./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-word-trans.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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/chl-word-trans.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 73462fb8dbdc39f07edabdd79150cbad579fbba379eb033cd2e89802bbb8b9a6 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 01:56:22,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:56:22,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:56:22,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:56:22,667 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:56:22,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:56:22,672 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:56:22,674 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:56:22,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:56:22,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:56:22,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:56:22,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:56:22,684 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:56:22,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:56:22,687 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:56:22,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:56:22,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:56:22,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:56:22,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:56:22,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:56:22,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:56:22,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:56:22,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:56:22,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:56:22,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:56:22,711 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:56:22,711 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:56:22,713 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:56:22,714 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:56:22,714 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:56:22,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:56:22,720 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:56:22,722 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:56:22,723 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:56:22,724 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:56:22,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:56:22,725 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:56:22,725 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:56:22,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:56:22,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:56:22,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:56:22,728 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 01:56:22,760 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:56:22,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:56:22,761 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:56:22,761 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:56:22,762 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:56:22,762 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:56:22,763 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:56:22,763 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:56:22,763 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:56:22,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:56:22,764 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:56:22,765 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:56:22,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:56:22,765 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:56:22,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:56:22,765 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:56:22,766 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:56:22,766 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:56:22,766 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:56:22,766 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:56:22,766 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:56:22,767 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:56:22,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:56:22,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:56:22,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:56:22,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:56:22,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:56:22,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:56:22,768 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 01:56:22,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 01:56:22,769 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:56:22,769 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:56:22,769 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:56:22,769 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:56:22,770 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73462fb8dbdc39f07edabdd79150cbad579fbba379eb033cd2e89802bbb8b9a6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:56:23,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:56:23,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:56:23,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:56:23,134 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:56:23,134 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:56:23,135 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-word-trans.wvr.c [2023-09-01 01:56:24,381 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:56:24,589 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:56:24,590 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-trans.wvr.c [2023-09-01 01:56:24,596 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/303817ebb/b9fd750d7a704c5483013fdee0c6eb31/FLAG355f85c37 [2023-09-01 01:56:24,606 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/303817ebb/b9fd750d7a704c5483013fdee0c6eb31 [2023-09-01 01:56:24,608 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:56:24,609 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:56:24,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:56:24,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:56:24,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:56:24,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:56:24" (1/1) ... [2023-09-01 01:56:24,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b212335 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:56:24, skipping insertion in model container [2023-09-01 01:56:24,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:56:24" (1/1) ... [2023-09-01 01:56:24,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:56:24,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:56:24,772 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/chl-word-trans.wvr.c[3292,3305] [2023-09-01 01:56:24,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:56:24,789 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) [2023-09-01 01:56:24,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2c85f046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:56:24, skipping insertion in model container [2023-09-01 01:56:24,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:56:24,790 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 01:56:24,792 INFO L158 Benchmark]: Toolchain (without parser) took 181.97ms. Allocated memory is still 65.0MB. Free memory was 42.1MB in the beginning and 31.9MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 01:56:24,792 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 65.0MB. Free memory is still 42.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 01:56:24,793 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.33ms. Allocated memory is still 65.0MB. Free memory was 41.9MB in the beginning and 31.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 01:56:24,794 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 65.0MB. Free memory is still 42.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 180.33ms. Allocated memory is still 65.0MB. Free memory was 41.9MB in the beginning and 31.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 137]: 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/chl-word-trans.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 73462fb8dbdc39f07edabdd79150cbad579fbba379eb033cd2e89802bbb8b9a6 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 01:56:26,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:56:26,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:56:26,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:56:26,485 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:56:26,489 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:56:26,491 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:56:26,493 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:56:26,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:56:26,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:56:26,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:56:26,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:56:26,504 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:56:26,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:56:26,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:56:26,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:56:26,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:56:26,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:56:26,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:56:26,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:56:26,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:56:26,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:56:26,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:56:26,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:56:26,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:56:26,543 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:56:26,543 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:56:26,545 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:56:26,546 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:56:26,546 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:56:26,547 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:56:26,552 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:56:26,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:56:26,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:56:26,555 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:56:26,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:56:26,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:56:26,557 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:56:26,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:56:26,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:56:26,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:56:26,560 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 01:56:26,587 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:56:26,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:56:26,589 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:56:26,589 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:56:26,590 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:56:26,590 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:56:26,591 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:56:26,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:56:26,591 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:56:26,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:56:26,592 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:56:26,592 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:56:26,592 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:56:26,593 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:56:26,593 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:56:26,593 