors, (6536), 0 states have call successors, (0), 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 01:31:40,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 620.0) internal successors, (16120), 26 states have internal predecessors, (16120), 0 states have call successors, (0), 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 01:31:40,868 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 620.0) internal successors, (16120), 26 states have internal predecessors, (16120), 0 states have call successors, (0), 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 01:31:40,868 INFO L175 Difference]: Start difference. First operand has 55 places, 34 transitions, 194 flow. Second operand 25 states and 6536 transitions. [2023-08-30 01:31:40,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 322 transitions, 1810 flow [2023-08-30 01:31:40,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 322 transitions, 1786 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:31:40,875 INFO L231 Difference]: Finished difference. Result has 78 places, 47 transitions, 330 flow [2023-08-30 01:31:40,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=330, PETRI_PLACES=78, PETRI_TRANSITIONS=47} [2023-08-30 01:31:40,876 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 26 predicate places. [2023-08-30 01:31:40,876 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 47 transitions, 330 flow [2023-08-30 01:31:40,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 250.0) internal successors, (6000), 24 states have internal predecessors, (6000), 0 states have call successors, (0), 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 01:31:40,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:31:40,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:31:40,889 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 (15)] Forceful destruction successful, exit code 0 [2023-08-30 01:31:41,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /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 01:31:41,089 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:31:41,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:31:41,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1178195579, now seen corresponding path program 1 times [2023-08-30 01:31:41,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:31:41,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2069004453] [2023-08-30 01:31:41,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:31:41,090 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 01:31:41,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:31:41,091 INFO L229 MonitoredProcess]: Starting monitored process 16 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 01:31:41,094 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 (16)] Waiting until timeout for monitored process [2023-08-30 01:31:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:31:41,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 01:31:41,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:31:41,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:31:41,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:31:41,261 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:31:41,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2069004453] [2023-08-30 01:31:41,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2069004453] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:31:41,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:31:41,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 01:31:41,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817704669] [2023-08-30 01:31:41,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:31:41,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 01:31:41,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:31:41,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 01:31:41,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 01:31:41,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 620 [2023-08-30 01:31:41,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 47 transitions, 330 flow. Second operand has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 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 01:31:41,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:31:41,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 620 [2023-08-30 01:31:41,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:31:42,080 INFO L130 PetriNetUnfolder]: 1493/2798 cut-off events. [2023-08-30 01:31:42,080 INFO L131 PetriNetUnfolder]: For 370/370 co-relation queries the response was YES. [2023-08-30 01:31:42,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6295 conditions, 2798 events. 1493/2798 cut-off events. For 370/370 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 15690 event pairs, 504 based on Foata normal form. 0/2504 useless extension candidates. Maximal degree in co-relation 6271. Up to 1560 conditions per place. [2023-08-30 01:31:42,089 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 62 selfloop transitions, 6 changer transitions 0/68 dead transitions. [2023-08-30 01:31:42,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 68 transitions, 513 flow [2023-08-30 01:31:42,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 01:31:42,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 01:31:42,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1236 transitions. [2023-08-30 01:31:42,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3987096774193548 [2023-08-30 01:31:42,094 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1236 transitions. [2023-08-30 01:31:42,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1236 transitions. [2023-08-30 01:31:42,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:31:42,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1236 transitions. [2023-08-30 01:31:42,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 247.2) internal successors, (1236), 5 states have internal predecessors, (1236), 0 states have call successors, (0), 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 01:31:42,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 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 01:31:42,100 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 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 01:31:42,100 INFO L175 Difference]: Start difference. First operand has 78 places, 47 transitions, 330 flow. Second operand 5 states and 1236 transitions. [2023-08-30 01:31:42,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 68 transitions, 513 flow [2023-08-30 01:31:42,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 437 flow, removed 21 selfloop flow, removed 16 redundant places. [2023-08-30 01:31:42,103 INFO L231 Difference]: Finished difference. Result has 69 places, 50 transitions, 289 flow [2023-08-30 01:31:42,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=289, PETRI_PLACES=69, PETRI_TRANSITIONS=50} [2023-08-30 01:31:42,104 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 17 predicate places. [2023-08-30 01:31:42,104 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 50 transitions, 289 flow [2023-08-30 01:31:42,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 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 01:31:42,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:31:42,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:31:42,117 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 (16)] Ended with exit code 0 [2023-08-30 01:31:42,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /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 01:31:42,316 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:31:42,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:31:42,316 INFO L85 PathProgramCache]: Analyzing trace with hash -86607835, now seen corresponding path program 2 times [2023-08-30 01:31:42,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:31:42,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363352250] [2023-08-30 01:31:42,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:31:42,317 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 01:31:42,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:31:42,318 INFO L229 MonitoredProcess]: Starting monitored process 17 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 01:31:42,321 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 (17)] Waiting until timeout for monitored process [2023-08-30 01:31:42,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 01:31:42,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:31:42,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 01:31:42,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:31:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:31:42,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:31:42,525 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:31:42,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363352250] [2023-08-30 01:31:42,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363352250] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:31:42,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:31:42,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 01:31:42,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092635210] [2023-08-30 01:31:42,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:31:42,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 01:31:42,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:31:42,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 01:31:42,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 01:31:42,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 620 [2023-08-30 01:31:42,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 50 transitions, 289 flow. Second operand has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 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 01:31:42,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:31:42,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 620 [2023-08-30 01:31:42,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:31:43,516 INFO L130 PetriNetUnfolder]: 2203/4127 cut-off events. [2023-08-30 01:31:43,517 INFO L131 PetriNetUnfolder]: For 3062/3062 co-relation queries the response was YES. [2023-08-30 01:31:43,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12239 conditions, 4127 events. 