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:56:26,593 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:56:26,593 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:56:26,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:56:26,594 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:56:26,594 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 01:56:26,594 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 01:56:26,594 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:56:26,595 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:56:26,595 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:56:26,595 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:56:26,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:56:26,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:56:26,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:56:26,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:56:26,596 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 01:56:26,596 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 01:56:26,597 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:56:26,597 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:56:26,597 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:56:26,597 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 01:56:26,597 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:56:26,597 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73462fb8dbdc39f07edabdd79150cbad579fbba379eb033cd2e89802bbb8b9a6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:56:26,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:56:26,941 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:56:26,944 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:56:26,945 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:56:26,945 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:56:26,946 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-word-trans.wvr.c [2023-09-01 01:56:28,036 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:56:28,240 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:56:28,241 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-trans.wvr.c [2023-09-01 01:56:28,246 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89a2696fb/ec6cf43678cd431f86d188041dbc1590/FLAGce55dd2a6 [2023-09-01 01:56:28,257 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89a2696fb/ec6cf43678cd431f86d188041dbc1590 [2023-09-01 01:56:28,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:56:28,260 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:56:28,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:56:28,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:56:28,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:56:28,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:56:28" (1/1) ... [2023-09-01 01:56:28,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7646097c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:56:28, skipping insertion in model container [2023-09-01 01:56:28,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:56:28" (1/1) ... [2023-09-01 01:56:28,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:56:28,292 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:56:28,445 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/chl-word-trans.wvr.c[3292,3305] [2023-09-01 01:56:28,463 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:56:28,483 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 01:56:28,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:56:28,522 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/chl-word-trans.wvr.c[3292,3305] [2023-09-01 01:56:28,534 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:56:28,542 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 01:56:28,578 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/chl-word-trans.wvr.c[3292,3305] [2023-09-01 01:56:28,589 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:56:28,607 INFO L208 MainTranslator]: Completed translation [2023-09-01 01:56:28,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:56:28 WrapperNode [2023-09-01 01:56:28,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:56:28,609 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 01:56:28,610 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 01:56:28,610 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 01:56:28,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:56:28" (1/1) ... [2023-09-01 01:56:28,641 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:56:28" (1/1) ... [2023-09-01 01:56:28,672 INFO L138 Inliner]: procedures = 27, calls = 44, calls flagged for inlining = 8, calls inlined = 12, statements flattened = 172 [2023-09-01 01:56:28,673 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 01:56:28,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 01:56:28,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 01:56:28,674 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 01:56:28,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:56:28" (1/1) ... [2023-09-01 01:56:28,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:56:28" (1/1) ... [2023-09-01 01:56:28,688 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:56:28" (1/1) ... [2023-09-01 01:56:28,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:56:28" (1/1) ... [2023-09-01 01:56:28,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:56:28" (1/1) ... [2023-09-01 01:56:28,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:56:28" (1/1) ... [2023-09-01 01:56:28,704 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:56:28" (1/1) ... [2023-09-01 01:56:28,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:56:28" (1/1) ... [2023-09-01 01:56:28,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 01:56:28,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 01:56:28,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 01:56:28,710 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 01:56:28,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:56:28" (1/1) ... [2023-09-01 01:56:28,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:56:28,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:56:28,746 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) [2023-09-01 01:56:28,769 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 [2023-09-01 01:56:28,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 01:56:28,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 01:56:28,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 01:56:28,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 01:56:28,784 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 01:56:28,784 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 01:56:28,784 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 01:56:28,784 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 01:56:28,784 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 01:56:28,784 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 01:56:28,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 01:56:28,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 01:56:28,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 01:56:28,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 01:56:28,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 01:56:28,787 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 01:56:28,908 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 01:56:28,910 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 01:56:29,640 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 01:56:29,650 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 01:56:29,650 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 01:56:29,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:56:29 BoogieIcfgContainer [2023-09-01 01:56:29,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 01:56:29,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 01:56:29,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 01:56:29,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 01:56:29,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:56:28" (1/3) ... [2023-09-01 01:56:29,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ba06a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:56:29, skipping insertion in model container [2023-09-01 01:56:29,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:56:28" (2/3) ... [2023-09-01 01:56:29,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ba06a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:56:29, skipping insertion in model container [2023-09-01 01:56:29,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:56:29" (3/3) ... [2023-09-01 01:56:29,659 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-trans.wvr.c [2023-09-01 01:56:29,674 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 01:56:29,674 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-09-01 01:56:29,675 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 01:56:29,790 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 01:56:29,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 310 places, 328 transitions, 680 flow [2023-09-01 01:56:29,953 INFO L130 PetriNetUnfolder]: 28/325 cut-off events. [2023-09-01 01:56:29,957 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 01:56:29,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 325 events. 28/325 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 625 event pairs, 0 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 252. Up to 3 conditions per place. [2023-09-01 01:56:29,966 INFO L82 GeneralOperation]: Start removeDead. Operand has 310 places, 328 transitions, 680 flow [2023-09-01 01:56:29,976 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 303 places, 321 transitions, 660 flow [2023-09-01 01:56:29,979 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 01:56:29,987 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 303 places, 321 transitions, 660 flow [2023-09-01 01:56:29,989 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 303 places, 321 transitions, 660 flow [2023-09-01 01:56:29,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 303 places, 321 transitions, 660 flow [2023-09-01 01:56:30,074 INFO L130 PetriNetUnfolder]: 28/321 cut-off events. [2023-09-01 01:56:30,075 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 01:56:30,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 321 events. 28/321 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 622 event pairs, 0 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 252. Up to 3 conditions per place. [2023-09-01 01:56:30,087 INFO L119 LiptonReduction]: Number of co-enabled transitions 12768 [2023-09-01 01:57:01,292 INFO L134 LiptonReduction]: Checked pairs total: 25151 [2023-09-01 01:57:01,293 INFO L136 LiptonReduction]: Total number of compositions: 359 [2023-09-01 01:57:01,305 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 01:57:01,310 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;@9fdf0f2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 01:57:01,310 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2023-09-01 01:57:01,315 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 01:57:01,315 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 01:57:01,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:57:01,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:57:01,316 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:57:01,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:57:01,321 INFO L85 PathProgramCache]: Analyzing trace with hash 40810, now seen corresponding path program 1 times [2023-09-01 01:57:01,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:57:01,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330853782] [2023-09-01 01:57:01,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:57:01,338 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 [2023-09-01 01:57:01,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:57:01,345 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) [2023-09-01 01:57:01,346 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 [2023-09-01 01:57:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:57:01,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 01:57:01,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:57:01,590 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:57:01,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 01:57:01,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:01,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:57:01,620 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:57:01,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330853782] [2023-09-01 01:57:01,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1330853782] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:57:01,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:57:01,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:57:01,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861080367] [2023-09-01 01:57:01,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:57:01,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:57:01,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:57:01,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:57:01,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:57:01,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 687 [2023-09-01 01:57:01,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:57:01,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:57:01,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 687 [2023-09-01 01:57:01,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:57:05,233 INFO L130 PetriNetUnfolder]: 20232/26991 cut-off events. [2023-09-01 01:57:05,233 INFO L131 PetriNetUnfolder]: For 455/455 co-relation queries the response was YES. [2023-09-01 01:57:05,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54515 conditions, 26991 events. 20232/26991 cut-off events. For 455/455 co-relation queries the response was YES. Maximal size of possible extension queue 1464. Compared 142694 event pairs, 15757 based on Foata normal form. 0/8337 useless extension candidates. Maximal degree in co-relation 51676. Up to 26991 conditions per place. [2023-09-01 01:57:05,413 INFO L137 encePairwiseOnDemand]: 678/687 looper letters, 73 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-09-01 01:57:05,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 74 transitions, 314 flow [2023-09-01 01:57:05,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:57:05,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:57:05,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 961 transitions. [2023-09-01 01:57:05,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46627850557981565 [2023-09-01 01:57:05,434 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 961 transitions. [2023-09-01 01:57:05,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 961 transitions. [2023-09-01 01:57:05,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:57:05,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 961 transitions. [2023-09-01 01:57:05,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 320.3333333333333) internal successors, (961), 3 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:57:05,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:57:05,461 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:57:05,463 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 182 flow. Second operand 3 states and 961 transitions. [2023-09-01 01:57:05,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 74 transitions, 314 flow [2023-09-01 01:57:05,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 74 transitions, 302 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 01:57:05,477 INFO L231 Difference]: Finished difference. Result has 69 places, 74 transitions, 156 flow [2023-09-01 01:57:05,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=69, PETRI_TRANSITIONS=74} [2023-09-01 01:57:05,482 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -12 predicate places. [2023-09-01 01:57:05,483 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 74 transitions, 156 flow [2023-09-01 01:57:05,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:57:05,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:57:05,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:57:05,507 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 [2023-09-01 01:57:05,698 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 [2023-09-01 01:57:05,699 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:57:05,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:57:05,699 INFO L85 PathProgramCache]: Analyzing trace with hash 40812, now seen corresponding path program 1 times [2023-09-01 01:57:05,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:57:05,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064835967] [2023-09-01 01:57:05,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:57:05,700 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 [2023-09-01 01:57:05,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:57:05,706 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) [2023-09-01 01:57:05,707 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 [2023-09-01 01:57:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:57:05,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:57:05,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:57:05,906 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 01:57:05,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 01:57:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:05,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:57:05,943 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:57:05,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1064835967] [2023-09-01 01:57:05,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1064835967] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:57:05,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:57:05,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:57:05,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055569536] [2023-09-01 01:57:05,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:57:05,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:57:05,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:57:05,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:57:05,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:57:06,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 687 [2023-09-01 01:57:06,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 74 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:57:06,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:57:06,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 687 [2023-09-01 01:57:06,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:57:10,648 INFO L130 PetriNetUnfolder]: 40463/53978 cut-off events. [2023-09-01 01:57:10,648 INFO L131 PetriNetUnfolder]: For 148/148 co-relation queries the response was YES. [2023-09-01 01:57:10,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108382 conditions, 53978 events. 40463/53978 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 2748. Compared 310311 event pairs, 31514 based on Foata normal form. 0/16673 useless extension candidates. Maximal degree in co-relation 108376. Up to 26992 conditions per place. [2023-09-01 01:57:10,894 INFO L137 encePairwiseOnDemand]: 678/687 looper letters, 138 selfloop transitions, 6 changer transitions 0/144 dead transitions. [2023-09-01 01:57:10,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 144 transitions, 590 flow [2023-09-01 01:57:10,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:57:10,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:57:10,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1026 transitions. [2023-09-01 01:57:10,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4978165938864629 [2023-09-01 01:57:10,900 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1026 transitions. [2023-09-01 01:57:10,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1026 transitions. [2023-09-01 01:57:10,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:57:10,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1026 transitions. [2023-09-01 01:57:10,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 342.0) internal successors, (1026), 3 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:57:10,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:57:10,912 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:57:10,913 INFO L175 Difference]: Start difference. First operand has 69 places, 74 transitions, 156 flow. Second operand 3 states and 1026 transitions. [2023-09-01 01:57:10,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 144 transitions, 590 flow [2023-09-01 01:57:10,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 144 transitions, 589 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:57:10,917 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 205 flow [2023-09-01 01:57:10,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2023-09-01 01:57:10,918 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -9 predicate places. [2023-09-01 01:57:10,919 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 205 flow [2023-09-01 01:57:10,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:57:10,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:57:10,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:57:10,934 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 [2023-09-01 01:57:11,129 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 [2023-09-01 01:57:11,130 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:57:11,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:57:11,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1269838, now seen corresponding path program 1 times [2023-09-01 01:57:11,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:57:11,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859500884] [2023-09-01 01:57:11,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:57:11,132 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 [2023-09-01 01:57:11,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:57:11,134 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) [2023-09-01 01:57:11,137 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 [2023-09-01 01:57:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:57:11,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:57:11,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:57:11,311 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 01:57:11,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 01:57:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:11,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:57:11,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:11,550 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:57:11,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859500884] [2023-09-01 01:57:11,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859500884] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:57:11,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:57:11,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 01:57:11,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728153166] [2023-09-01 01:57:11,551 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:57:11,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:57:11,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:57:11,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:57:11,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:57:13,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 687 [2023-09-01 01:57:13,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 205 flow. Second operand has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:57:13,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:57:13,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 687 [2023-09-01 01:57:13,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:57:14,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:57:15,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:57:21,852 INFO L130 PetriNetUnfolder]: 60704/80981 cut-off events. [2023-09-01 01:57:21,852 INFO L131 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2023-09-01 01:57:21,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162641 conditions, 80981 events. 