2203/4127 cut-off events. For 3062/3062 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 25114 event pairs, 840 based on Foata normal form. 40/3607 useless extension candidates. Maximal degree in co-relation 12218. Up to 2608 conditions per place. [2023-08-30 01:31:43,531 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 67 selfloop transitions, 8 changer transitions 0/75 dead transitions. [2023-08-30 01:31:43,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 75 transitions, 548 flow [2023-08-30 01:31:43,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 01:31:43,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 01:31:43,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1247 transitions. [2023-08-30 01:31:43,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40225806451612905 [2023-08-30 01:31:43,534 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1247 transitions. [2023-08-30 01:31:43,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1247 transitions. [2023-08-30 01:31:43,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:31:43,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1247 transitions. [2023-08-30 01:31:43,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 249.4) internal successors, (1247), 5 states have internal predecessors, (1247), 0 states have call successors, (0), 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 01:31:43,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 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 01:31:43,561 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 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 01:31:43,561 INFO L175 Difference]: Start difference. First operand has 69 places, 50 transitions, 289 flow. Second operand 5 states and 1247 transitions. [2023-08-30 01:31:43,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 75 transitions, 548 flow [2023-08-30 01:31:43,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 75 transitions, 515 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-30 01:31:43,577 INFO L231 Difference]: Finished difference. Result has 74 places, 55 transitions, 336 flow [2023-08-30 01:31:43,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=336, PETRI_PLACES=74, PETRI_TRANSITIONS=55} [2023-08-30 01:31:43,578 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 22 predicate places. [2023-08-30 01:31:43,578 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 55 transitions, 336 flow [2023-08-30 01:31:43,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 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 01:31:43,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:31:43,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:31:43,596 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 (17)] Forceful destruction successful, exit code 0 [2023-08-30 01:31:43,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /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 01:31:43,789 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:31:43,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:31:43,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1995533091, now seen corresponding path program 3 times [2023-08-30 01:31:43,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:31:43,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103509996] [2023-08-30 01:31:43,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 01:31:43,790 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 01:31:43,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:31:43,791 INFO L229 MonitoredProcess]: Starting monitored process 18 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 01:31:43,792 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 (18)] Waiting until timeout for monitored process [2023-08-30 01:31:43,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 01:31:43,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:31:43,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 01:31:43,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:31:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:31:43,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:31:43,956 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:31:43,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103509996] [2023-08-30 01:31:43,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103509996] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:31:43,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:31:43,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 01:31:43,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380516647] [2023-08-30 01:31:43,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:31:43,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 01:31:43,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:31:43,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 01:31:43,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 01:31:44,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 620 [2023-08-30 01:31:44,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 55 transitions, 336 flow. Second operand has 5 states, 5 states have (on average 241.0) internal successors, (1205), 5 states have internal predecessors, (1205), 0 states have call successors, (0), 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 01:31:44,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:31:44,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 620 [2023-08-30 01:31:44,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:31:45,134 INFO L130 PetriNetUnfolder]: 2403/4447 cut-off events. [2023-08-30 01:31:45,134 INFO L131 PetriNetUnfolder]: For 6731/6731 co-relation queries the response was YES. [2023-08-30 01:31:45,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15880 conditions, 4447 events. 2403/4447 cut-off events. For 6731/6731 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 27171 event pairs, 880 based on Foata normal form. 80/4247 useless extension candidates. Maximal degree in co-relation 15857. Up to 2368 conditions per place. [2023-08-30 01:31:45,149 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 64 selfloop transitions, 15 changer transitions 0/79 dead transitions. [2023-08-30 01:31:45,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 79 transitions, 601 flow [2023-08-30 01:31:45,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 01:31:45,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 01:31:45,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1232 transitions. [2023-08-30 01:31:45,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39741935483870966 [2023-08-30 01:31:45,152 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1232 transitions. [2023-08-30 01:31:45,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1232 transitions. [2023-08-30 01:31:45,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:31:45,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1232 transitions. [2023-08-30 01:31:45,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 246.4) internal successors, (1232), 5 states have internal predecessors, (1232), 0 states have call successors, (0), 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 01:31:45,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 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 01:31:45,156 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 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 01:31:45,156 INFO L175 Difference]: Start difference. First operand has 74 places, 55 transitions, 336 flow. Second operand 5 states and 1232 transitions. [2023-08-30 01:31:45,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 79 transitions, 601 flow [2023-08-30 01:31:45,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 79 transitions, 577 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-30 01:31:45,175 INFO L231 Difference]: Finished difference. Result has 80 places, 62 transitions, 432 flow [2023-08-30 01:31:45,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=432, PETRI_PLACES=80, PETRI_TRANSITIONS=62} [2023-08-30 01:31:45,176 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 28 predicate places. [2023-08-30 01:31:45,176 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 62 transitions, 432 flow [2023-08-30 01:31:45,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 241.0) internal successors, (1205), 5 states have internal predecessors, (1205), 0 states have call successors, (0), 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 01:31:45,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:31:45,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:31:45,186 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 (18)] Forceful destruction successful, exit code 0 [2023-08-30 01:31:45,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /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 01:31:45,385 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:31:45,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:31:45,385 INFO L85 PathProgramCache]: Analyzing trace with hash 333624601, now seen corresponding path program 4 times [2023-08-30 01:31:45,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:31:45,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976265896] [2023-08-30 01:31:45,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 01:31:45,386 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 01:31:45,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:31:45,387 INFO L229 MonitoredProcess]: Starting monitored process 19 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 01:31:45,388 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 (19)] Waiting until timeout for monitored process [2023-08-30 01:31:45,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 01:31:45,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:31:45,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 01:31:45,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:31:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:31:45,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:31:45,564 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:31:45,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976265896] [2023-08-30 01:31:45,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976265896] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:31:45,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:31:45,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 01:31:45,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802618993] [2023-08-30 01:31:45,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:31:45,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 01:31:45,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:31:45,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 01:31:45,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 01:31:45,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 620 [2023-08-30 01:31:45,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 62 transitions, 432 flow. Second operand has 5 states, 5 states have (on average 241.0) internal successors, (1205), 5 states have internal predecessors, (1205), 0 states have call successors, (0), 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 01:31:45,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:31:45,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 620 [2023-08-30 01:31:45,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:31:46,617 INFO L130 PetriNetUnfolder]: 2323/4367 cut-off events. [2023-08-30 01:31:46,617 INFO L131 PetriNetUnfolder]: For 11618/11618 co-relation queries the response was YES. [2023-08-30 01:31:46,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17083 conditions, 4367 events. 2323/4367 cut-off events. For 11618/11618 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 26632 event pairs, 1000 based on Foata normal form. 80/4167 useless extension candidates. Maximal degree in co-relation 17057. Up to 3488 conditions per place. [2023-08-30 01:31:46,632 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 62 selfloop transitions, 16 changer transitions 0/78 dead transitions. [2023-08-30 01:31:46,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 78 transitions, 677 flow [2023-08-30 01:31:46,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 01:31:46,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 01:31:46,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1226 transitions. [2023-08-30 01:31:46,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39548387096774196 [2023-08-30 01:31:46,635 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1226 transitions. [2023-08-30 01:31:46,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1226 transitions. [2023-08-30 01:31:46,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:31:46,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1226 transitions. [2023-08-30 01:31:46,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 245.2) internal successors, (1226), 5 states have internal predecessors, (1226), 0 states have call successors, (0), 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 01:31:46,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 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 01:31:46,638 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 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 01:31:46,639 INFO L175 Difference]: Start difference. First operand has 80 places, 62 transitions, 432 flow. Second operand 5 states and 1226 transitions. [2023-08-30 01:31:46,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 78 transitions, 677 flow [2023-08-30 01:31:46,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 78 transitions, 658 