60704/80981 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 3597. Compared 485371 event pairs, 47271 based on Foata normal form. 0/25030 useless extension candidates. Maximal degree in co-relation 162632. Up to 26993 conditions per place. [2023-09-01 01:57:22,145 INFO L137 encePairwiseOnDemand]: 675/687 looper letters, 203 selfloop transitions, 27 changer transitions 0/230 dead transitions. [2023-09-01 01:57:22,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 230 transitions, 1021 flow [2023-09-01 01:57:22,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:57:22,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:57:22,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1907 transitions. [2023-09-01 01:57:22,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4626394953905871 [2023-09-01 01:57:22,151 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1907 transitions. [2023-09-01 01:57:22,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1907 transitions. [2023-09-01 01:57:22,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:57:22,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1907 transitions. [2023-09-01 01:57:22,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 317.8333333333333) internal successors, (1907), 6 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:57:22,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 687.0) internal successors, (4809), 7 states have internal predecessors, (4809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:57:22,165 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 687.0) internal successors, (4809), 7 states have internal predecessors, (4809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:57:22,166 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 205 flow. Second operand 6 states and 1907 transitions. [2023-09-01 01:57:22,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 230 transitions, 1021 flow [2023-09-01 01:57:22,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 230 transitions, 997 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:57:22,176 INFO L231 Difference]: Finished difference. Result has 79 places, 100 transitions, 397 flow [2023-09-01 01:57:22,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=397, PETRI_PLACES=79, PETRI_TRANSITIONS=100} [2023-09-01 01:57:22,178 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -2 predicate places. [2023-09-01 01:57:22,178 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 100 transitions, 397 flow [2023-09-01 01:57:22,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:57:22,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:57:22,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 01:57:22,189 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 [2023-09-01 01:57:22,388 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 [2023-09-01 01:57:22,389 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:57:22,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:57:22,389 INFO L85 PathProgramCache]: Analyzing trace with hash 39432228, now seen corresponding path program 1 times [2023-09-01 01:57:22,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:57:22,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437709986] [2023-09-01 01:57:22,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:57:22,390 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 [2023-09-01 01:57:22,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:57:22,391 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) [2023-09-01 01:57:22,392 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 [2023-09-01 01:57:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:57:22,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:57:22,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:57:22,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:57:22,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:57:22,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:57:22,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:57:22,583 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-09-01 01:57:22,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-09-01 01:57:22,612 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 01:57:22,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-09-01 01:57:22,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:57:22,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:57:22,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:57:22,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:57:22,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:22,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:57:22,738 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:57:22,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437709986] [2023-09-01 01:57:22,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437709986] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:57:22,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:57:22,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:57:22,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729757796] [2023-09-01 01:57:22,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:57:22,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:57:22,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:57:22,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:57:22,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:57:23,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 687 [2023-09-01 01:57:23,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 100 transitions, 397 flow. Second operand has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:57:23,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:57:23,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 687 [2023-09-01 01:57:23,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:57:28,056 INFO L130 PetriNetUnfolder]: 46590/62748 cut-off events. [2023-09-01 01:57:28,056 INFO L131 PetriNetUnfolder]: For 230/230 co-relation queries the response was YES. [2023-09-01 01:57:28,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126237 conditions, 62748 events. 46590/62748 cut-off events. For 230/230 co-relation queries the response was YES. Maximal size of possible extension queue 2960. Compared 376238 event pairs, 36099 based on Foata normal form. 0/20915 useless extension candidates. Maximal degree in co-relation 126224. Up to 62748 conditions per place. [2023-09-01 01:57:28,310 INFO L137 encePairwiseOnDemand]: 684/687 looper letters, 95 selfloop transitions, 1 changer transitions 0/96 dead transitions. [2023-09-01 01:57:28,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 96 transitions, 569 flow [2023-09-01 01:57:28,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:57:28,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:57:28,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 974 transitions. [2023-09-01 01:57:28,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725861232411451 [2023-09-01 01:57:28,314 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 974 transitions. [2023-09-01 01:57:28,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 974 transitions. [2023-09-01 01:57:28,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:57:28,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 974 transitions. [2023-09-01 01:57:28,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 324.6666666666667) internal successors, (974), 3 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:57:28,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:57:28,322 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:57:28,322 INFO L175 Difference]: Start difference. First operand has 79 places, 100 transitions, 397 flow. Second operand 3 states and 974 transitions. [2023-09-01 01:57:28,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 96 transitions, 569 flow [2023-09-01 01:57:28,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 96 transitions, 539 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 01:57:28,326 INFO L231 Difference]: Finished difference. Result has 78 places, 96 transitions, 349 flow [2023-09-01 01:57:28,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=349, PETRI_PLACES=78, PETRI_TRANSITIONS=96} [2023-09-01 01:57:28,327 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -3 predicate places. [2023-09-01 01:57:28,327 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 96 transitions, 349 flow [2023-09-01 01:57:28,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:57:28,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:57:28,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 01:57:28,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 01:57:28,538 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 [2023-09-01 01:57:28,538 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:57:28,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:57:28,539 INFO L85 PathProgramCache]: Analyzing trace with hash 39432229, now seen corresponding path program 1 times [2023-09-01 01:57:28,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:57:28,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [443833376] [2023-09-01 01:57:28,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:57:28,539 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 [2023-09-01 01:57:28,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:57:28,542 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) [2023-09-01 01:57:28,542 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 [2023-09-01 01:57:28,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:57:28,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 01:57:28,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:57:28,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:57:28,734 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-09-01 01:57:28,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-09-01 01:57:29,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:57:29,039 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-09-01 01:57:29,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2023-09-01 01:57:29,346 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-09-01 01:57:29,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 80 [2023-09-01 01:57:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:31,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:57:31,860 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:57:31,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [443833376] [2023-09-01 01:57:31,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [443833376] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:57:31,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:57:31,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:57:31,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141091832] [2023-09-01 01:57:31,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:57:31,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:57:31,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:57:31,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:57:31,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2023-09-01 01:57:33,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:57:35,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:57:37,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:57:39,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:57:41,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:57:43,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:57:46,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:57:48,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:57:50,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:57:52,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:57:54,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:57:56,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:57:58,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:58:00,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:58:02,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:58:04,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:58:06,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:58:08,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:58:08,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 687 [2023-09-01 01:58:08,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 96 transitions, 349 flow. Second operand has 5 states, 5 states have (on average 245.8) internal successors, (1229), 5 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:08,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:58:08,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 687 [2023-09-01 01:58:08,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:58:12,253 INFO L130 PetriNetUnfolder]: 32476/44515 cut-off events. [2023-09-01 01:58:12,253 INFO L131 PetriNetUnfolder]: For 234/234 co-relation queries the response was YES. [2023-09-01 01:58:12,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89745 conditions, 44515 events. 32476/44515 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 2103. Compared 266327 event pairs, 24927 based on Foata normal form. 0/16799 useless extension candidates. Maximal degree in co-relation 89731. Up to 44515 conditions per place. [2023-09-01 01:58:12,400 INFO L137 encePairwiseOnDemand]: 684/687 looper letters, 91 selfloop transitions, 1 changer transitions 0/92 dead transitions. [2023-09-01 01:58:12,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 513 flow [2023-09-01 01:58:12,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:58:12,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:58:12,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 807 transitions. [2023-09-01 01:58:12,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915574963609898 [2023-09-01 01:58:12,403 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 807 transitions. [2023-09-01 01:58:12,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 807 transitions. [2023-09-01 01:58:12,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:58:12,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 807 transitions. [2023-09-01 01:58:12,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:12,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:12,410 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:12,410 INFO L175 Difference]: Start difference. First operand has 78 places, 96 transitions, 349 flow. Second operand 3 states and 807 transitions. [2023-09-01 01:58:12,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 513 flow [2023-09-01 01:58:12,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 92 transitions, 512 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:58:12,412 INFO L231 Difference]: Finished difference. Result has 77 places, 92 transitions, 330 flow [2023-09-01 01:58:12,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=330, PETRI_PLACES=77, PETRI_TRANSITIONS=92} [2023-09-01 01:58:12,413 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -4 predicate places. [2023-09-01 01:58:12,413 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 92 transitions, 330 flow [2023-09-01 01:58:12,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 245.8) internal successors, (1229), 5 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:12,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:58:12,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 01:58:12,425 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 [2023-09-01 01:58:12,622 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 [2023-09-01 01:58:12,623 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:58:12,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:58:12,623 INFO L85 PathProgramCache]: Analyzing trace with hash -760304014, now seen corresponding path program 1 times [2023-09-01 01:58:12,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:58:12,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173223880] [2023-09-01 01:58:12,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:58:12,624 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 [2023-09-01 01:58:12,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:58:12,625 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) [2023-09-01 01:58:12,626 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 [2023-09-01 01:58:12,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:58:12,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 01:58:12,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:58:12,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:58:12,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:58:12,848 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-09-01 01:58:12,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2023-09-01 01:58:12,871 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 26 treesize of output 24 [2023-09-01 01:58:12,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:58:12,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:58:12,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:58:12,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:58:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:58:13,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:58:13,006 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:58:13,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173223880] [2023-09-01 01:58:13,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173223880] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:58:13,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:58:13,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:58:13,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216187238] [2023-09-01 01:58:13,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:58:13,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:58:13,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:58:13,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:58:13,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:58:13,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 687 [2023-09-01 01:58:13,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 92 transitions, 330 flow. Second operand has 4 states, 4 states have (on average 301.5) internal successors, (1206), 4 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:13,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:58:13,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 687 [2023-09-01 01:58:13,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:58:16,562 INFO L130 PetriNetUnfolder]: 31756/43459 cut-off events. [2023-09-01 01:58:16,563 INFO L131 PetriNetUnfolder]: For 234/234 co-relation queries the response was YES. [2023-09-01 01:58:16,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87634 conditions, 43459 events. 31756/43459 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 2056. Compared 258644 event pairs, 24363 based on Foata normal form. 0/16595 useless extension candidates. Maximal degree in co-relation 87619. Up to 43459 conditions per place. [2023-09-01 01:58:16,719 INFO L137 encePairwiseOnDemand]: 684/687 looper letters, 89 selfloop transitions, 1 changer transitions 0/90 dead transitions. [2023-09-01 01:58:16,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 90 transitions, 506 flow [2023-09-01 01:58:16,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:58:16,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:58:16,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 970 transitions. [2023-09-01 01:58:16,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47064531780688984 [2023-09-01 01:58:16,723 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 970 transitions. [2023-09-01 01:58:16,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 970 transitions. [2023-09-01 01:58:16,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:58:16,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 970 transitions. [2023-09-01 01:58:16,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 323.3333333333333) internal successors, (970), 3 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:16,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:16,729 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:16,729 INFO L175 Difference]: Start difference. First operand has 77 places, 92 transitions, 330 flow. Second operand 3 states and 970 transitions. [2023-09-01 01:58:16,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 90 transitions, 506 flow [2023-09-01 01:58:16,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 90 transitions, 505 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:58:16,731 INFO L231 Difference]: Finished difference. Result has 76 places, 90 transitions, 327 flow [2023-09-01 01:58:16,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=327, PETRI_PLACES=76, PETRI_TRANSITIONS=90} [2023-09-01 01:58:16,732 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -5 predicate places. [2023-09-01 01:58:16,732 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 90 transitions, 327 flow [2023-09-01 01:58:16,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 301.5) internal successors, (1206), 4 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:16,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:58:16,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 01:58:16,742 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 [2023-09-01 01:58:16,943 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 [2023-09-01 01:58:16,943 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:58:16,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:58:16,944 INFO L85 PathProgramCache]: Analyzing trace with hash -760304015, now seen corresponding path program 1 times [2023-09-01 01:58:16,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:58:16,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [665695325] [2023-09-01 01:58:16,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:58:16,944 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 [2023-09-01 01:58:16,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:58:16,945 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) [2023-09-01 01:58:16,947 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 [2023-09-01 01:58:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:58:17,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:58:17,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:58:17,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:58:17,126 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-09-01 01:58:17,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-09-01 01:58:17,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:58:17,313 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-09-01 01:58:17,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2023-09-01 01:58:17,448 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-09-01 01:58:17,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-09-01 01:58:17,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:58:17,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:58:17,538 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:58:17,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [665695325] [2023-09-01 01:58:17,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [665695325] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:58:17,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:58:17,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:58:17,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389558365] [2023-09-01 01:58:17,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:58:17,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:58:17,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:58:17,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:58:17,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:58:18,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 687 [2023-09-01 01:58:18,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 90 transitions, 327 flow. Second operand has 4 states, 4 states have (on average 301.5) internal successors, (1206), 4 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:18,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:58:18,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 687 [2023-09-01 01:58:18,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:58:21,279 INFO L130 PetriNetUnfolder]: 31036/42403 cut-off events. [2023-09-01 01:58:21,280 INFO L131 PetriNetUnfolder]: For 234/234 co-relation queries the response was YES. [2023-09-01 01:58:21,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85523 conditions, 42403 events. 