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 01:31:46,669 INFO L231 Difference]: Finished difference. Result has 85 places, 69 transitions, 536 flow [2023-08-30 01:31:46,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=536, PETRI_PLACES=85, PETRI_TRANSITIONS=69} [2023-08-30 01:31:46,669 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 33 predicate places. [2023-08-30 01:31:46,669 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 69 transitions, 536 flow [2023-08-30 01:31:46,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 241.0) internal successors, (1205), 5 states have internal predecessors, (1205), 0 states have call successors, (0), 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 01:31:46,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:31:46,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:31:46,678 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 (19)] Forceful destruction successful, exit code 0 [2023-08-30 01:31:46,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /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 01:31:46,870 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:31:46,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:31:46,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1933617035, now seen corresponding path program 5 times [2023-08-30 01:31:46,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:31:46,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [560621645] [2023-08-30 01:31:46,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 01:31:46,872 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 01:31:46,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:31:46,873 INFO L229 MonitoredProcess]: Starting monitored process 20 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 01:31:46,876 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 (20)] Waiting until timeout for monitored process [2023-08-30 01:31:47,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:31:47,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:31:47,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 01:31:47,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:31:47,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:31:47,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:31:47,106 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:31:47,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [560621645] [2023-08-30 01:31:47,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [560621645] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:31:47,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:31:47,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 01:31:47,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320197140] [2023-08-30 01:31:47,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:31:47,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 01:31:47,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:31:47,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 01:31:47,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 01:31:47,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 620 [2023-08-30 01:31:47,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 69 transitions, 536 flow. Second operand has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 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 01:31:47,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:31:47,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 620 [2023-08-30 01:31:47,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:31:48,261 INFO L130 PetriNetUnfolder]: 2343/4427 cut-off events. [2023-08-30 01:31:48,261 INFO L131 PetriNetUnfolder]: For 14531/14531 co-relation queries the response was YES. [2023-08-30 01:31:48,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19325 conditions, 4427 events. 2343/4427 cut-off events. For 14531/14531 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 27412 event pairs, 760 based on Foata normal form. 40/4187 useless extension candidates. Maximal degree in co-relation 19297. Up to 2408 conditions per place. [2023-08-30 01:31:48,278 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 65 selfloop transitions, 19 changer transitions 0/84 dead transitions. [2023-08-30 01:31:48,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 84 transitions, 758 flow [2023-08-30 01:31:48,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 01:31:48,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 01:31:48,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1250 transitions. [2023-08-30 01:31:48,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2023-08-30 01:31:48,280 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1250 transitions. [2023-08-30 01:31:48,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1250 transitions. [2023-08-30 01:31:48,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:31:48,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1250 transitions. [2023-08-30 01:31:48,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 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 01:31:48,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 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 01:31:48,283 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 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 01:31:48,283 INFO L175 Difference]: Start difference. First operand has 85 places, 69 transitions, 536 flow. Second operand 5 states and 1250 transitions. [2023-08-30 01:31:48,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 84 transitions, 758 flow [2023-08-30 01:31:48,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 84 transitions, 702 flow, removed 16 selfloop flow, removed 2 redundant places. [2023-08-30 01:31:48,371 INFO L231 Difference]: Finished difference. Result has 88 places, 71 transitions, 543 flow [2023-08-30 01:31:48,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=543, PETRI_PLACES=88, PETRI_TRANSITIONS=71} [2023-08-30 01:31:48,372 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 36 predicate places. [2023-08-30 01:31:48,372 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 71 transitions, 543 flow [2023-08-30 01:31:48,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 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 01:31:48,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:31:48,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:31:48,381 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 (20)] Ended with exit code 0 [2023-08-30 01:31:48,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /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 01:31:48,573 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:31:48,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:31:48,573 INFO L85 PathProgramCache]: Analyzing trace with hash -27143235, now seen corresponding path program 6 times [2023-08-30 01:31:48,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:31:48,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685600220] [2023-08-30 01:31:48,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 01:31:48,574 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 01:31:48,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:31:48,575 INFO L229 MonitoredProcess]: Starting monitored process 21 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 01:31:48,575 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 (21)] Waiting until timeout for monitored process [2023-08-30 01:31:48,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-30 01:31:48,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:31:48,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 01:31:48,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:31:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:31:48,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:31:48,746 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:31:48,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685600220] [2023-08-30 01:31:48,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685600220] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:31:48,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:31:48,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 01:31:48,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187999229] [2023-08-30 01:31:48,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:31:48,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 01:31:48,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:31:48,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 01:31:48,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 01:31:48,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 620 [2023-08-30 01:31:48,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 71 transitions, 543 flow. Second operand has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 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 01:31:48,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:31:48,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 620 [2023-08-30 01:31:48,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:31:49,832 INFO L130 PetriNetUnfolder]: 2323/4287 cut-off events. [2023-08-30 01:31:49,833 INFO L131 PetriNetUnfolder]: For 14559/14559 co-relation queries the response was YES. [2023-08-30 01:31:49,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18046 conditions, 4287 events. 2323/4287 cut-off events. For 14559/14559 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 25444 event pairs, 980 based on Foata normal form. 40/4047 useless extension candidates. Maximal degree in co-relation 18017. Up to 3348 conditions per place. [2023-08-30 01:31:49,850 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 65 selfloop transitions, 17 changer transitions 0/82 dead transitions. [2023-08-30 01:31:49,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 82 transitions, 755 flow [2023-08-30 01:31:49,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 01:31:49,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 01:31:49,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1246 transitions. [2023-08-30 01:31:49,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019354838709677 [2023-08-30 01:31:49,852 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1246 transitions. [2023-08-30 01:31:49,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1246 transitions. [2023-08-30 01:31:49,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:31:49,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1246 transitions. [2023-08-30 01:31:49,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 249.2) internal successors, (1246), 5 states have internal predecessors, (1246), 0 states have call successors, (0), 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 01:31:49,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 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 01:31:49,855 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 620.0) internal successors, (3720), 6 states have internal predecessors, (3720), 0 states have call successors, (0), 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 01:31:49,855 INFO L175 Difference]: Start difference. First operand has 88 places, 71 transitions, 543 flow. Second operand 5 states and 1246 transitions. [2023-08-30 01:31:49,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 82 transitions, 755 flow [2023-08-30 01:31:49,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 82 transitions, 705 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 01:31:49,905 INFO L231 Difference]: Finished difference. Result has 90 places, 73 transitions, 560 flow [2023-08-30 01:31:49,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=560, PETRI_PLACES=90, PETRI_TRANSITIONS=73} [2023-08-30 01:31:49,906 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 38 predicate places. [2023-08-30 01:31:49,906 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 73 transitions, 560 flow [2023-08-30 01:31:49,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 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 01:31:49,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:31:49,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:31:49,923 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 (21)] Forceful destruction successful, exit code 0 [2023-08-30 01:31:50,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /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 01:31:50,118 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:31:50,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:31:50,118 INFO L85 PathProgramCache]: Analyzing trace with hash 2095420173, now seen corresponding path program 1 times [2023-08-30 01:31:50,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:31:50,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [45349431] [2023-08-30 01:31:50,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:31:50,119 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 01:31:50,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:31:50,119 INFO L229 MonitoredProcess]: Starting monitored process 22 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 01:31:50,120 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 (22)] Waiting until timeout for monitored process [2023-08-30 01:31:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:31:50,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 01:31:50,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:31:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:31:50,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:31:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:31:50,450 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:31:50,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [45349431] [2023-08-30 01:31:50,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [45349431] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:31:50,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:31:50,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 01:31:50,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871576334] [2023-08-30 01:31:50,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:31:50,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 01:31:50,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:31:50,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 01:31:50,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-30 01:31:50,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 620 [2023-08-30 01:31:50,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 73 transitions, 560 flow. Second operand has 10 states, 10 states have (on average 241.4) internal successors, (2414), 10 states have internal predecessors, (2414), 0 states have call successors, (0), 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 01:31:50,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:31:50,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 620 [2023-08-30 01:31:50,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:31:54,364 INFO L130 PetriNetUnfolder]: 5263/9907 cut-off events. [2023-08-30 01:31:54,364 INFO L131 PetriNetUnfolder]: For 28351/28351 co-relation queries the response was YES. [2023-08-30 01:31:54,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38167 conditions, 9907 events. 5263/9907 cut-off events. For 28351/28351 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 71576 event pairs, 640 based on Foata normal form. 240/9507 useless extension candidates. Maximal degree in co-relation 38137. Up to 3121 conditions per place. [2023-08-30 01:31:54,408 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 143 selfloop transitions, 48 changer transitions 0/191 dead transitions. [2023-08-30 01:31:54,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 191 transitions, 1483 flow [2023-08-30 01:31:54,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 01:31:54,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 01:31:54,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 4684 transitions. [2023-08-30 01:31:54,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976230899830221 [2023-08-30 01:31:54,413 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 4684 transitions. [2023-08-30 01:31:54,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 4684 transitions. [2023-08-30 01:31:54,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:31:54,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 4684 transitions. [2023-08-30 01:31:54,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 246.52631578947367) internal successors, (4684), 19 states have internal predecessors, (4684), 0 states have call successors, (0), 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 01:31:54,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 620.0) internal successors, (12400), 20 states have internal predecessors, (12400), 0 states have call successors, (0), 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 01:31:54,424 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 620.0) internal successors, (12400), 20 states have internal predecessors, (12400), 0 states have call successors, (0), 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 01:31:54,424 INFO L175 Difference]: Start difference. First operand has 90 places, 73 transitions, 560 flow. Second operand 19 states and 4684 transitions. [2023-08-30 01:31:54,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 191 transitions, 1483 flow [2023-08-30 01:31:54,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 191 transitions, 1402 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 01:31:54,527 INFO L231 Difference]: Finished difference. Result has 117 places, 102 transitions, 901 flow [2023-08-30 01:31:54,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=901, PETRI_PLACES=117, PETRI_TRANSITIONS=102} [2023-08-30 01:31:54,527 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 65 predicate places. [2023-08-30 01:31:54,528 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 102 transitions, 901 flow [2023-08-30 01:31:54,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 241.4) internal successors, (2414), 10 states have internal predecessors, (2414), 0 states have call successors, (0), 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 01:31:54,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:31:54,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:31:54,537 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 (22)] Forceful destruction successful, exit code 0 [2023-08-30 01:31:54,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /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 01:31:54,729 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:31:54,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:31:54,729 INFO L85 PathProgramCache]: Analyzing trace with hash -303569723, now seen corresponding path program 2 times [2023-08-30 01:31:54,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:31:54,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497547038] [2023-08-30 01:31:54,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:31:54,730 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 01:31:54,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:31:54,731 INFO L229 MonitoredProcess]: Starting monitored process 23 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 01:31:54,733 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 (23)] Waiting until timeout for monitored process [2023-08-30 01:31:54,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:31:54,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:31:54,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 01:31:54,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:31:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:31:54,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:31:54,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 62 [2023-08-30 01:31:54,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 60 [2023-08-30 01:31:55,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:31:55,110 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:31:55,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497547038] [2023-08-30 01:31:55,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497547038] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:31:55,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:31:55,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 01:31:55,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595836903] [2023-08-30 01:31:55,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:31:55,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 01:31:55,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:31:55,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 01:31:55,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 01:31:55,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 620 [2023-08-30 01:31:55,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 102 transitions, 901 flow. Second operand has 10 states, 10 states have (on average 238.1) internal successors, (2381), 10 states have internal predecessors, (2381), 0 states have call successors, (0), 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 01:31:55,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:31:55,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 620 [2023-08-30 01:31:55,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:32:00,606 INFO L130 PetriNetUnfolder]: 7283/14087 cut-off events. [2023-08-30 01:32:00,606 INFO L131 PetriNetUnfolder]: For 71649/71649 co-relation queries the response was YES. [2023-08-30 01:32:00,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67539 conditions, 14087 events. 7283/14087 cut-off events. For 71649/71649 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 111151 event pairs, 962 based on Foata normal form. 320/13407 useless extension candidates. Maximal degree in co-relation 67497. Up to 4801 conditions per place. [2023-08-30 01:32:00,687 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 152 selfloop transitions, 73 changer transitions 0/225 dead transitions. [2023-08-30 01:32:00,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 225 transitions, 2071 flow [2023-08-30 01:32:00,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 01:32:00,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 01:32:00,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4148 transitions. [2023-08-30 01:32:00,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2023-08-30 01:32:00,691 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4148 transitions. [2023-08-30 01:32:00,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4148 transitions. [2023-08-30 01:32:00,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:32:00,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4148 transitions. [2023-08-30 01:32:00,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 244.0) internal successors, (4148), 17 states have internal predecessors, (4148), 0 states have call successors, (0), 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 01:32:00,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 620.0) internal successors, (11160), 18 states have internal predecessors, (11160), 0 states have call successors, (0), 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 01:32:00,704 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 620.0) internal successors, (11160), 18 states have internal predecessors, (11160), 0 states have call successors, (0), 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 01:32:00,704 INFO L175 Difference]: Start difference. First operand has 117 places, 102 transitions, 901 flow. Second operand 17 states and 4148 transitions. [2023-08-30 01:32:00,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 225 transitions, 2071 flow [2023-08-30 01:32:01,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 225 transitions, 1893 flow, removed 74 selfloop flow, removed 3 redundant places. [2023-08-30 01:32:01,662 INFO L231 Difference]: Finished difference. Result has 139 