31036/42403 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 2010. Compared 250851 event pairs, 23799 based on Foata normal form. 0/16391 useless extension candidates. Maximal degree in co-relation 85507. Up to 42403 conditions per place. [2023-09-01 01:58:21,443 INFO L137 encePairwiseOnDemand]: 684/687 looper letters, 87 selfloop transitions, 1 changer transitions 0/88 dead transitions. [2023-09-01 01:58:21,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 88 transitions, 499 flow [2023-09-01 01:58:21,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:58:21,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:58:21,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 968 transitions. [2023-09-01 01:58:21,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696749150897622 [2023-09-01 01:58:21,446 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 968 transitions. [2023-09-01 01:58:21,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 968 transitions. [2023-09-01 01:58:21,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:58:21,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 968 transitions. [2023-09-01 01:58:21,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 322.6666666666667) internal successors, (968), 3 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:21,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:21,451 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:21,451 INFO L175 Difference]: Start difference. First operand has 76 places, 90 transitions, 327 flow. Second operand 3 states and 968 transitions. [2023-09-01 01:58:21,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 88 transitions, 499 flow [2023-09-01 01:58:21,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 88 transitions, 498 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:58:21,454 INFO L231 Difference]: Finished difference. Result has 75 places, 88 transitions, 324 flow [2023-09-01 01:58:21,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=75, PETRI_TRANSITIONS=88} [2023-09-01 01:58:21,454 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -6 predicate places. [2023-09-01 01:58:21,455 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 88 transitions, 324 flow [2023-09-01 01:58:21,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 301.5) internal successors, (1206), 4 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:21,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:58:21,455 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 01:58:21,470 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 [2023-09-01 01:58:21,664 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 [2023-09-01 01:58:21,664 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:58:21,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:58:21,665 INFO L85 PathProgramCache]: Analyzing trace with hash -820328468, now seen corresponding path program 2 times [2023-09-01 01:58:21,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:58:21,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410917698] [2023-09-01 01:58:21,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:58:21,666 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 [2023-09-01 01:58:21,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:58:21,667 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) [2023-09-01 01:58:21,669 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 [2023-09-01 01:58:21,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:58:21,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:58:21,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 01:58:21,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:58:21,847 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 01:58:21,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 01:58:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:58:21,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:58:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:58:22,535 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:58:22,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410917698] [2023-09-01 01:58:22,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1410917698] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:58:22,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:58:22,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 01:58:22,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256121422] [2023-09-01 01:58:22,536 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:58:22,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:58:22,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:58:22,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:58:22,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:58:28,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 687 [2023-09-01 01:58:28,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 88 transitions, 324 flow. Second operand has 12 states, 12 states have (on average 282.0) internal successors, (3384), 12 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:28,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:58:28,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 687 [2023-09-01 01:58:28,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:58:31,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:33,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:35,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:37,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:39,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:40,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:41,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:43,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:45,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:47,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:50,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:51,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:53,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:59:10,015 INFO L130 PetriNetUnfolder]: 103433/141300 cut-off events. [2023-09-01 01:59:10,015 INFO L131 PetriNetUnfolder]: For 803/803 co-relation queries the response was YES. [2023-09-01 01:59:10,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284871 conditions, 141300 events. 103433/141300 cut-off events. For 803/803 co-relation queries the response was YES. Maximal size of possible extension queue 4157. Compared 924696 event pairs, 79330 based on Foata normal form. 15/54602 useless extension candidates. Maximal degree in co-relation 284854. Up to 14146 conditions per place. [2023-09-01 01:59:10,600 INFO L137 encePairwiseOnDemand]: 677/687 looper letters, 578 selfloop transitions, 52 changer transitions 0/630 dead transitions. [2023-09-01 01:59:10,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 630 transitions, 2882 flow [2023-09-01 01:59:10,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 01:59:10,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 01:59:10,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 5141 transitions. [2023-09-01 01:59:10,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4677037845705968 [2023-09-01 01:59:10,613 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 5141 transitions. [2023-09-01 01:59:10,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 5141 transitions. [2023-09-01 01:59:10,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:10,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 5141 transitions. [2023-09-01 01:59:10,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 321.3125) internal successors, (5141), 16 states have internal predecessors, (5141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:10,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 687.0) internal successors, (11679), 17 states have internal predecessors, (11679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:10,640 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 687.0) internal successors, (11679), 17 states have internal predecessors, (11679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:10,641 INFO L175 Difference]: Start difference. First operand has 75 places, 88 transitions, 324 flow. Second operand 16 states and 5141 transitions. [2023-09-01 01:59:10,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 630 transitions, 2882 flow [2023-09-01 01:59:10,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 630 transitions, 2881 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:59:10,649 INFO L231 Difference]: Finished difference. Result has 99 places, 119 transitions, 711 flow [2023-09-01 01:59:10,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=711, PETRI_PLACES=99, PETRI_TRANSITIONS=119} [2023-09-01 01:59:10,650 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 18 predicate places. [2023-09-01 01:59:10,650 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 119 transitions, 711 flow [2023-09-01 01:59:10,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 282.0) internal successors, (3384), 12 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:10,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:10,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:10,665 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 [2023-09-01 01:59:10,860 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 [2023-09-01 01:59:10,861 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:59:10,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:10,861 INFO L85 PathProgramCache]: Analyzing trace with hash -2094588439, now seen corresponding path program 1 times [2023-09-01 01:59:10,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:59:10,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008228632] [2023-09-01 01:59:10,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:10,862 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 [2023-09-01 01:59:10,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:59:10,863 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) [2023-09-01 01:59:10,863 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 [2023-09-01 01:59:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:10,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:59:10,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:59:11,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:59:11,021 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:59:11,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008228632] [2023-09-01 01:59:11,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008228632] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:59:11,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:59:11,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:59:11,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139102430] [2023-09-01 01:59:11,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:59:11,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:59:11,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:59:11,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:59:11,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:59:11,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 687 [2023-09-01 01:59:11,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 119 transitions, 711 flow. Second operand has 5 states, 5 states have (on average 292.4) internal successors, (1462), 5 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:11,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:11,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 687 [2023-09-01 01:59:11,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:28,097 INFO L130 PetriNetUnfolder]: 137234/189816 cut-off events. [2023-09-01 01:59:28,097 INFO L131 PetriNetUnfolder]: For 1697/1697 co-relation queries the response was YES. [2023-09-01 01:59:28,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 382827 conditions, 189816 events. 