places, 138 transitions, 1348 flow [2023-08-30 01:32:01,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1348, PETRI_PLACES=139, PETRI_TRANSITIONS=138} [2023-08-30 01:32:01,663 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 87 predicate places. [2023-08-30 01:32:01,663 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 138 transitions, 1348 flow [2023-08-30 01:32:01,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 238.1) internal successors, (2381), 10 states have internal predecessors, (2381), 0 states have call successors, (0), 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 01:32:01,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:32:01,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:32:01,673 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 (23)] Forceful destruction successful, exit code 0 [2023-08-30 01:32:01,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /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 01:32:01,865 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:32:01,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:32:01,865 INFO L85 PathProgramCache]: Analyzing trace with hash -241653667, now seen corresponding path program 3 times [2023-08-30 01:32:01,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:32:01,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976044388] [2023-08-30 01:32:01,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 01:32:01,866 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 01:32:01,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:32:01,867 INFO L229 MonitoredProcess]: Starting monitored process 24 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 01:32:01,867 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 (24)] Waiting until timeout for monitored process [2023-08-30 01:32:02,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 01:32:02,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:32:02,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 01:32:02,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:32:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:32:02,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:32:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:32:02,290 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:32:02,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976044388] [2023-08-30 01:32:02,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976044388] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:32:02,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:32:02,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 01:32:02,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833933803] [2023-08-30 01:32:02,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:32:02,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 01:32:02,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:32:02,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 01:32:02,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 01:32:03,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 620 [2023-08-30 01:32:03,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 138 transitions, 1348 flow. Second operand has 10 states, 10 states have (on average 240.3) internal successors, (2403), 10 states have internal predecessors, (2403), 0 states have call successors, (0), 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 01:32:03,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:32:03,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 620 [2023-08-30 01:32:03,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:32:07,651 INFO L130 PetriNetUnfolder]: 6863/12827 cut-off events. [2023-08-30 01:32:07,652 INFO L131 PetriNetUnfolder]: For 114941/114941 co-relation queries the response was YES. [2023-08-30 01:32:07,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70669 conditions, 12827 events. 6863/12827 cut-off events. For 114941/114941 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 95355 event pairs, 924 based on Foata normal form. 560/12747 useless extension candidates. Maximal degree in co-relation 70617. Up to 4081 conditions per place. [2023-08-30 01:32:07,754 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 137 selfloop transitions, 84 changer transitions 0/221 dead transitions. [2023-08-30 01:32:07,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 221 transitions, 2263 flow [2023-08-30 01:32:07,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 01:32:07,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 01:32:07,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3935 transitions. [2023-08-30 01:32:07,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3966733870967742 [2023-08-30 01:32:07,761 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3935 transitions. [2023-08-30 01:32:07,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3935 transitions. [2023-08-30 01:32:07,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:32:07,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3935 transitions. [2023-08-30 01:32:07,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 245.9375) internal successors, (3935), 16 states have internal predecessors, (3935), 0 states have call successors, (0), 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 01:32:07,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 620.0) internal successors, (10540), 17 states have internal predecessors, (10540), 0 states have call successors, (0), 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 01:32:07,775 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 620.0) internal successors, (10540), 17 states have internal predecessors, (10540), 0 states have call successors, (0), 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 01:32:07,776 INFO L175 Difference]: Start difference. First operand has 139 places, 138 transitions, 1348 flow. Second operand 16 states and 3935 transitions. [2023-08-30 01:32:07,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 221 transitions, 2263 flow [2023-08-30 01:32:09,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 221 transitions, 2069 flow, removed 71 selfloop flow, removed 4 redundant places. [2023-08-30 01:32:09,944 INFO L231 Difference]: Finished difference. Result has 153 places, 148 transitions, 1490 flow [2023-08-30 01:32:09,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1490, PETRI_PLACES=153, PETRI_TRANSITIONS=148} [2023-08-30 01:32:09,945 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 101 predicate places. [2023-08-30 01:32:09,945 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 148 transitions, 1490 flow [2023-08-30 01:32:09,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 240.3) internal successors, (2403), 10 states have internal predecessors, (2403), 0 states have call successors, (0), 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 01:32:09,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:32:09,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:32:09,954 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 (24)] Forceful destruction successful, exit code 0 [2023-08-30 01:32:10,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /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 01:32:10,146 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:32:10,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:32:10,146 INFO L85 PathProgramCache]: Analyzing trace with hash -392583389, now seen corresponding path program 4 times [2023-08-30 01:32:10,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:32:10,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320538511] [2023-08-30 01:32:10,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 01:32:10,147 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 01:32:10,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:32:10,148 INFO L229 MonitoredProcess]: Starting monitored process 25 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 01:32:10,148 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 (25)] Waiting until timeout for monitored process [2023-08-30 01:32:10,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 01:32:10,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:32:10,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 01:32:10,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:32:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:32:10,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:32:10,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 62 [2023-08-30 01:32:10,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 60 [2023-08-30 01:32:10,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:32:10,592 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:32:10,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320538511] [2023-08-30 01:32:10,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320538511] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:32:10,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:32:10,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 01:32:10,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109122337] [2023-08-30 01:32:10,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:32:10,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 01:32:10,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:32:10,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 01:32:10,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-08-30 01:32:11,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 620 [2023-08-30 01:32:11,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 148 transitions, 1490 flow. Second operand has 10 states, 10 states have (on average 237.1) internal successors, (2371), 10 states have internal predecessors, (2371), 0 states have call successors, (0), 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 01:32:11,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:32:11,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 620 [2023-08-30 01:32:11,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:32:15,804 INFO L130 PetriNetUnfolder]: 7583/14347 cut-off events. [2023-08-30 01:32:15,805 INFO L131 PetriNetUnfolder]: For 106111/106111 co-relation queries the response was YES. [2023-08-30 01:32:15,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80432 conditions, 14347 events. 7583/14347 cut-off events. For 106111/106111 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 110784 event pairs, 2080 based on Foata normal form. 280/13747 useless extension candidates. Maximal degree in co-relation 80377. Up to 7968 conditions per place. [2023-08-30 01:32:15,912 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 151 selfloop transitions, 59 changer transitions 0/210 dead transitions. [2023-08-30 01:32:15,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 210 transitions, 2267 flow [2023-08-30 01:32:15,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 01:32:15,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 01:32:15,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3381 transitions. [2023-08-30 01:32:15,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3895161290322581 [2023-08-30 01:32:15,918 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3381 transitions. [2023-08-30 01:32:15,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3381 transitions. [2023-08-30 01:32:15,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:32:15,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3381 transitions. [2023-08-30 01:32:15,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 241.5) internal successors, (3381), 14 states have internal predecessors, (3381), 0 states have call successors, (0), 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 01:32:15,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 620.0) internal successors, (9300), 15 states have internal predecessors, (9300), 0 states have call successors, (0), 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 01:32:15,928 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 620.0) internal successors, (9300), 15 states have internal predecessors, (9300), 0 states have call successors, (0), 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 01:32:15,929 INFO L175 Difference]: Start difference. First operand has 153 places, 148 transitions, 1490 flow. Second operand 14 states and 3381 transitions. [2023-08-30 01:32:15,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 210 transitions, 2267 flow [2023-08-30 01:32:17,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 210 transitions, 2072 flow, removed 41 selfloop flow, removed 8 redundant places. [2023-08-30 01:32:17,885 INFO L231 Difference]: Finished difference. Result has 165 places, 164 transitions, 1661 flow [2023-08-30 01:32:17,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=1333, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1661, PETRI_PLACES=165, PETRI_TRANSITIONS=164} [2023-08-30 01:32:17,886 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 113 predicate places. [2023-08-30 01:32:17,886 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 164 transitions, 1661 flow [2023-08-30 01:32:17,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 237.1) internal successors, (2371), 10 states have internal predecessors, (2371), 0 states have call successors, (0), 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 01:32:17,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:32:17,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:32:17,896 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 (25)] Forceful destruction successful, exit code 0 [2023-08-30 01:32:18,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /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 01:32:18,088 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:32:18,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:32:18,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1872588002, now seen corresponding path program 1 times [2023-08-30 01:32:18,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:32:18,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398472789] [2023-08-30 01:32:18,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:32:18,089 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 01:32:18,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:32:18,090 INFO L229 MonitoredProcess]: Starting monitored process 26 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 01:32:18,091 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 (26)] Waiting until timeout for monitored process [2023-08-30 01:32:18,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:32:18,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 01:32:18,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:32:18,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:32:18,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:32:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:32:18,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:32:18,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398472789] [2023-08-30 01:32:18,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398472789] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:32:18,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:32:18,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 01:32:18,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572902858] [2023-08-30 01:32:18,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:32:18,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 01:32:18,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:32:18,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 01:32:18,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-08-30 01:32:19,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 620 [2023-08-30 01:32:19,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 164 transitions, 1661 flow. Second operand has 10 states, 10 states have (on average 239.3) internal successors, (2393), 10 states have internal predecessors, (2393), 0 states have call successors, (0), 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 01:32:19,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:32:19,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 620 [2023-08-30 01:32:19,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:32:26,330 INFO L130 PetriNetUnfolder]: 8843/16487 cut-off events. [2023-08-30 01:32:26,330 INFO L131 PetriNetUnfolder]: For 112422/112422 co-relation queries the response was YES. [2023-08-30 01:32:26,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94759 conditions, 16487 events. 8843/16487 cut-off events. For 112422/112422 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 128760 event pairs, 2104 based on Foata normal form. 80/15487 useless extension candidates. Maximal degree in co-relation 94697. Up to 8348 conditions per place. [2023-08-30 01:32:26,449 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 159 selfloop transitions, 88 changer transitions 0/247 dead transitions. [2023-08-30 01:32:26,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 247 transitions, 2700 flow [2023-08-30 01:32:26,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 01:32:26,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 01:32:26,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3907 transitions. [2023-08-30 01:32:26,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3938508064516129 [2023-08-30 01:32:26,454 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3907 transitions. [2023-08-30 01:32:26,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3907 transitions. [2023-08-30 01:32:26,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:32:26,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3907 transitions. [2023-08-30 01:32:26,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 244.1875) internal successors, (3907), 16 states have internal predecessors, (3907), 0 states have call successors, (0), 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 01:32:26,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 620.0) internal successors, (10540), 17 states have internal predecessors, (10540), 0 states have call successors, (0), 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 01:32:26,465 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 620.0) internal successors, (10540), 17 states have internal predecessors, (10540), 0 states have call successors, (0), 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 01:32:26,465 INFO L175 Difference]: Start difference. First operand has 165 places, 164 transitions, 1661 flow. Second operand 16 states and 3907 transitions. [2023-08-30 01:32:26,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 247 transitions, 2700 flow [2023-08-30 01:32:28,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 247 transitions, 2610 flow, removed 26 selfloop flow, removed 3 redundant places. [2023-08-30 01:32:28,783 INFO L231 Difference]: Finished difference. Result has 177 places, 194 transitions, 2166 flow [2023-08-30 01:32:28,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=1593, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2166, PETRI_PLACES=177, PETRI_TRANSITIONS=194} [2023-08-30 01:32:28,784 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 125 predicate places. [2023-08-30 01:32:28,784 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 194 transitions, 2166 flow [2023-08-30 01:32:28,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 239.3) internal successors, (2393), 10 states have internal predecessors, (2393), 0 states have call successors, (0), 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 01:32:28,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:32:28,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:32:28,793 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 (26)] Ended with exit code 0 [2023-08-30 01:32:28,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /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 01:32:28,985 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:32:28,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:32:28,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1675259756, now seen corresponding path program 2 times [2023-08-30 01:32:28,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:32:28,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091217107] [2023-08-30 01:32:28,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:32:28,986 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 01:32:28,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:32:28,987 INFO L229 MonitoredProcess]: Starting monitored process 27 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 01:32:28,989 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 (27)] Waiting until timeout for monitored process [2023-08-30 01:32:29,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:32:29,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:32:29,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 01:32:29,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:32:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:32:29,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:32:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:32:29,351 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:32:29,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091217107] [2023-08-30 01:32:29,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091217107] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:32:29,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:32:29,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 01:32:29,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54403640] [2023-08-30 01:32:29,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:32:29,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 01:32:29,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:32:29,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 01:32:29,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-30 01:32:29,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 620 [2023-08-30 01:32:29,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 194 transitions, 2166 flow. Second operand has 10 states, 10 states have (on average 239.3) internal successors, (2393), 10 states have internal predecessors, (2393), 0 states have call successors, (0), 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 01:32:29,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:32:29,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 620 [2023-08-30 01:32:29,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:32:36,029 INFO L130 PetriNetUnfolder]: 9023/16867 cut-off events. [2023-08-30 01:32:36,029 INFO L131 PetriNetUnfolder]: For 117011/117011 co-relation queries the response was YES. [2023-08-30 01:32:36,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101280 conditions, 16867 events. 