137234/189816 cut-off events. For 1697/1697 co-relation queries the response was YES. Maximal size of possible extension queue 5312. Compared 1325007 event pairs, 91700 based on Foata normal form. 0/77613 useless extension candidates. Maximal degree in co-relation 382799. Up to 141299 conditions per place. [2023-09-01 01:59:29,239 INFO L137 encePairwiseOnDemand]: 678/687 looper letters, 236 selfloop transitions, 4 changer transitions 0/240 dead transitions. [2023-09-01 01:59:29,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 240 transitions, 1731 flow [2023-09-01 01:59:29,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:59:29,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:59:29,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1616 transitions. [2023-09-01 01:59:29,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47045123726346433 [2023-09-01 01:59:29,242 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1616 transitions. [2023-09-01 01:59:29,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1616 transitions. [2023-09-01 01:59:29,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:29,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1616 transitions. [2023-09-01 01:59:29,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 323.2) internal successors, (1616), 5 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:29,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 687.0) internal successors, (4122), 6 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:29,249 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 687.0) internal successors, (4122), 6 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:29,249 INFO L175 Difference]: Start difference. First operand has 99 places, 119 transitions, 711 flow. Second operand 5 states and 1616 transitions. [2023-09-01 01:59:29,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 240 transitions, 1731 flow [2023-09-01 01:59:29,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 240 transitions, 1572 flow, removed 38 selfloop flow, removed 4 redundant places. [2023-09-01 01:59:29,256 INFO L231 Difference]: Finished difference. Result has 101 places, 120 transitions, 636 flow [2023-09-01 01:59:29,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=636, PETRI_PLACES=101, PETRI_TRANSITIONS=120} [2023-09-01 01:59:29,257 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 20 predicate places. [2023-09-01 01:59:29,257 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 120 transitions, 636 flow [2023-09-01 01:59:29,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 292.4) internal successors, (1462), 5 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:29,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:29,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:29,267 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 [2023-09-01 01:59:29,466 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 [2023-09-01 01:59:29,467 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:59:29,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:29,467 INFO L85 PathProgramCache]: Analyzing trace with hash -507690306, now seen corresponding path program 1 times [2023-09-01 01:59:29,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:59:29,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007579763] [2023-09-01 01:59:29,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:29,467 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 [2023-09-01 01:59:29,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:59:29,469 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) [2023-09-01 01:59:29,470 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 [2023-09-01 01:59:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:29,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 01:59:29,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:29,628 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-09-01 01:59:29,628 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 33 treesize of output 44 [2023-09-01 01:59:29,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:59:29,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:59:29,703 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 01:59:29,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:59:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:59:29,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:59:29,762 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:59:29,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007579763] [2023-09-01 01:59:29,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007579763] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:59:29,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:59:29,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:59:29,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203484059] [2023-09-01 01:59:29,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:59:29,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:59:29,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:59:29,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:59:29,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:59:30,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 687 [2023-09-01 01:59:30,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 120 transitions, 636 flow. Second operand has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:30,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:30,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 687 [2023-09-01 01:59:30,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:45,548 INFO L130 PetriNetUnfolder]: 131454/181306 cut-off events. [2023-09-01 01:59:45,548 INFO L131 PetriNetUnfolder]: For 14458/14458 co-relation queries the response was YES. [2023-09-01 01:59:46,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384915 conditions, 181306 events. 131454/181306 cut-off events. For 14458/14458 co-relation queries the response was YES. Maximal size of possible extension queue 5025. Compared 1238003 event pairs, 101840 based on Foata normal form. 0/82876 useless extension candidates. Maximal degree in co-relation 384884. Up to 181306 conditions per place. [2023-09-01 01:59:46,728 INFO L137 encePairwiseOnDemand]: 684/687 looper letters, 117 selfloop transitions, 1 changer transitions 0/118 dead transitions. [2023-09-01 01:59:46,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 118 transitions, 868 flow [2023-09-01 01:59:46,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:59:46,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:59:46,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 954 transitions. [2023-09-01 01:59:46,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.462882096069869 [2023-09-01 01:59:46,730 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 954 transitions. [2023-09-01 01:59:46,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 954 transitions. [2023-09-01 01:59:46,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:46,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 954 transitions. [2023-09-01 01:59:46,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 318.0) internal successors, (954), 3 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:46,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:46,734 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:46,734 INFO L175 Difference]: Start difference. First operand has 101 places, 120 transitions, 636 flow. Second operand 3 states and 954 transitions. [2023-09-01 01:59:46,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 118 transitions, 868 flow [2023-09-01 01:59:46,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 118 transitions, 862 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 01:59:46,747 INFO L231 Difference]: Finished difference. Result has 100 places, 118 transitions, 628 flow [2023-09-01 01:59:46,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=628, PETRI_PLACES=100, PETRI_TRANSITIONS=118} [2023-09-01 01:59:46,748 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 19 predicate places. [2023-09-01 01:59:46,749 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 118 transitions, 628 flow [2023-09-01 01:59:46,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:46,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:46,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:46,761 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 [2023-09-01 01:59:46,949 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 [2023-09-01 01:59:46,950 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:59:46,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:46,950 INFO L85 PathProgramCache]: Analyzing trace with hash -507690307, now seen corresponding path program 1 times [2023-09-01 01:59:46,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:59:46,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421308784] [2023-09-01 01:59:46,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:46,951 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 [2023-09-01 01:59:46,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:59:46,952 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) [2023-09-01 01:59:46,953 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 [2023-09-01 01:59:47,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:47,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:59:47,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:47,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:59:47,158 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-09-01 01:59:47,159 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 15 treesize of output 38 [2023-09-01 01:59:47,173 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 60 treesize of output 58 [2023-09-01 01:59:47,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:59:47,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:59:47,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:59:47,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:59:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:59:47,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:59:47,327 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:59:47,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421308784] [2023-09-01 01:59:47,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421308784] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:59:47,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:59:47,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:59:47,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367547653] [2023-09-01 01:59:47,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:59:47,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:59:47,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:59:47,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:59:47,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:59:47,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 687 [2023-09-01 01:59:47,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 118 transitions, 628 flow. Second operand has 5 states, 5 states have (on average 299.6) internal successors, (1498), 5 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:47,930 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:47,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 687 [2023-09-01 01:59:47,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:00:02,583 INFO L130 PetriNetUnfolder]: 125674/172796 cut-off events. [2023-09-01 02:00:02,583 INFO L131 PetriNetUnfolder]: For 13770/13770 co-relation queries the response was YES. [2023-09-01 02:00:03,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366773 conditions, 172796 events. 