9023/16867 cut-off events. For 117011/117011 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 132740 event pairs, 2180 based on Foata normal form. 80/15907 useless extension candidates. Maximal degree in co-relation 101217. Up to 8348 conditions per place. [2023-08-30 01:32:36,157 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 172 selfloop transitions, 73 changer transitions 0/245 dead transitions. [2023-08-30 01:32:36,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 245 transitions, 2872 flow [2023-08-30 01:32:36,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 01:32:36,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 01:32:36,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3413 transitions. [2023-08-30 01:32:36,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39320276497695855 [2023-08-30 01:32:36,161 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3413 transitions. [2023-08-30 01:32:36,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3413 transitions. [2023-08-30 01:32:36,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:32:36,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3413 transitions. [2023-08-30 01:32:36,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 243.78571428571428) internal successors, (3413), 14 states have internal predecessors, (3413), 0 states have call successors, (0), 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 01:32:36,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 620.0) internal successors, (9300), 15 states have internal predecessors, (9300), 0 states have call successors, (0), 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 01:32:36,170 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 620.0) internal successors, (9300), 15 states have internal predecessors, (9300), 0 states have call successors, (0), 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 01:32:36,170 INFO L175 Difference]: Start difference. First operand has 177 places, 194 transitions, 2166 flow. Second operand 14 states and 3413 transitions. [2023-08-30 01:32:36,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 245 transitions, 2872 flow [2023-08-30 01:32:40,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 245 transitions, 2548 flow, removed 146 selfloop flow, removed 5 redundant places. [2023-08-30 01:32:40,810 INFO L231 Difference]: Finished difference. Result has 189 places, 200 transitions, 2130 flow [2023-08-30 01:32:40,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=1906, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2130, PETRI_PLACES=189, PETRI_TRANSITIONS=200} [2023-08-30 01:32:40,811 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 137 predicate places. [2023-08-30 01:32:40,811 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 200 transitions, 2130 flow [2023-08-30 01:32:40,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 239.3) internal successors, (2393), 10 states have internal predecessors, (2393), 0 states have call successors, (0), 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 01:32:40,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:32:40,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:32:40,820 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 (27)] Ended with exit code 0 [2023-08-30 01:32:41,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /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 01:32:41,012 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:32:41,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:32:41,013 INFO L85 PathProgramCache]: Analyzing trace with hash 517864581, now seen corresponding path program 5 times [2023-08-30 01:32:41,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:32:41,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [390539992] [2023-08-30 01:32:41,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 01:32:41,013 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 01:32:41,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:32:41,014 INFO L229 MonitoredProcess]: Starting monitored process 28 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 01:32:41,015 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 (28)] Waiting until timeout for monitored process [2023-08-30 01:32:41,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:32:41,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:32:41,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 01:32:41,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:32:41,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:32:41,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:32:41,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 62 [2023-08-30 01:32:41,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 60 [2023-08-30 01:32:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:32:41,269 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:32:41,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [390539992] [2023-08-30 01:32:41,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [390539992] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:32:41,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:32:41,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 01:32:41,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225272941] [2023-08-30 01:32:41,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:32:41,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 01:32:41,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:32:41,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 01:32:41,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 01:32:41,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 620 [2023-08-30 01:32:41,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 200 transitions, 2130 flow. Second operand has 10 states, 10 states have (on average 238.1) internal successors, (2381), 10 states have internal predecessors, (2381), 0 states have call successors, (0), 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 01:32:41,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:32:41,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 620 [2023-08-30 01:32:41,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:32:47,120 INFO L130 PetriNetUnfolder]: 11103/20827 cut-off events. [2023-08-30 01:32:47,120 INFO L131 PetriNetUnfolder]: For 116291/116291 co-relation queries the response was YES. [2023-08-30 01:32:47,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110883 conditions, 20827 events. 11103/20827 cut-off events. For 116291/116291 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 170061 event pairs, 1940 based on Foata normal form. 200/19587 useless extension candidates. Maximal degree in co-relation 110817. Up to 9268 conditions per place. [2023-08-30 01:32:47,277 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 200 selfloop transitions, 78 changer transitions 0/278 dead transitions. [2023-08-30 01:32:47,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 278 transitions, 3353 flow [2023-08-30 01:32:47,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 01:32:47,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 01:32:47,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2899 transitions. [2023-08-30 01:32:47,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896505376344086 [2023-08-30 01:32:47,281 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2899 transitions. [2023-08-30 01:32:47,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2899 transitions. [2023-08-30 01:32:47,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:32:47,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2899 transitions. [2023-08-30 01:32:47,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 241.58333333333334) internal successors, (2899), 12 states have internal predecessors, (2899), 0 states have call successors, (0), 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 01:32:47,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 620.0) internal successors, (8060), 13 states have internal predecessors, (8060), 0 states have call successors, (0), 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 01:32:47,290 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 620.0) internal successors, (8060), 13 states have internal predecessors, (8060), 0 states have call successors, (0), 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 01:32:47,290 INFO L175 Difference]: Start difference. First operand has 189 places, 200 transitions, 2130 flow. Second operand 12 states and 2899 transitions. [2023-08-30 01:32:47,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 278 transitions, 3353 flow [2023-08-30 01:32:49,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 278 transitions, 3308 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-30 01:32:49,461 INFO L231 Difference]: Finished difference. Result has 203 places, 217 transitions, 2533 flow [2023-08-30 01:32:49,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=2094, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2533, PETRI_PLACES=203, PETRI_TRANSITIONS=217} [2023-08-30 01:32:49,462 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 151 predicate places. [2023-08-30 01:32:49,462 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 217 transitions, 2533 flow [2023-08-30 01:32:49,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 238.1) internal successors, (2381), 10 states have internal predecessors, (2381), 0 states have call successors, (0), 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 01:32:49,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:32:49,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:32:49,471 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 (28)] Ended with exit code 0 [2023-08-30 01:32:49,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /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 01:32:49,663 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:32:49,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:32:49,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1568471229, now seen corresponding path program 6 times [2023-08-30 01:32:49,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:32:49,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136479302] [2023-08-30 01:32:49,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 01:32:49,664 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 01:32:49,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:32:49,665 INFO L229 MonitoredProcess]: Starting monitored process 29 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 01:32:49,666 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 (29)] Waiting until timeout for monitored process [2023-08-30 01:32:49,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 01:32:49,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:32:49,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 01:32:49,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:32:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:32:49,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:32:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:32:50,061 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:32:50,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136479302] [2023-08-30 01:32:50,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136479302] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:32:50,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:32:50,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 01:32:50,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215034758] [2023-08-30 01:32:50,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:32:50,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 01:32:50,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:32:50,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 01:32:50,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-08-30 01:32:50,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 620 [2023-08-30 01:32:50,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 217 transitions, 2533 flow. Second operand has 10 states, 10 states have (on average 238.3) internal successors, (2383), 10 states have internal predecessors, (2383), 0 states have call successors, (0), 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 01:32:50,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:32:50,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 620 [2023-08-30 01:32:50,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:32:59,095 INFO L130 PetriNetUnfolder]: 11943/22947 cut-off events. [2023-08-30 01:32:59,095 INFO L131 PetriNetUnfolder]: For 180483/180483 co-relation queries the response was YES. [2023-08-30 01:32:59,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133290 conditions, 22947 events. 11943/22947 cut-off events. For 180483/180483 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 194401 event pairs, 2520 based on Foata normal form. 720/22867 useless extension candidates. Maximal degree in co-relation 133217. Up to 12688 conditions per place. [2023-08-30 01:32:59,266 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 194 selfloop transitions, 121 changer transitions 0/315 dead transitions. [2023-08-30 01:32:59,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 315 transitions, 4037 flow [2023-08-30 01:32:59,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 01:32:59,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 01:32:59,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3879 transitions. [2023-08-30 01:32:59,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39102822580645163 [2023-08-30 01:32:59,271 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3879 transitions. [2023-08-30 01:32:59,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3879 transitions. [2023-08-30 01:32:59,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:32:59,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3879 transitions. [2023-08-30 01:32:59,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 242.4375) internal successors, (3879), 16 states have internal predecessors, (3879), 0 states have call successors, (0), 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 01:32:59,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 620.0) internal successors, (10540), 17 states have internal predecessors, (10540), 0 states have call successors, (0), 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 01:32:59,281 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 620.0) internal successors, (10540), 17 states have internal predecessors, (10540), 0 states have call successors, (0), 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 01:32:59,281 INFO L175 Difference]: Start difference. First operand has 203 places, 217 transitions, 2533 flow. Second operand 16 states and 3879 transitions. [2023-08-30 01:32:59,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 315 transitions, 4037 flow [2023-08-30 01:33:02,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 315 transitions, 3848 flow, removed 47 selfloop flow, removed 4 redundant places. [2023-08-30 01:33:02,817 INFO L231 Difference]: Finished difference. Result has 218 places, 262 transitions, 3388 flow [2023-08-30 01:33:02,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=2396, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3388, PETRI_PLACES=218, PETRI_TRANSITIONS=262} [2023-08-30 01:33:02,818 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 166 predicate places. [2023-08-30 01:33:02,818 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 262 transitions, 3388 flow [2023-08-30 01:33:02,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 238.3) internal successors, (2383), 10 states have internal predecessors, (2383), 0 states have call successors, (0), 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 01:33:02,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:33:02,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:33:02,828 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 (29)] Ended with exit code 0 [2023-08-30 01:33:03,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /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 01:33:03,023 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:33:03,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:33:03,023 INFO L85 PathProgramCache]: Analyzing trace with hash -755408778, now seen corresponding path program 3 times [2023-08-30 01:33:03,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:33:03,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1736416008] [2023-08-30 01:33:03,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 01:33:03,024 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 01:33:03,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:33:03,025 INFO L229 MonitoredProcess]: Starting monitored process 30 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 01:33:03,025 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 (30)] Waiting until timeout for monitored process [2023-08-30 01:33:03,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 01:33:03,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:33:03,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 01:33:03,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:33:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:33:03,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:33:03,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 62 [2023-08-30 01:33:03,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 60 [2023-08-30 01:33:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:33:03,370 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:33:03,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1736416008] [2023-08-30 01:33:03,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1736416008] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:33:03,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:33:03,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 01:33:03,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251289302] [2023-08-30 01:33:03,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:33:03,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 01:33:03,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:33:03,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 01:33:03,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 01:33:04,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 620 [2023-08-30 01:33:04,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 262 transitions, 3388 flow. Second operand has 10 states, 10 states have (on average 237.1) internal successors, (2371), 10 states have internal predecessors, (2371), 0 states have call successors, (0), 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 01:33:04,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:33:04,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 620 [2023-08-30 01:33:04,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:33:13,786 INFO L130 PetriNetUnfolder]: 16123/29287 cut-off events. [2023-08-30 01:33:13,786 INFO L131 PetriNetUnfolder]: For 220351/220351 co-relation queries the response was YES. [2023-08-30 01:33:14,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181614 conditions, 29287 events. 16123/29287 cut-off events. For 220351/220351 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 243368 event pairs, 1520 based on Foata normal form. 200/27167 useless extension candidates. Maximal degree in co-relation 181537. Up to 9460 conditions per place. [2023-08-30 01:33:14,227 INFO L137 encePairwiseOnDemand]: 614/620 looper letters, 219 selfloop transitions, 156 changer transitions 0/375 dead transitions. [2023-08-30 01:33:14,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 375 transitions, 5288 flow [2023-08-30 01:33:14,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 01:33:14,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 01:33:14,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3390 transitions. [2023-08-30 01:33:14,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39055299539170507 [2023-08-30 01:33:14,231 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3390 transitions. [2023-08-30 01:33:14,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3390 transitions. [2023-08-30 01:33:14,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:33:14,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3390 transitions. [2023-08-30 01:33:14,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 242.14285714285714) internal successors, (3390), 14 states have internal predecessors, (3390), 0 states have call successors, (0), 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 01:33:14,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 620.0) internal successors, (9300), 15 states have internal predecessors, (9300), 0 states have call successors, (0), 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 01:33:14,240 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 620.0) internal successors, (9300), 15 states have internal predecessors, (9300), 0 states have call successors, (0), 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 01:33:14,240 INFO L175 Difference]: Start difference. First operand has 218 places, 262 transitions, 3388 flow. Second operand 14 states and 3390 transitions. [2023-08-30 01:33:14,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 375 transitions, 5288 flow [2023-08-30 01:33:23,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 375 transitions, 4917 flow, removed 159 selfloop flow, removed 4 redundant places. [2023-08-30 01:33:23,039 INFO L231 Difference]: Finished difference. Result has 231 places, 308 transitions, 4060 flow [2023-08-30 01:33:23,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=3049, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4060, PETRI_PLACES=231, PETRI_TRANSITIONS=308} [2023-08-30 01:33:23,040 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 179 predicate places. [2023-08-30 01:33:23,040 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 308 transitions, 4060 flow [2023-08-30 01:33:23,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 237.1) internal successors, (2371), 10 states have internal predecessors, (2371), 0 states have call successors, (0), 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 01:33:23,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:33:23,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:33:23,050 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 (30)] Ended with exit code 0 [2023-08-30 01:33:23,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /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 01:33:23,242 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-08-30 01:33:23,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:33:23,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1933700115, now seen corresponding path program 7 times [2023-08-30 01:33:23,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:33:23,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1097162849] [2023-08-30 01:33:23,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 01:33:23,243 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 01:33:23,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:33:23,245 INFO L229 MonitoredProcess]: Starting monitored process 31 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 01:33:23,245 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 (31)] Waiting until timeout for monitored process [2023-08-30 01:33:23,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:33:23,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 01:33:23,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:33:23,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 552 treesize of output 544 [2023-08-30 01:33:23,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 544 treesize of output 536 [2023-08-30 01:34:11,221 WARN L222 SmtUtils]: Spent 12.19s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:34:12,396 INFO L321 Elim1Store]: treesize reduction 972, result has 1.3 percent of original size [2023-08-30 01:34:12,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 28 new quantified variables, introduced 120 case distinctions, treesize of input 5692 treesize of output 274 [2023-08-30 01:34:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:34:14,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:34:24,786 WARN L222 SmtUtils]: Spent 5.71s on a formula simplification. DAG size of input: 600 DAG size of output: 162 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-08-30 01:34:24,787 INFO L321 Elim1Store]: treesize reduction 1680, result has 22.3 percent of original size [2023-08-30 01:34:24,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 0 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 190 case distinctions, treesize of input 683 treesize of output 988 [2023-08-30 01:34:24,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 499 treesize of output 491 [2023-08-30 01:34:24,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 491 treesize of output 483 [2023-08-30 01:38:29,643 WARN L222 SmtUtils]: Spent 5.04s on a formula simplification. DAG size of input: 930 DAG size of output: 987 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15