125674/172796 cut-off events. For 13770/13770 co-relation queries the response was YES. Maximal size of possible extension queue 4782. Compared 1166037 event pairs, 97080 based on Foata normal form. 0/80516 useless extension candidates. Maximal degree in co-relation 366741. Up to 172796 conditions per place. [2023-09-01 02:00:03,519 INFO L137 encePairwiseOnDemand]: 684/687 looper letters, 115 selfloop transitions, 1 changer transitions 0/116 dead transitions. [2023-09-01 02:00:03,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 116 transitions, 856 flow [2023-09-01 02:00:03,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:00:03,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:00:03,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 958 transitions. [2023-09-01 02:00:03,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4648229015041242 [2023-09-01 02:00:03,521 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 958 transitions. [2023-09-01 02:00:03,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 958 transitions. [2023-09-01 02:00:03,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:00:03,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 958 transitions. [2023-09-01 02:00:03,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 319.3333333333333) internal successors, (958), 3 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:03,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:03,524 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:03,524 INFO L175 Difference]: Start difference. First operand has 100 places, 118 transitions, 628 flow. Second operand 3 states and 958 transitions. [2023-09-01 02:00:03,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 116 transitions, 856 flow [2023-09-01 02:00:03,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 116 transitions, 855 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:00:03,538 INFO L231 Difference]: Finished difference. Result has 99 places, 116 transitions, 625 flow [2023-09-01 02:00:03,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=625, PETRI_PLACES=99, PETRI_TRANSITIONS=116} [2023-09-01 02:00:03,538 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 18 predicate places. [2023-09-01 02:00:03,539 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 116 transitions, 625 flow [2023-09-01 02:00:03,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 299.6) internal successors, (1498), 5 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:03,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:00:03,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:00:03,549 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 [2023-09-01 02:00:03,745 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 [2023-09-01 02:00:03,746 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 02:00:03,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:00:03,746 INFO L85 PathProgramCache]: Analyzing trace with hash -495740347, now seen corresponding path program 1 times [2023-09-01 02:00:03,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:00:03,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328852003] [2023-09-01 02:00:03,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:00:03,747 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 [2023-09-01 02:00:03,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:00:03,748 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) [2023-09-01 02:00:03,749 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 [2023-09-01 02:00:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:00:03,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:00:03,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:00:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:00:03,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:00:03,925 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:00:03,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328852003] [2023-09-01 02:00:03,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328852003] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:00:03,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:00:03,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 02:00:03,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873014490] [2023-09-01 02:00:03,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:00:03,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:00:03,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:00:03,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:00:03,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:00:04,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 687 [2023-09-01 02:00:04,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 116 transitions, 625 flow. Second operand has 5 states, 5 states have (on average 292.6) internal successors, (1463), 5 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:04,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:00:04,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 687 [2023-09-01 02:00:04,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:00:28,971 INFO L130 PetriNetUnfolder]: 188376/262106 cut-off events. [2023-09-01 02:00:28,971 INFO L131 PetriNetUnfolder]: For 24452/24452 co-relation queries the response was YES. [2023-09-01 02:00:29,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553564 conditions, 262106 events. 188376/262106 cut-off events. For 24452/24452 co-relation queries the response was YES. Maximal size of possible extension queue 7331. Compared 1933731 event pairs, 119980 based on Foata normal form. 2260/131206 useless extension candidates. Maximal degree in co-relation 553531. Up to 172784 conditions per place. [2023-09-01 02:00:30,495 INFO L137 encePairwiseOnDemand]: 678/687 looper letters, 194 selfloop transitions, 15 changer transitions 0/209 dead transitions. [2023-09-01 02:00:30,495 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 209 transitions, 1356 flow [2023-09-01 02:00:30,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:00:30,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:00:30,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1601 transitions. [2023-09-01 02:00:30,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4660844250363901 [2023-09-01 02:00:30,498 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1601 transitions. [2023-09-01 02:00:30,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1601 transitions. [2023-09-01 02:00:30,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:00:30,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1601 transitions. [2023-09-01 02:00:30,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 320.2) internal successors, (1601), 5 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:30,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 687.0) internal successors, (4122), 6 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:30,503 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 687.0) internal successors, (4122), 6 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:30,503 INFO L175 Difference]: Start difference. First operand has 99 places, 116 transitions, 625 flow. Second operand 5 states and 1601 transitions. [2023-09-01 02:00:30,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 209 transitions, 1356 flow [2023-09-01 02:00:30,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 209 transitions, 1355 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:00:30,522 INFO L231 Difference]: Finished difference. Result has 104 places, 118 transitions, 683 flow [2023-09-01 02:00:30,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=683, PETRI_PLACES=104, PETRI_TRANSITIONS=118} [2023-09-01 02:00:30,523 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 23 predicate places. [2023-09-01 02:00:30,523 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 118 transitions, 683 flow [2023-09-01 02:00:30,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 292.6) internal successors, (1463), 5 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:30,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:00:30,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:00:30,535 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 [2023-09-01 02:00:30,732 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 [2023-09-01 02:00:30,732 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 02:00:30,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:00:30,733 INFO L85 PathProgramCache]: Analyzing trace with hash 642384722, now seen corresponding path program 1 times [2023-09-01 02:00:30,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:00:30,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [653780673] [2023-09-01 02:00:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:00:30,734 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 [2023-09-01 02:00:30,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:00:30,734 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) [2023-09-01 02:00:30,735 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 [2023-09-01 02:00:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:00:30,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 02:00:30,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:00:30,919 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 02:00:30,924 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 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 02:00:31,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:00:31,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 02:00:31,116 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 02:00:31,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 02:00:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:00:31,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:00:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:00:35,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:00:35,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [653780673] [2023-09-01 02:00:35,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [653780673] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:00:35,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:00:35,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 02:00:35,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524575265] [2023-09-01 02:00:35,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:00:35,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 02:00:35,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:00:35,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 02:00:35,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-09-01 02:00:41,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 687 [2023-09-01 02:00:41,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 118 transitions, 683 flow. Second operand has 10 states, 10 states have (on average 265.6) internal successors, (2656), 10 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:41,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:00:41,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 687 [2023-09-01 02:00:41,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand