./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue.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 c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:50:00,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:50:00,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:50:00,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:50:00,757 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:50:00,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:50:00,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:50:00,762 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:50:00,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:50:00,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:50:00,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:50:00,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:50:00,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:50:00,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:50:00,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:50:00,775 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:50:00,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:50:00,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:50:00,778 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:50:00,781 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:50:00,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:50:00,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:50:00,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:50:00,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:50:00,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:50:00,789 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:50:00,790 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:50:00,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:50:00,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:50:00,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:50:00,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:50:00,796 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:50:00,797 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:50:00,797 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:50:00,798 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:50:00,799 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:50:00,799 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:50:00,799 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:50:00,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:50:00,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:50:00,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:50:00,802 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:50:00,826 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:50:00,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:50:00,827 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:50:00,827 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:50:00,828 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:50:00,828 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:50:00,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:50:00,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:50:00,828 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:50:00,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:50:00,829 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:50:00,829 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:50:00,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:50:00,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:50:00,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:50:00,830 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:50:00,830 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:50:00,830 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:50:00,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:50:00,830 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:50:00,831 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:50:00,831 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:50:00,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:50:00,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:50:00,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:50:00,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:50:00,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:50:00,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:50:00,832 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:50:00,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:50:00,832 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:50:00,832 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:50:00,832 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:50:00,833 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:50:00,833 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:50:01,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:50:01,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:50:01,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:50:01,067 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:50:01,067 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:50:01,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c [2023-08-29 23:50:01,984 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:50:02,146 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:50:02,146 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c [2023-08-29 23:50:02,150 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb7a0bfdf/7029e1478ddc4eeaac00384eb3f06e11/FLAG078f44c15 [2023-08-29 23:50:02,161 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb7a0bfdf/7029e1478ddc4eeaac00384eb3f06e11 [2023-08-29 23:50:02,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:50:02,163 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:50:02,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:50:02,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:50:02,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:50:02,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:50:02" (1/1) ... [2023-08-29 23:50:02,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@500e0d2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:02, skipping insertion in model container [2023-08-29 23:50:02,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:50:02" (1/1) ... [2023-08-29 23:50:02,173 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:50:02,187 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:50:02,289 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2023-08-29 23:50:02,308 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:50:02,315 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-29 23:50:02,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3a2896ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:02, skipping insertion in model container [2023-08-29 23:50:02,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:50:02,318 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 23:50:02,319 INFO L158 Benchmark]: Toolchain (without parser) took 155.09ms. Allocated memory is still 88.1MB. Free memory was 66.2MB in the beginning and 56.2MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 23:50:02,319 INFO L158 Benchmark]: CDTParser took 0.65ms. Allocated memory is still 62.9MB. Free memory is still 40.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 23:50:02,320 INFO L158 Benchmark]: CACSL2BoogieTranslator took 153.41ms. Allocated memory is still 88.1MB. Free memory was 65.8MB in the beginning and 56.2MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 23:50:02,321 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.65ms. Allocated memory is still 62.9MB. Free memory is still 40.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 153.41ms. Allocated memory is still 88.1MB. Free memory was 65.8MB in the beginning and 56.2MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 96]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue.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 c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:50:03,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:50:03,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:50:03,554 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:50:03,555 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:50:03,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:50:03,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:50:03,557 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:50:03,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:50:03,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:50:03,559 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:50:03,560 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:50:03,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:50:03,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:50:03,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:50:03,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:50:03,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:50:03,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:50:03,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:50:03,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:50:03,574 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:50:03,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:50:03,580 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:50:03,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:50:03,584 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:50:03,588 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:50:03,589 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:50:03,589 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:50:03,590 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:50:03,590 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:50:03,590 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:50:03,591 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:50:03,591 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:50:03,592 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:50:03,593 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:50:03,594 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:50:03,594 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:50:03,595 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:50:03,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:50:03,596 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:50:03,597 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:50:03,598 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 23:50:03,620 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:50:03,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:50:03,621 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:50:03,621 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:50:03,622 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:50:03,622 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:50:03,623 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:50:03,623 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:50:03,623 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:50:03,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:50:03,624 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:50:03,624 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:50:03,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:50:03,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:50:03,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:50:03,625 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:50:03,625 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:50:03,625 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:50:03,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:50:03,625 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:50:03,625 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 23:50:03,626 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 23:50:03,626 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:50:03,626 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:50:03,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:50:03,626 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:50:03,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:50:03,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:50:03,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:50:03,627 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:50:03,627 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 23:50:03,627 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 23:50:03,627 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:50:03,627 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:50:03,628 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:50:03,628 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 23:50:03,628 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:50:03,628 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:50:03,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:50:03,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:50:03,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:50:03,831 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:50:03,831 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:50:03,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c [2023-08-29 23:50:04,799 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:50:04,968 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:50:04,969 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c [2023-08-29 23:50:04,974 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b05eddad/247f2e3a1ed644fc9cc4b089d9ec02c9/FLAGfe4383621 [2023-08-29 23:50:04,984 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b05eddad/247f2e3a1ed644fc9cc4b089d9ec02c9 [2023-08-29 23:50:04,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:50:04,986 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:50:04,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:50:04,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:50:05,002 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:50:05,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:50:04" (1/1) ... [2023-08-29 23:50:05,005 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49044b7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:05, skipping insertion in model container [2023-08-29 23:50:05,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:50:04" (1/1) ... [2023-08-29 23:50:05,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:50:05,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:50:05,157 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2023-08-29 23:50:05,173 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:50:05,189 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 23:50:05,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:50:05,210 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2023-08-29 23:50:05,219 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:50:05,224 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:50:05,249 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2023-08-29 23:50:05,253 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:50:05,264 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:50:05,265 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:50:05,269 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:50:05,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:05 WrapperNode [2023-08-29 23:50:05,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:50:05,270 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:50:05,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:50:05,270 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:50:05,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:05" (1/1) ... [2023-08-29 23:50:05,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:05" (1/1) ... [2023-08-29 23:50:05,314 INFO L138 Inliner]: procedures = 28, calls = 40, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 142 [2023-08-29 23:50:05,315 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:50:05,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:50:05,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:50:05,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:50:05,323 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:05" (1/1) ... [2023-08-29 23:50:05,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:05" (1/1) ... [2023-08-29 23:50:05,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:05" (1/1) ... [2023-08-29 23:50:05,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:05" (1/1) ... [2023-08-29 23:50:05,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:05" (1/1) ... [2023-08-29 23:50:05,351 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:05" (1/1) ... [2023-08-29 23:50:05,355 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:05" (1/1) ... [2023-08-29 23:50:05,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:05" (1/1) ... [2023-08-29 23:50:05,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:50:05,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:50:05,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:50:05,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:50:05,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:05" (1/1) ... [2023-08-29 23:50:05,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:50:05,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:50:05,394 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 23:50:05,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 23:50:05,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:50:05,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 23:50:05,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:50:05,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 23:50:05,424 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:50:05,424 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:50:05,424 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:50:05,424 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:50:05,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 23:50:05,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 23:50:05,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 23:50:05,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:50:05,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:50:05,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:50:05,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 23:50:05,427 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 23:50:05,499 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:50:05,506 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:50:05,802 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:50:05,925 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:50:05,925 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-29 23:50:05,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:50:05 BoogieIcfgContainer [2023-08-29 23:50:05,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:50:05,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:50:05,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:50:05,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:50:05,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:50:04" (1/3) ... [2023-08-29 23:50:05,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@532782fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:50:05, skipping insertion in model container [2023-08-29 23:50:05,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:50:05" (2/3) ... [2023-08-29 23:50:05,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@532782fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:50:05, skipping insertion in model container [2023-08-29 23:50:05,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:50:05" (3/3) ... [2023-08-29 23:50:05,936 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2023-08-29 23:50:05,946 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:50:05,946 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-08-29 23:50:05,947 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:50:06,029 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 23:50:06,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 127 transitions, 270 flow [2023-08-29 23:50:06,111 INFO L130 PetriNetUnfolder]: 9/125 cut-off events. [2023-08-29 23:50:06,111 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:50:06,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 125 events. 9/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 136 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-08-29 23:50:06,115 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 127 transitions, 270 flow [2023-08-29 23:50:06,120 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 121 transitions, 254 flow [2023-08-29 23:50:06,125 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:50:06,132 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 119 places, 121 transitions, 254 flow [2023-08-29 23:50:06,134 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 119 places, 121 transitions, 254 flow [2023-08-29 23:50:06,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 121 transitions, 254 flow [2023-08-29 23:50:06,152 INFO L130 PetriNetUnfolder]: 9/121 cut-off events. [2023-08-29 23:50:06,152 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:50:06,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 121 events. 9/121 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 135 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-08-29 23:50:06,154 INFO L119 LiptonReduction]: Number of co-enabled transitions 936 [2023-08-29 23:50:15,027 INFO L134 LiptonReduction]: Checked pairs total: 1568 [2023-08-29 23:50:15,027 INFO L136 LiptonReduction]: Total number of compositions: 124 [2023-08-29 23:50:15,036 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:50:15,040 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;@3a629535, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:50:15,040 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-08-29 23:50:15,042 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 23:50:15,043 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:50:15,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:15,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:50:15,043 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:50:15,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:15,046 INFO L85 PathProgramCache]: Analyzing trace with hash 18618, now seen corresponding path program 1 times [2023-08-29 23:50:15,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:15,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1680250598] [2023-08-29 23:50:15,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:50:15,054 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:15,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:15,057 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:50:15,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 23:50:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:50:15,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 23:50:15,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:15,201 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 23:50:15,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 23:50:15,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:15,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:50:15,228 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:15,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1680250598] [2023-08-29 23:50:15,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1680250598] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:50:15,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:50:15,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:50:15,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463864351] [2023-08-29 23:50:15,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:50:15,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:50:15,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:15,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:50:15,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:50:15,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 251 [2023-08-29 23:50:15,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:15,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:15,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 251 [2023-08-29 23:50:15,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:50:15,490 INFO L130 PetriNetUnfolder]: 429/628 cut-off events. [2023-08-29 23:50:15,490 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-29 23:50:15,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1275 conditions, 628 events. 429/628 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 2670 event pairs, 222 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 1124. Up to 622 conditions per place. [2023-08-29 23:50:15,496 INFO L137 encePairwiseOnDemand]: 248/251 looper letters, 29 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-08-29 23:50:15,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 136 flow [2023-08-29 23:50:15,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:50:15,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:50:15,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 356 transitions. [2023-08-29 23:50:15,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47277556440903057 [2023-08-29 23:50:15,512 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 356 transitions. [2023-08-29 23:50:15,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 356 transitions. [2023-08-29 23:50:15,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:50:15,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 356 transitions. [2023-08-29 23:50:15,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:15,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:15,525 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:15,526 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 80 flow. Second operand 3 states and 356 transitions. [2023-08-29 23:50:15,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 136 flow [2023-08-29 23:50:15,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 128 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 23:50:15,541 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 70 flow [2023-08-29 23:50:15,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2023-08-29 23:50:15,545 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2023-08-29 23:50:15,545 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 70 flow [2023-08-29 23:50:15,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:15,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:15,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:50:15,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-29 23:50:15,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:15,751 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:50:15,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:15,751 INFO L85 PathProgramCache]: Analyzing trace with hash 18619, now seen corresponding path program 1 times [2023-08-29 23:50:15,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:15,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [560373129] [2023-08-29 23:50:15,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:50:15,752 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:15,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:15,753 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:50:15,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 23:50:15,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:50:15,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:50:15,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:15,880 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:50:15,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:50:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:15,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:50:15,903 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:15,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [560373129] [2023-08-29 23:50:15,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [560373129] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:50:15,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:50:15,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:50:15,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470909530] [2023-08-29 23:50:15,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:50:15,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:50:15,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:15,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:50:15,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:50:16,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 251 [2023-08-29 23:50:16,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:16,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:16,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 251 [2023-08-29 23:50:16,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:50:16,255 INFO L130 PetriNetUnfolder]: 857/1254 cut-off events. [2023-08-29 23:50:16,256 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:50:16,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2514 conditions, 1254 events. 857/1254 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 6094 event pairs, 444 based on Foata normal form. 0/448 useless extension candidates. Maximal degree in co-relation 2508. Up to 623 conditions per place. [2023-08-29 23:50:16,261 INFO L137 encePairwiseOnDemand]: 248/251 looper letters, 56 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-08-29 23:50:16,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 60 transitions, 246 flow [2023-08-29 23:50:16,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:50:16,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:50:16,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 383 transitions. [2023-08-29 23:50:16,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5086321381142098 [2023-08-29 23:50:16,264 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 383 transitions. [2023-08-29 23:50:16,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 383 transitions. [2023-08-29 23:50:16,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:50:16,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 383 transitions. [2023-08-29 23:50:16,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:16,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:16,267 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:16,267 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 70 flow. Second operand 3 states and 383 transitions. [2023-08-29 23:50:16,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 60 transitions, 246 flow [2023-08-29 23:50:16,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 60 transitions, 245 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:50:16,269 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 81 flow [2023-08-29 23:50:16,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2023-08-29 23:50:16,269 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2023-08-29 23:50:16,269 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 81 flow [2023-08-29 23:50:16,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:16,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:16,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:50:16,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-29 23:50:16,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:16,477 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:50:16,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:16,477 INFO L85 PathProgramCache]: Analyzing trace with hash 18644, now seen corresponding path program 1 times [2023-08-29 23:50:16,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:16,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44325207] [2023-08-29 23:50:16,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:50:16,478 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:16,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:16,479 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:50:16,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 23:50:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:50:16,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:50:16,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:16,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:50:16,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:50:16,567 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 23:50:16,568 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 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-29 23:50:16,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-29 23:50:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:16,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:50:16,620 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:16,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44325207] [2023-08-29 23:50:16,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44325207] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:50:16,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:50:16,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:50:16,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310998637] [2023-08-29 23:50:16,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:50:16,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:50:16,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:16,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:50:16,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:50:16,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 251 [2023-08-29 23:50:16,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:16,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:16,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 251 [2023-08-29 23:50:16,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:50:16,862 INFO L130 PetriNetUnfolder]: 651/974 cut-off events. [2023-08-29 23:50:16,863 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:50:16,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1960 conditions, 974 events. 651/974 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 4667 event pairs, 334 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 1952. Up to 962 conditions per place. [2023-08-29 23:50:16,868 INFO L137 encePairwiseOnDemand]: 248/251 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-29 23:50:16,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 135 flow [2023-08-29 23:50:16,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:50:16,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:50:16,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 354 transitions. [2023-08-29 23:50:16,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4701195219123506 [2023-08-29 23:50:16,870 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 354 transitions. [2023-08-29 23:50:16,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 354 transitions. [2023-08-29 23:50:16,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:50:16,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 354 transitions. [2023-08-29 23:50:16,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:16,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:16,875 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:16,875 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 81 flow. Second operand 3 states and 354 transitions. [2023-08-29 23:50:16,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 135 flow [2023-08-29 23:50:16,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 133 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:50:16,876 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 77 flow [2023-08-29 23:50:16,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-08-29 23:50:16,878 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-08-29 23:50:16,878 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 77 flow [2023-08-29 23:50:16,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:16,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:16,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:50:16,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-29 23:50:17,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:17,086 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:50:17,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:17,086 INFO L85 PathProgramCache]: Analyzing trace with hash 18646, now seen corresponding path program 1 times [2023-08-29 23:50:17,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:17,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342604103] [2023-08-29 23:50:17,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:50:17,087 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:17,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:17,088 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:50:17,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 23:50:17,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:50:17,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:50:17,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:17,175 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2023-08-29 23:50:17,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2023-08-29 23:50:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:17,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:50:17,193 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:17,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342604103] [2023-08-29 23:50:17,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342604103] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:50:17,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:50:17,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:50:17,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685776371] [2023-08-29 23:50:17,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:50:17,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:50:17,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:17,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:50:17,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:50:17,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 251 [2023-08-29 23:50:17,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:17,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:17,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 251 [2023-08-29 23:50:17,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:50:17,357 INFO L130 PetriNetUnfolder]: 445/694 cut-off events. [2023-08-29 23:50:17,357 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:50:17,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1400 conditions, 694 events. 445/694 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3260 event pairs, 224 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 1391. Up to 682 conditions per place. [2023-08-29 23:50:17,360 INFO L137 encePairwiseOnDemand]: 248/251 looper letters, 26 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-29 23:50:17,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 127 flow [2023-08-29 23:50:17,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:50:17,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:50:17,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 343 transitions. [2023-08-29 23:50:17,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4555112881806109 [2023-08-29 23:50:17,362 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 343 transitions. [2023-08-29 23:50:17,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 343 transitions. [2023-08-29 23:50:17,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:50:17,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 343 transitions. [2023-08-29 23:50:17,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:17,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:17,364 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:17,364 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 77 flow. Second operand 3 states and 343 transitions. [2023-08-29 23:50:17,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 127 flow [2023-08-29 23:50:17,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 29 transitions, 126 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:50:17,366 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 74 flow [2023-08-29 23:50:17,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2023-08-29 23:50:17,367 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2023-08-29 23:50:17,367 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 74 flow [2023-08-29 23:50:17,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:17,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:17,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:50:17,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-08-29 23:50:17,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:17,576 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:50:17,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:17,577 INFO L85 PathProgramCache]: Analyzing trace with hash 578572, now seen corresponding path program 1 times [2023-08-29 23:50:17,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:17,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164377901] [2023-08-29 23:50:17,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:50:17,577 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:17,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:17,578 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:50:17,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-29 23:50:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:50:17,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:50:17,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:17,665 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:50:17,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:50:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:17,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:50:17,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:17,843 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:17,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164377901] [2023-08-29 23:50:17,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164377901] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:50:17,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:50:17,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 23:50:17,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460587978] [2023-08-29 23:50:17,844 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:50:17,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:50:17,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:17,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:50:17,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:50:18,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 251 [2023-08-29 23:50:18,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 74 flow. Second operand has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:18,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:18,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 251 [2023-08-29 23:50:18,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:50:18,558 INFO L130 PetriNetUnfolder]: 669/1044 cut-off events. [2023-08-29 23:50:18,558 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 23:50:18,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2105 conditions, 1044 events. 669/1044 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 5345 event pairs, 336 based on Foata normal form. 0/463 useless extension candidates. Maximal degree in co-relation 2095. Up to 342 conditions per place. [2023-08-29 23:50:18,562 INFO L137 encePairwiseOnDemand]: 247/251 looper letters, 71 selfloop transitions, 7 changer transitions 0/80 dead transitions. [2023-08-29 23:50:18,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 80 transitions, 346 flow [2023-08-29 23:50:18,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:50:18,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:50:18,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 699 transitions. [2023-08-29 23:50:18,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641434262948207 [2023-08-29 23:50:18,564 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 699 transitions. [2023-08-29 23:50:18,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 699 transitions. [2023-08-29 23:50:18,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:50:18,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 699 transitions. [2023-08-29 23:50:18,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 116.5) internal successors, (699), 6 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:18,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 251.0) internal successors, (1757), 7 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:18,568 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 251.0) internal successors, (1757), 7 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:18,569 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 74 flow. Second operand 6 states and 699 transitions. [2023-08-29 23:50:18,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 80 transitions, 346 flow [2023-08-29 23:50:18,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 80 transitions, 345 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:50:18,570 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 127 flow [2023-08-29 23:50:18,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=127, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2023-08-29 23:50:18,571 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-08-29 23:50:18,571 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 127 flow [2023-08-29 23:50:18,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:18,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:18,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 23:50:18,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-08-29 23:50:18,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:18,778 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:50:18,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:18,778 INFO L85 PathProgramCache]: Analyzing trace with hash 17931614, now seen corresponding path program 1 times [2023-08-29 23:50:18,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:18,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1601472407] [2023-08-29 23:50:18,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:50:18,779 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:18,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:18,780 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:50:18,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 23:50:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:50:18,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 23:50:18,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:18,860 INFO L321 Elim1Store]: treesize reduction 43, result has 33.8 percent of original size [2023-08-29 23:50:18,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 29 [2023-08-29 23:50:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:18,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:50:18,875 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:18,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1601472407] [2023-08-29 23:50:18,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1601472407] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:50:18,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:50:18,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:50:18,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898510406] [2023-08-29 23:50:18,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:50:18,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:50:18,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:18,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:50:18,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:50:18,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 251 [2023-08-29 23:50:18,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:18,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:18,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 251 [2023-08-29 23:50:18,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:50:19,034 INFO L130 PetriNetUnfolder]: 618/957 cut-off events. [2023-08-29 23:50:19,035 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 23:50:19,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1957 conditions, 957 events. 618/957 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 4748 event pairs, 309 based on Foata normal form. 0/444 useless extension candidates. Maximal degree in co-relation 1942. Up to 939 conditions per place. [2023-08-29 23:50:19,042 INFO L137 encePairwiseOnDemand]: 248/251 looper letters, 29 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-08-29 23:50:19,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 32 transitions, 183 flow [2023-08-29 23:50:19,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:50:19,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:50:19,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 341 transitions. [2023-08-29 23:50:19,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45285524568393093 [2023-08-29 23:50:19,044 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 341 transitions. [2023-08-29 23:50:19,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 341 transitions. [2023-08-29 23:50:19,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:50:19,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 341 transitions. [2023-08-29 23:50:19,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:19,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:19,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:19,047 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 127 flow. Second operand 3 states and 341 transitions. [2023-08-29 23:50:19,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 32 transitions, 183 flow [2023-08-29 23:50:19,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 32 transitions, 173 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-29 23:50:19,049 INFO L231 Difference]: Finished difference. Result has 41 places, 32 transitions, 115 flow [2023-08-29 23:50:19,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=41, PETRI_TRANSITIONS=32} [2023-08-29 23:50:19,050 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-08-29 23:50:19,051 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 32 transitions, 115 flow [2023-08-29 23:50:19,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:19,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:19,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 23:50:19,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-29 23:50:19,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:19,258 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:50:19,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:19,258 INFO L85 PathProgramCache]: Analyzing trace with hash 17931615, now seen corresponding path program 1 times [2023-08-29 23:50:19,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:19,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111877583] [2023-08-29 23:50:19,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:50:19,259 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:19,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:19,262 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:50:19,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 23:50:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:50:19,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:50:19,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:19,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:50:19,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:50:19,331 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 23:50:19,332 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 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-29 23:50:19,336 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 14 treesize of output 12 [2023-08-29 23:50:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:19,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:50:19,352 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:19,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111877583] [2023-08-29 23:50:19,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [111877583] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:50:19,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:50:19,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:50:19,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032402294] [2023-08-29 23:50:19,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:50:19,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:50:19,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:19,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:50:19,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:50:19,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 251 [2023-08-29 23:50:19,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 32 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:19,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:19,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 251 [2023-08-29 23:50:19,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:50:19,514 INFO L130 PetriNetUnfolder]: 567/870 cut-off events. [2023-08-29 23:50:19,515 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-29 23:50:19,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1780 conditions, 870 events. 567/870 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 4220 event pairs, 282 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 1764. Up to 852 conditions per place. [2023-08-29 23:50:19,518 INFO L137 encePairwiseOnDemand]: 248/251 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-29 23:50:19,518 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 30 transitions, 167 flow [2023-08-29 23:50:19,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:50:19,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:50:19,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2023-08-29 23:50:19,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46215139442231074 [2023-08-29 23:50:19,519 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 348 transitions. [2023-08-29 23:50:19,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 348 transitions. [2023-08-29 23:50:19,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:50:19,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 348 transitions. [2023-08-29 23:50:19,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:19,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:19,522 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:19,522 INFO L175 Difference]: Start difference. First operand has 41 places, 32 transitions, 115 flow. Second operand 3 states and 348 transitions. [2023-08-29 23:50:19,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 30 transitions, 167 flow [2023-08-29 23:50:19,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 166 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:50:19,523 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 112 flow [2023-08-29 23:50:19,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-29 23:50:19,524 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-08-29 23:50:19,524 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 112 flow [2023-08-29 23:50:19,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:19,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:19,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:50:19,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-29 23:50:19,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:19,734 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:50:19,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:19,734 INFO L85 PathProgramCache]: Analyzing trace with hash 555876363, now seen corresponding path program 1 times [2023-08-29 23:50:19,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:19,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362481993] [2023-08-29 23:50:19,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:50:19,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:19,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:19,736 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:50:19,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 23:50:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:50:19,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 23:50:19,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:19,808 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 23:50:19,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 23:50:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:19,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:50:19,826 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:19,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362481993] [2023-08-29 23:50:19,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362481993] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:50:19,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:50:19,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:50:19,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66012506] [2023-08-29 23:50:19,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:50:19,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:50:19,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:19,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:50:19,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:50:19,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 251 [2023-08-29 23:50:19,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:19,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:19,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 251 [2023-08-29 23:50:19,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:50:20,018 INFO L130 PetriNetUnfolder]: 378/603 cut-off events. [2023-08-29 23:50:20,018 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-29 23:50:20,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1247 conditions, 603 events. 378/603 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2769 event pairs, 189 based on Foata normal form. 0/348 useless extension candidates. Maximal degree in co-relation 1230. Up to 581 conditions per place. [2023-08-29 23:50:20,020 INFO L137 encePairwiseOnDemand]: 247/251 looper letters, 22 selfloop transitions, 4 changer transitions 0/28 dead transitions. [2023-08-29 23:50:20,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 28 transitions, 160 flow [2023-08-29 23:50:20,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:50:20,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:50:20,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 438 transitions. [2023-08-29 23:50:20,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4362549800796813 [2023-08-29 23:50:20,028 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 438 transitions. [2023-08-29 23:50:20,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 438 transitions. [2023-08-29 23:50:20,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:50:20,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 438 transitions. [2023-08-29 23:50:20,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:20,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 251.0) internal successors, (1255), 5 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:20,031 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 251.0) internal successors, (1255), 5 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:20,031 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 112 flow. Second operand 4 states and 438 transitions. [2023-08-29 23:50:20,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 28 transitions, 160 flow [2023-08-29 23:50:20,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 28 transitions, 159 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:50:20,032 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 115 flow [2023-08-29 23:50:20,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-08-29 23:50:20,033 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-08-29 23:50:20,033 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 115 flow [2023-08-29 23:50:20,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:20,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:20,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:50:20,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-29 23:50:20,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:20,239 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:50:20,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:20,240 INFO L85 PathProgramCache]: Analyzing trace with hash 555876364, now seen corresponding path program 1 times [2023-08-29 23:50:20,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:20,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667305297] [2023-08-29 23:50:20,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:50:20,243 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:20,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:20,243 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:50:20,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 23:50:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:50:20,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 23:50:20,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:20,339 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:50:20,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:50:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:20,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:50:20,394 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:20,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667305297] [2023-08-29 23:50:20,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667305297] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:50:20,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:50:20,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:50:20,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313783444] [2023-08-29 23:50:20,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:50:20,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:50:20,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:20,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:50:20,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:50:20,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 251 [2023-08-29 23:50:20,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 115 flow. Second operand has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:20,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:20,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 251 [2023-08-29 23:50:20,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:50:20,769 INFO L130 PetriNetUnfolder]: 564/933 cut-off events. [2023-08-29 23:50:20,769 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-08-29 23:50:20,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1931 conditions, 933 events. 564/933 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 4641 event pairs, 177 based on Foata normal form. 0/603 useless extension candidates. Maximal degree in co-relation 1913. Up to 548 conditions per place. [2023-08-29 23:50:20,772 INFO L137 encePairwiseOnDemand]: 246/251 looper letters, 35 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2023-08-29 23:50:20,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 228 flow [2023-08-29 23:50:20,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:50:20,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:50:20,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 551 transitions. [2023-08-29 23:50:20,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43904382470119524 [2023-08-29 23:50:20,774 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 551 transitions. [2023-08-29 23:50:20,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 551 transitions. [2023-08-29 23:50:20,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:50:20,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 551 transitions. [2023-08-29 23:50:20,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:20,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:20,777 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:20,777 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 115 flow. Second operand 5 states and 551 transitions. [2023-08-29 23:50:20,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 228 flow [2023-08-29 23:50:20,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 42 transitions, 223 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:50:20,779 INFO L231 Difference]: Finished difference. Result has 43 places, 29 transitions, 130 flow [2023-08-29 23:50:20,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=130, PETRI_PLACES=43, PETRI_TRANSITIONS=29} [2023-08-29 23:50:20,779 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2023-08-29 23:50:20,779 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 29 transitions, 130 flow [2023-08-29 23:50:20,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:20,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:20,780 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 23:50:20,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-29 23:50:20,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:20,987 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:50:20,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:20,987 INFO L85 PathProgramCache]: Analyzing trace with hash 57742587, now seen corresponding path program 2 times [2023-08-29 23:50:20,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:20,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1627046237] [2023-08-29 23:50:20,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:50:20,988 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:20,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:20,989 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:50:20,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 23:50:21,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:50:21,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:50:21,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:50:21,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:21,089 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:50:21,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:50:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:21,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:50:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:21,616 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:21,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1627046237] [2023-08-29 23:50:21,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1627046237] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:50:21,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:50:21,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 23:50:21,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409764146] [2023-08-29 23:50:21,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:50:21,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:50:21,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:21,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:50:21,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:50:23,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 251 [2023-08-29 23:50:23,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 29 transitions, 130 flow. Second operand has 12 states, 12 states have (on average 105.0) internal successors, (1260), 12 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:23,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:23,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 251 [2023-08-29 23:50:23,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:50:25,760 INFO L130 PetriNetUnfolder]: 1642/2754 cut-off events. [2023-08-29 23:50:25,760 INFO L131 PetriNetUnfolder]: For 290/390 co-relation queries the response was YES. [2023-08-29 23:50:25,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6104 conditions, 2754 events. 1642/2754 cut-off events. For 290/390 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 16894 event pairs, 1040 based on Foata normal form. 106/1969 useless extension candidates. Maximal degree in co-relation 6085. Up to 351 conditions per place. [2023-08-29 23:50:25,769 INFO L137 encePairwiseOnDemand]: 247/251 looper letters, 182 selfloop transitions, 12 changer transitions 0/196 dead transitions. [2023-08-29 23:50:25,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 196 transitions, 1031 flow [2023-08-29 23:50:25,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 23:50:25,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 23:50:25,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1438 transitions. [2023-08-29 23:50:25,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47742363877822047 [2023-08-29 23:50:25,773 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1438 transitions. [2023-08-29 23:50:25,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1438 transitions. [2023-08-29 23:50:25,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:50:25,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1438 transitions. [2023-08-29 23:50:25,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 119.83333333333333) internal successors, (1438), 12 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:25,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 251.0) internal successors, (3263), 13 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:25,780 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 251.0) internal successors, (3263), 13 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:25,780 INFO L175 Difference]: Start difference. First operand has 43 places, 29 transitions, 130 flow. Second operand 12 states and 1438 transitions. [2023-08-29 23:50:25,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 196 transitions, 1031 flow [2023-08-29 23:50:25,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 196 transitions, 996 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 23:50:25,792 INFO L231 Difference]: Finished difference. Result has 58 places, 36 transitions, 219 flow [2023-08-29 23:50:25,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=219, PETRI_PLACES=58, PETRI_TRANSITIONS=36} [2023-08-29 23:50:25,793 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 20 predicate places. [2023-08-29 23:50:25,793 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 36 transitions, 219 flow [2023-08-29 23:50:25,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 105.0) internal successors, (1260), 12 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:25,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:25,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:50:25,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 23:50:26,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:26,002 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:50:26,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:26,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1621259161, now seen corresponding path program 1 times [2023-08-29 23:50:26,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:26,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812862828] [2023-08-29 23:50:26,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:50:26,002 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:26,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:26,003 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:50:26,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 23:50:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:50:26,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 23:50:26,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:26,097 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:50:26,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:50:26,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:26,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:50:26,189 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:26,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812862828] [2023-08-29 23:50:26,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812862828] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:50:26,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:50:26,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 23:50:26,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041892031] [2023-08-29 23:50:26,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:50:26,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:50:26,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:26,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:50:26,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:50:26,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 251 [2023-08-29 23:50:26,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 36 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:26,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:26,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 251 [2023-08-29 23:50:26,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:50:26,856 INFO L130 PetriNetUnfolder]: 1655/2790 cut-off events. [2023-08-29 23:50:26,856 INFO L131 PetriNetUnfolder]: For 348/348 co-relation queries the response was YES. [2023-08-29 23:50:26,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6163 conditions, 2790 events. 1655/2790 cut-off events. For 348/348 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16405 event pairs, 1063 based on Foata normal form. 0/1927 useless extension candidates. Maximal degree in co-relation 6137. Up to 2696 conditions per place. [2023-08-29 23:50:26,865 INFO L137 encePairwiseOnDemand]: 245/251 looper letters, 49 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2023-08-29 23:50:26,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 373 flow [2023-08-29 23:50:26,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:50:26,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:50:26,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 558 transitions. [2023-08-29 23:50:26,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4446215139442231 [2023-08-29 23:50:26,867 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 558 transitions. [2023-08-29 23:50:26,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 558 transitions. [2023-08-29 23:50:26,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:50:26,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 558 transitions. [2023-08-29 23:50:26,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.6) internal successors, (558), 5 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:26,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:26,871 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:26,871 INFO L175 Difference]: Start difference. First operand has 58 places, 36 transitions, 219 flow. Second operand 5 states and 558 transitions. [2023-08-29 23:50:26,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 373 flow [2023-08-29 23:50:26,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 54 transitions, 348 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-29 23:50:26,873 INFO L231 Difference]: Finished difference. Result has 61 places, 38 transitions, 229 flow [2023-08-29 23:50:26,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=61, PETRI_TRANSITIONS=38} [2023-08-29 23:50:26,874 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 23 predicate places. [2023-08-29 23:50:26,874 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 38 transitions, 229 flow [2023-08-29 23:50:26,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:26,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:26,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:50:26,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-29 23:50:27,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:27,082 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:50:27,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:27,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1625249170, now seen corresponding path program 1 times [2023-08-29 23:50:27,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:27,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077115100] [2023-08-29 23:50:27,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:50:27,083 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:27,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:27,084 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:50:27,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 23:50:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:50:27,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 23:50:27,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:27,171 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:50:27,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:50:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:27,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:50:27,244 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:27,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077115100] [2023-08-29 23:50:27,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077115100] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:50:27,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:50:27,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:50:27,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280095493] [2023-08-29 23:50:27,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:50:27,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:50:27,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:27,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:50:27,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:50:27,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 251 [2023-08-29 23:50:27,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 38 transitions, 229 flow. Second operand has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:27,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:27,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 251 [2023-08-29 23:50:27,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:50:27,845 INFO L130 PetriNetUnfolder]: 1988/3574 cut-off events. [2023-08-29 23:50:27,845 INFO L131 PetriNetUnfolder]: For 1334/1458 co-relation queries the response was YES. [2023-08-29 23:50:27,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8905 conditions, 3574 events. 1988/3574 cut-off events. For 1334/1458 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 23903 event pairs, 1029 based on Foata normal form. 124/3482 useless extension candidates. Maximal degree in co-relation 8875. Up to 2274 conditions per place. [2023-08-29 23:50:27,864 INFO L137 encePairwiseOnDemand]: 246/251 looper letters, 41 selfloop transitions, 8 changer transitions 0/51 dead transitions. [2023-08-29 23:50:27,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 51 transitions, 367 flow [2023-08-29 23:50:27,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:50:27,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:50:27,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 549 transitions. [2023-08-29 23:50:27,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43745019920318723 [2023-08-29 23:50:27,866 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 549 transitions. [2023-08-29 23:50:27,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 549 transitions. [2023-08-29 23:50:27,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:50:27,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 549 transitions. [2023-08-29 23:50:27,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:27,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:27,870 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:27,870 INFO L175 Difference]: Start difference. First operand has 61 places, 38 transitions, 229 flow. Second operand 5 states and 549 transitions. [2023-08-29 23:50:27,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 51 transitions, 367 flow [2023-08-29 23:50:27,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 51 transitions, 357 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-29 23:50:27,873 INFO L231 Difference]: Finished difference. Result has 64 places, 39 transitions, 243 flow [2023-08-29 23:50:27,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=243, PETRI_PLACES=64, PETRI_TRANSITIONS=39} [2023-08-29 23:50:27,875 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2023-08-29 23:50:27,875 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 39 transitions, 243 flow [2023-08-29 23:50:27,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:27,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:27,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:50:27,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-29 23:50:28,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:28,083 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:50:28,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:28,083 INFO L85 PathProgramCache]: Analyzing trace with hash -512666904, now seen corresponding path program 1 times [2023-08-29 23:50:28,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:28,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607234430] [2023-08-29 23:50:28,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:50:28,084 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:28,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:28,084 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:50:28,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 23:50:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:50:28,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:50:28,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:28,203 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:50:28,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:50:28,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:50:28,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:50:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:50:28,656 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:28,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607234430] [2023-08-29 23:50:28,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607234430] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:50:28,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:50:28,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 23:50:28,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331018994] [2023-08-29 23:50:28,657 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:50:28,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:50:28,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:28,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:50:28,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:50:30,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 251 [2023-08-29 23:50:30,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 39 transitions, 243 flow. Second operand has 12 states, 12 states have (on average 101.33333333333333) internal successors, (1216), 12 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:30,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:30,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 251 [2023-08-29 23:50:30,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:50:32,104 INFO L130 PetriNetUnfolder]: 4049/7201 cut-off events. [2023-08-29 23:50:32,105 INFO L131 PetriNetUnfolder]: For 3412/3762 co-relation queries the response was YES. [2023-08-29 23:50:32,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19559 conditions, 7201 events. 4049/7201 cut-off events. For 3412/3762 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 51438 event pairs, 437 based on Foata normal form. 854/8055 useless extension candidates. Maximal degree in co-relation 19528. Up to 1549 conditions per place. [2023-08-29 23:50:32,128 INFO L137 encePairwiseOnDemand]: 243/251 looper letters, 95 selfloop transitions, 18 changer transitions 0/114 dead transitions. [2023-08-29 23:50:32,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 114 transitions, 713 flow [2023-08-29 23:50:32,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 23:50:32,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 23:50:32,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1095 transitions. [2023-08-29 23:50:32,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4362549800796813 [2023-08-29 23:50:32,132 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1095 transitions. [2023-08-29 23:50:32,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1095 transitions. [2023-08-29 23:50:32,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:50:32,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1095 transitions. [2023-08-29 23:50:32,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 109.5) internal successors, (1095), 10 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:32,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 251.0) internal successors, (2761), 11 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:32,137 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 251.0) internal successors, (2761), 11 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:32,137 INFO L175 Difference]: Start difference. First operand has 64 places, 39 transitions, 243 flow. Second operand 10 states and 1095 transitions. [2023-08-29 23:50:32,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 114 transitions, 713 flow [2023-08-29 23:50:32,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 114 transitions, 693 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 23:50:32,140 INFO L231 Difference]: Finished difference. Result has 77 places, 47 transitions, 346 flow [2023-08-29 23:50:32,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=346, PETRI_PLACES=77, PETRI_TRANSITIONS=47} [2023-08-29 23:50:32,141 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 39 predicate places. [2023-08-29 23:50:32,141 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 47 transitions, 346 flow [2023-08-29 23:50:32,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.33333333333333) internal successors, (1216), 12 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:32,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:32,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:50:32,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-08-29 23:50:32,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:32,348 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:50:32,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:32,349 INFO L85 PathProgramCache]: Analyzing trace with hash 787792779, now seen corresponding path program 1 times [2023-08-29 23:50:32,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:32,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030491175] [2023-08-29 23:50:32,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:50:32,349 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:32,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:32,351 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:50:32,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-29 23:50:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:50:32,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:50:32,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:32,462 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:50:32,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:50:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:50:32,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:50:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:50:32,963 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:32,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030491175] [2023-08-29 23:50:32,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030491175] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:50:32,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:50:32,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 23:50:32,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075930229] [2023-08-29 23:50:32,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:50:32,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:50:32,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:32,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:50:32,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:50:34,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 251 [2023-08-29 23:50:34,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 47 transitions, 346 flow. Second operand has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:34,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:34,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 251 [2023-08-29 23:50:34,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:50:37,019 INFO L130 PetriNetUnfolder]: 8954/15778 cut-off events. [2023-08-29 23:50:37,019 INFO L131 PetriNetUnfolder]: For 39795/40806 co-relation queries the response was YES. [2023-08-29 23:50:37,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57777 conditions, 15778 events. 8954/15778 cut-off events. For 39795/40806 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 122089 event pairs, 1218 based on Foata normal form. 2235/17995 useless extension candidates. Maximal degree in co-relation 57739. Up to 3997 conditions per place. [2023-08-29 23:50:37,086 INFO L137 encePairwiseOnDemand]: 243/251 looper letters, 132 selfloop transitions, 25 changer transitions 0/159 dead transitions. [2023-08-29 23:50:37,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 159 transitions, 1394 flow [2023-08-29 23:50:37,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 23:50:37,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 23:50:37,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1087 transitions. [2023-08-29 23:50:37,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43306772908366536 [2023-08-29 23:50:37,090 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1087 transitions. [2023-08-29 23:50:37,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1087 transitions. [2023-08-29 23:50:37,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:50:37,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1087 transitions. [2023-08-29 23:50:37,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 108.7) internal successors, (1087), 10 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:37,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 251.0) internal successors, (2761), 11 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:37,095 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 251.0) internal successors, (2761), 11 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:37,095 INFO L175 Difference]: Start difference. First operand has 77 places, 47 transitions, 346 flow. Second operand 10 states and 1087 transitions. [2023-08-29 23:50:37,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 159 transitions, 1394 flow [2023-08-29 23:50:37,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 159 transitions, 1302 flow, removed 38 selfloop flow, removed 3 redundant places. [2023-08-29 23:50:37,133 INFO L231 Difference]: Finished difference. Result has 90 places, 63 transitions, 561 flow [2023-08-29 23:50:37,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=561, PETRI_PLACES=90, PETRI_TRANSITIONS=63} [2023-08-29 23:50:37,133 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 52 predicate places. [2023-08-29 23:50:37,134 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 63 transitions, 561 flow [2023-08-29 23:50:37,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:37,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:37,134 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-29 23:50:37,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-29 23:50:37,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:37,344 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:50:37,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:37,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1270287195, now seen corresponding path program 3 times [2023-08-29 23:50:37,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:37,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070700271] [2023-08-29 23:50:37,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:50:37,345 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:50:37,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:37,346 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:50:37,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-29 23:50:37,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-29 23:50:37,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:50:37,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:50:37,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:37,518 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:50:37,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:50:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:37,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:50:39,475 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:39,475 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:39,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070700271] [2023-08-29 23:50:39,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070700271] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:50:39,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:50:39,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-29 23:50:39,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587660133] [2023-08-29 23:50:39,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:50:39,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 23:50:39,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:39,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 23:50:39,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-29 23:50:47,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 251 [2023-08-29 23:50:47,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 63 transitions, 561 flow. Second operand has 24 states, 24 states have (on average 105.0) internal successors, (2520), 24 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:47,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:47,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 251 [2023-08-29 23:50:47,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:51:02,891 INFO L130 PetriNetUnfolder]: 19982/35274 cut-off events. [2023-08-29 23:51:02,891 INFO L131 PetriNetUnfolder]: For 174740/179239 co-relation queries the response was YES. [2023-08-29 23:51:03,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165475 conditions, 35274 events. 19982/35274 cut-off events. For 174740/179239 co-relation queries the response was YES. Maximal size of possible extension queue 847. Compared 291642 event pairs, 14604 based on Foata normal form. 4301/39575 useless extension candidates. Maximal degree in co-relation 165430. Up to 8821 conditions per place. [2023-08-29 23:51:03,114 INFO L137 encePairwiseOnDemand]: 247/251 looper letters, 916 selfloop transitions, 24 changer transitions 0/943 dead transitions. [2023-08-29 23:51:03,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 943 transitions, 9868 flow [2023-08-29 23:51:03,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-29 23:51:03,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-29 23:51:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2902 transitions. [2023-08-29 23:51:03,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817397078353254 [2023-08-29 23:51:03,120 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2902 transitions. [2023-08-29 23:51:03,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2902 transitions. [2023-08-29 23:51:03,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:51:03,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2902 transitions. [2023-08-29 23:51:03,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 120.91666666666667) internal successors, (2902), 24 states have internal predecessors, (2902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:03,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 251.0) internal successors, (6275), 25 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:03,132 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 251.0) internal successors, (6275), 25 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:03,132 INFO L175 Difference]: Start difference. First operand has 90 places, 63 transitions, 561 flow. Second operand 24 states and 2902 transitions. [2023-08-29 23:51:03,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 943 transitions, 9868 flow [2023-08-29 23:51:03,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 943 transitions, 9569 flow, removed 126 selfloop flow, removed 3 redundant places. [2023-08-29 23:51:03,322 INFO L231 Difference]: Finished difference. Result has 123 places, 76 transitions, 730 flow [2023-08-29 23:51:03,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=730, PETRI_PLACES=123, PETRI_TRANSITIONS=76} [2023-08-29 23:51:03,323 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 85 predicate places. [2023-08-29 23:51:03,323 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 76 transitions, 730 flow [2023-08-29 23:51:03,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 105.0) internal successors, (2520), 24 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:03,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:51:03,324 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2023-08-29 23:51:03,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-08-29 23:51:03,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:51:03,532 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:51:03,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:51:03,533 INFO L85 PathProgramCache]: Analyzing trace with hash -611657009, now seen corresponding path program 2 times [2023-08-29 23:51:03,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:51:03,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803292193] [2023-08-29 23:51:03,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:51:03,533 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:51:03,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:51:03,534 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:51:03,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-29 23:51:03,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:51:03,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:51:03,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:51:03,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:51:03,669 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:51:03,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:51:03,888 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:51:03,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:51:04,747 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:51:04,748 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:51:04,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803292193] [2023-08-29 23:51:04,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803292193] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:51:04,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:51:04,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2023-08-29 23:51:04,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374288270] [2023-08-29 23:51:04,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:51:04,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-29 23:51:04,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:51:04,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-29 23:51:04,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-08-29 23:51:10,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 251 [2023-08-29 23:51:10,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 76 transitions, 730 flow. Second operand has 18 states, 18 states have (on average 100.55555555555556) internal successors, (1810), 18 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:10,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:51:10,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 251 [2023-08-29 23:51:10,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:51:20,110 INFO L130 PetriNetUnfolder]: 20858/37062 cut-off events. [2023-08-29 23:51:20,110 INFO L131 PetriNetUnfolder]: For 169312/171494 co-relation queries the response was YES. [2023-08-29 23:51:20,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169247 conditions, 37062 events. 20858/37062 cut-off events. For 169312/171494 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 309551 event pairs, 9558 based on Foata normal form. 2285/39347 useless extension candidates. Maximal degree in co-relation 169189. Up to 23890 conditions per place. [2023-08-29 23:51:20,388 INFO L137 encePairwiseOnDemand]: 242/251 looper letters, 336 selfloop transitions, 55 changer transitions 0/392 dead transitions. [2023-08-29 23:51:20,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 392 transitions, 3744 flow [2023-08-29 23:51:20,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-29 23:51:20,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-29 23:51:20,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2491 transitions. [2023-08-29 23:51:20,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314914256019401 [2023-08-29 23:51:20,394 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2491 transitions. [2023-08-29 23:51:20,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2491 transitions. [2023-08-29 23:51:20,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:51:20,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2491 transitions. [2023-08-29 23:51:20,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 108.30434782608695) internal successors, (2491), 23 states have internal predecessors, (2491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:20,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 251.0) internal successors, (6024), 24 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:20,402 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 251.0) internal successors, (6024), 24 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:20,403 INFO L175 Difference]: Start difference. First operand has 123 places, 76 transitions, 730 flow. Second operand 23 states and 2491 transitions. [2023-08-29 23:51:20,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 392 transitions, 3744 flow [2023-08-29 23:51:20,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 392 transitions, 3696 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-08-29 23:51:20,655 INFO L231 Difference]: Finished difference. Result has 137 places, 113 transitions, 1211 flow [2023-08-29 23:51:20,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1211, PETRI_PLACES=137, PETRI_TRANSITIONS=113} [2023-08-29 23:51:20,655 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 99 predicate places. [2023-08-29 23:51:20,655 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 113 transitions, 1211 flow [2023-08-29 23:51:20,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 100.55555555555556) internal successors, (1810), 18 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:20,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:51:20,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:51:20,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-29 23:51:20,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:51:20,857 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:51:20,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:51:20,857 INFO L85 PathProgramCache]: Analyzing trace with hash -122731005, now seen corresponding path program 1 times [2023-08-29 23:51:20,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:51:20,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1375123808] [2023-08-29 23:51:20,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:51:20,858 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:51:20,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:51:20,859 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:51:20,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-29 23:51:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:51:20,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 23:51:20,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:51:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:51:20,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:51:20,936 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:51:20,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1375123808] [2023-08-29 23:51:20,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1375123808] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:51:20,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:51:20,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:51:20,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738943112] [2023-08-29 23:51:20,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:51:20,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:51:20,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:51:20,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:51:20,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:51:20,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 251 [2023-08-29 23:51:20,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 113 transitions, 1211 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:20,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:51:20,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 251 [2023-08-29 23:51:20,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:51:25,687 INFO L130 PetriNetUnfolder]: 20096/35738 cut-off events. [2023-08-29 23:51:25,688 INFO L131 PetriNetUnfolder]: For 183706/188390 co-relation queries the response was YES. [2023-08-29 23:51:25,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172367 conditions, 35738 events. 20096/35738 cut-off events. For 183706/188390 co-relation queries the response was YES. Maximal size of possible extension queue 909. Compared 300069 event pairs, 7209 based on Foata normal form. 4100/39756 useless extension candidates. Maximal degree in co-relation 172306. Up to 33858 conditions per place. [2023-08-29 23:51:25,927 INFO L137 encePairwiseOnDemand]: 247/251 looper letters, 121 selfloop transitions, 5 changer transitions 3/133 dead transitions. [2023-08-29 23:51:25,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 133 transitions, 1645 flow [2023-08-29 23:51:25,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:51:25,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:51:25,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2023-08-29 23:51:25,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4860557768924303 [2023-08-29 23:51:25,929 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2023-08-29 23:51:25,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2023-08-29 23:51:25,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:51:25,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2023-08-29 23:51:25,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:25,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:25,931 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:25,931 INFO L175 Difference]: Start difference. First operand has 137 places, 113 transitions, 1211 flow. Second operand 3 states and 366 transitions. [2023-08-29 23:51:25,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 133 transitions, 1645 flow [2023-08-29 23:51:26,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 133 transitions, 1575 flow, removed 22 selfloop flow, removed 9 redundant places. [2023-08-29 23:51:26,371 INFO L231 Difference]: Finished difference. Result has 131 places, 115 transitions, 1182 flow [2023-08-29 23:51:26,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1182, PETRI_PLACES=131, PETRI_TRANSITIONS=115} [2023-08-29 23:51:26,371 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 93 predicate places. [2023-08-29 23:51:26,372 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 115 transitions, 1182 flow [2023-08-29 23:51:26,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:26,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:51:26,372 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:51:26,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-29 23:51:26,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:51:26,577 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:51:26,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:51:26,578 INFO L85 PathProgramCache]: Analyzing trace with hash -268115831, now seen corresponding path program 2 times [2023-08-29 23:51:26,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:51:26,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508397409] [2023-08-29 23:51:26,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:51:26,578 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:51:26,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:51:26,579 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:51:26,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-29 23:51:26,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:51:26,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:51:26,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:51:26,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:51:26,708 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:51:26,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:51:26,921 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:51:26,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:51:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:51:27,825 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:51:27,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508397409] [2023-08-29 23:51:27,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508397409] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:51:27,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:51:27,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2023-08-29 23:51:27,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773014289] [2023-08-29 23:51:27,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:51:27,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-29 23:51:27,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:51:27,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-29 23:51:27,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-08-29 23:51:33,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 251 [2023-08-29 23:51:33,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 115 transitions, 1182 flow. Second operand has 18 states, 18 states have (on average 100.77777777777777) internal successors, (1814), 18 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:33,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:51:33,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 251 [2023-08-29 23:51:33,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:51:43,201 INFO L130 PetriNetUnfolder]: 19663/34993 cut-off events. [2023-08-29 23:51:43,201 INFO L131 PetriNetUnfolder]: For 185357/187761 co-relation queries the response was YES. [2023-08-29 23:51:43,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169719 conditions, 34993 events. 19663/34993 cut-off events. For 185357/187761 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 292214 event pairs, 9686 based on Foata normal form. 1882/36875 useless extension candidates. Maximal degree in co-relation 169660. Up to 22720 conditions per place. [2023-08-29 23:51:43,597 INFO L137 encePairwiseOnDemand]: 242/251 looper letters, 346 selfloop transitions, 53 changer transitions 0/402 dead transitions. [2023-08-29 23:51:43,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 402 transitions, 4492 flow [2023-08-29 23:51:43,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-29 23:51:43,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-29 23:51:43,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2259 transitions. [2023-08-29 23:51:43,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-08-29 23:51:43,601 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2259 transitions. [2023-08-29 23:51:43,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2259 transitions. [2023-08-29 23:51:43,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:51:43,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2259 transitions. [2023-08-29 23:51:43,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 107.57142857142857) internal successors, (2259), 21 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:43,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 251.0) internal successors, (5522), 22 states have internal predecessors, (5522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:43,608 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 251.0) internal successors, (5522), 22 states have internal predecessors, (5522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:43,608 INFO L175 Difference]: Start difference. First operand has 131 places, 115 transitions, 1182 flow. Second operand 21 states and 2259 transitions. [2023-08-29 23:51:43,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 402 transitions, 4492 flow [2023-08-29 23:51:44,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 402 transitions, 4376 flow, removed 52 selfloop flow, removed 2 redundant places. [2023-08-29 23:51:44,116 INFO L231 Difference]: Finished difference. Result has 147 places, 143 transitions, 1525 flow [2023-08-29 23:51:44,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1525, PETRI_PLACES=147, PETRI_TRANSITIONS=143} [2023-08-29 23:51:44,117 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 109 predicate places. [2023-08-29 23:51:44,117 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 143 transitions, 1525 flow [2023-08-29 23:51:44,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 100.77777777777777) internal successors, (1814), 18 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:44,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:51:44,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:51:44,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-29 23:51:44,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:51:44,319 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:51:44,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:51:44,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1302554009, now seen corresponding path program 1 times [2023-08-29 23:51:44,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:51:44,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941601272] [2023-08-29 23:51:44,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:51:44,320 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:51:44,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:51:44,321 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:51:44,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-29 23:51:44,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:51:44,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:51:44,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:51:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:51:44,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:51:44,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:51:44,547 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:51:44,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941601272] [2023-08-29 23:51:44,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941601272] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:51:44,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:51:44,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-29 23:51:44,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838999887] [2023-08-29 23:51:44,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:51:44,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 23:51:44,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:51:44,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 23:51:44,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-08-29 23:51:44,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 251 [2023-08-29 23:51:44,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 143 transitions, 1525 flow. Second operand has 13 states, 13 states have (on average 106.46153846153847) internal successors, (1384), 13 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:44,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:51:44,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 251 [2023-08-29 23:51:44,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:51:49,345 INFO L130 PetriNetUnfolder]: 20330/35994 cut-off events. [2023-08-29 23:51:49,346 INFO L131 PetriNetUnfolder]: For 179565/179565 co-relation queries the response was YES. [2023-08-29 23:51:49,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179048 conditions, 35994 events. 20330/35994 cut-off events. For 179565/179565 co-relation queries the response was YES. Maximal size of possible extension queue 837. Compared 295186 event pairs, 754 based on Foata normal form. 670/36664 useless extension candidates. Maximal degree in co-relation 178988. Up to 10994 conditions per place. [2023-08-29 23:51:49,608 INFO L137 encePairwiseOnDemand]: 241/251 looper letters, 174 selfloop transitions, 192 changer transitions 0/366 dead transitions. [2023-08-29 23:51:49,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 366 transitions, 4346 flow [2023-08-29 23:51:49,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 23:51:49,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 23:51:49,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1673 transitions. [2023-08-29 23:51:49,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44435590969455513 [2023-08-29 23:51:49,611 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1673 transitions. [2023-08-29 23:51:49,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1673 transitions. [2023-08-29 23:51:49,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:51:49,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1673 transitions. [2023-08-29 23:51:49,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 111.53333333333333) internal successors, (1673), 15 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:49,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 251.0) internal successors, (4016), 16 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:49,616 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 251.0) internal successors, (4016), 16 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:49,616 INFO L175 Difference]: Start difference. First operand has 147 places, 143 transitions, 1525 flow. Second operand 15 states and 1673 transitions. [2023-08-29 23:51:49,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 366 transitions, 4346 flow [2023-08-29 23:51:50,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 366 transitions, 4272 flow, removed 28 selfloop flow, removed 5 redundant places. [2023-08-29 23:51:50,616 INFO L231 Difference]: Finished difference. Result has 166 places, 280 transitions, 3706 flow [2023-08-29 23:51:50,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=1479, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3706, PETRI_PLACES=166, PETRI_TRANSITIONS=280} [2023-08-29 23:51:50,616 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 128 predicate places. [2023-08-29 23:51:50,617 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 280 transitions, 3706 flow [2023-08-29 23:51:50,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 106.46153846153847) internal successors, (1384), 13 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:50,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:51:50,617 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2023-08-29 23:51:50,627 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 (20)] Forceful destruction successful, exit code 0 [2023-08-29 23:51:50,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:51:50,817 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:51:50,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:51:50,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1085014400, now seen corresponding path program 3 times [2023-08-29 23:51:50,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:51:50,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13062189] [2023-08-29 23:51:50,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:51:50,818 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:51:50,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:51:50,819 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:51:50,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-29 23:51:51,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-29 23:51:51,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:51:51,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:51:51,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:51:51,066 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:51:51,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:51:51,301 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 23:51:51,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:51:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 23:51:52,224 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:51:52,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13062189] [2023-08-29 23:51:52,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13062189] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:51:52,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:51:52,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-29 23:51:52,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963091235] [2023-08-29 23:51:52,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:51:52,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-29 23:51:52,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:51:52,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-29 23:51:52,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-08-29 23:51:57,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 251 [2023-08-29 23:51:57,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 280 transitions, 3706 flow. Second operand has 18 states, 18 states have (on average 101.55555555555556) internal successors, (1828), 18 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:57,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:51:57,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 251 [2023-08-29 23:51:57,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:52:15,746 INFO L130 PetriNetUnfolder]: 45839/84757 cut-off events. [2023-08-29 23:52:15,746 INFO L131 PetriNetUnfolder]: For 755181/764048 co-relation queries the response was YES. [2023-08-29 23:52:16,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492074 conditions, 84757 events. 45839/84757 cut-off events. For 755181/764048 co-relation queries the response was YES. Maximal size of possible extension queue 1718. Compared 804090 event pairs, 5807 based on Foata normal form. 9297/93939 useless extension candidates. Maximal degree in co-relation 492004. Up to 19635 conditions per place. [2023-08-29 23:52:16,665 INFO L137 encePairwiseOnDemand]: 244/251 looper letters, 640 selfloop transitions, 57 changer transitions 0/714 dead transitions. [2023-08-29 23:52:16,666 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 714 transitions, 10434 flow [2023-08-29 23:52:16,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 23:52:16,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 23:52:16,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1669 transitions. [2023-08-29 23:52:16,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44329349269588314 [2023-08-29 23:52:16,669 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1669 transitions. [2023-08-29 23:52:16,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1669 transitions. [2023-08-29 23:52:16,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:52:16,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1669 transitions. [2023-08-29 23:52:16,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 111.26666666666667) internal successors, (1669), 15 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:16,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 251.0) internal successors, (4016), 16 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:16,673 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 251.0) internal successors, (4016), 16 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:16,674 INFO L175 Difference]: Start difference. First operand has 166 places, 280 transitions, 3706 flow. Second operand 15 states and 1669 transitions. [2023-08-29 23:52:16,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 714 transitions, 10434 flow [2023-08-29 23:52:22,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 714 transitions, 10064 flow, removed 161 selfloop flow, removed 3 redundant places. [2023-08-29 23:52:22,265 INFO L231 Difference]: Finished difference. Result has 185 places, 301 transitions, 3800 flow [2023-08-29 23:52:22,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=3372, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3800, PETRI_PLACES=185, PETRI_TRANSITIONS=301} [2023-08-29 23:52:22,266 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 147 predicate places. [2023-08-29 23:52:22,266 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 301 transitions, 3800 flow [2023-08-29 23:52:22,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 101.55555555555556) internal successors, (1828), 18 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:22,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:52:22,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:52:22,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-29 23:52:22,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:52:22,467 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:52:22,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:52:22,467 INFO L85 PathProgramCache]: Analyzing trace with hash -988753028, now seen corresponding path program 1 times [2023-08-29 23:52:22,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:52:22,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117802719] [2023-08-29 23:52:22,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:52:22,468 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:52:22,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:52:22,469 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:52:22,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-29 23:52:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:52:22,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:52:22,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:52:22,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:52:22,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:52:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:52:22,689 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:52:22,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117802719] [2023-08-29 23:52:22,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [117802719] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:52:22,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:52:22,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-29 23:52:22,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766866226] [2023-08-29 23:52:22,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:52:22,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 23:52:22,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:52:22,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 23:52:22,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-08-29 23:52:22,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 251 [2023-08-29 23:52:22,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 301 transitions, 3800 flow. Second operand has 13 states, 13 states have (on average 106.3076923076923) internal successors, (1382), 13 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:22,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:52:22,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 251 [2023-08-29 23:52:22,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:52:38,196 INFO L130 PetriNetUnfolder]: 46898/86196 cut-off events. [2023-08-29 23:52:38,197 INFO L131 PetriNetUnfolder]: For 658358/658358 co-relation queries the response was YES. [2023-08-29 23:52:38,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519133 conditions, 86196 events. 46898/86196 cut-off events. For 658358/658358 co-relation queries the response was YES. Maximal size of possible extension queue 1666. Compared 807639 event pairs, 3421 based on Foata normal form. 510/86706 useless extension candidates. Maximal degree in co-relation 519054. Up to 35469 conditions per place. [2023-08-29 23:52:39,203 INFO L137 encePairwiseOnDemand]: 241/251 looper letters, 280 selfloop transitions, 373 changer transitions 0/653 dead transitions. [2023-08-29 23:52:39,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 653 transitions, 9615 flow [2023-08-29 23:52:39,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 23:52:39,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 23:52:39,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1662 transitions. [2023-08-29 23:52:39,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44143426294820715 [2023-08-29 23:52:39,206 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1662 transitions. [2023-08-29 23:52:39,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1662 transitions. [2023-08-29 23:52:39,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:52:39,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1662 transitions. [2023-08-29 23:52:39,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 110.8) internal successors, (1662), 15 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:39,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 251.0) internal successors, (4016), 16 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:39,210 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 251.0) internal successors, (4016), 16 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:39,210 INFO L175 Difference]: Start difference. First operand has 185 places, 301 transitions, 3800 flow. Second operand 15 states and 1662 transitions. [2023-08-29 23:52:39,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 653 transitions, 9615 flow [2023-08-29 23:52:44,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 653 transitions, 9404 flow, removed 33 selfloop flow, removed 5 redundant places. [2023-08-29 23:52:44,668 INFO L231 Difference]: Finished difference. Result has 205 places, 533 transitions, 8320 flow [2023-08-29 23:52:44,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=3722, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8320, PETRI_PLACES=205, PETRI_TRANSITIONS=533} [2023-08-29 23:52:44,669 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 167 predicate places. [2023-08-29 23:52:44,669 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 533 transitions, 8320 flow [2023-08-29 23:52:44,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 106.3076923076923) internal successors, (1382), 13 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:44,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:52:44,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:52:44,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-29 23:52:44,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:52:44,875 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:52:44,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:52:44,876 INFO L85 PathProgramCache]: Analyzing trace with hash 784803776, now seen corresponding path program 2 times [2023-08-29 23:52:44,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:52:44,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047676374] [2023-08-29 23:52:44,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:52:44,876 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:52:44,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:52:44,877 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:52:44,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-29 23:52:44,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:52:44,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:52:44,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 23:52:44,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:52:45,018 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:52:45,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:52:45,039 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 13 treesize of output 9 [2023-08-29 23:52:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:52:45,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:52:45,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:52:45,111 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:52:45,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1047676374] [2023-08-29 23:52:45,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1047676374] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-29 23:52:45,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 23:52:45,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-08-29 23:52:45,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464759376] [2023-08-29 23:52:45,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:52:45,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:52:45,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:52:45,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:52:45,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:52:45,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 251 [2023-08-29 23:52:45,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 533 transitions, 8320 flow. Second operand has 5 states, 5 states have (on average 103.2) internal successors, (516), 5 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:45,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:52:45,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 251 [2023-08-29 23:52:45,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:53:02,667 INFO L130 PetriNetUnfolder]: 44509/81779 cut-off events. [2023-08-29 23:53:02,668 INFO L131 PetriNetUnfolder]: For 909618/915039 co-relation queries the response was YES. [2023-08-29 23:53:03,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559108 conditions, 81779 events. 44509/81779 cut-off events. For 909618/915039 co-relation queries the response was YES. Maximal size of possible extension queue 1620. Compared 766443 event pairs, 18530 based on Foata normal form. 2691/84350 useless extension candidates. Maximal degree in co-relation 559018. Up to 58306 conditions per place. [2023-08-29 23:53:03,984 INFO L137 encePairwiseOnDemand]: 244/251 looper letters, 296 selfloop transitions, 249 changer transitions 0/566 dead transitions. [2023-08-29 23:53:03,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 566 transitions, 9873 flow [2023-08-29 23:53:03,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:53:03,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:53:03,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 531 transitions. [2023-08-29 23:53:03,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4231075697211155 [2023-08-29 23:53:03,986 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 531 transitions. [2023-08-29 23:53:03,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 531 transitions. [2023-08-29 23:53:03,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:53:03,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 531 transitions. [2023-08-29 23:53:03,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.2) internal successors, (531), 5 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:03,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:03,988 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:03,988 INFO L175 Difference]: Start difference. First operand has 205 places, 533 transitions, 8320 flow. Second operand 5 states and 531 transitions. [2023-08-29 23:53:03,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 566 transitions, 9873 flow [2023-08-29 23:53:27,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 566 transitions, 9272 flow, removed 238 selfloop flow, removed 4 redundant places. [2023-08-29 23:53:27,541 INFO L231 Difference]: Finished difference. Result has 206 places, 533 transitions, 8474 flow [2023-08-29 23:53:27,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=7727, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=8474, PETRI_PLACES=206, PETRI_TRANSITIONS=533} [2023-08-29 23:53:27,542 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 168 predicate places. [2023-08-29 23:53:27,542 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 533 transitions, 8474 flow [2023-08-29 23:53:27,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.2) internal successors, (516), 5 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:27,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:53:27,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:53:27,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-29 23:53:27,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:53:27,743 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:53:27,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:53:27,744 INFO L85 PathProgramCache]: Analyzing trace with hash 528147135, now seen corresponding path program 2 times [2023-08-29 23:53:27,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:53:27,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1263578963] [2023-08-29 23:53:27,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:53:27,744 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:53:27,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:53:27,745 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:53:27,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-29 23:53:27,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:53:27,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:53:27,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 23:53:27,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:53:27,888 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:53:27,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:53:27,905 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 13 treesize of output 9 [2023-08-29 23:53:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:53:27,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:53:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:53:27,978 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:53:27,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1263578963] [2023-08-29 23:53:27,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1263578963] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-29 23:53:27,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 23:53:27,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-08-29 23:53:27,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321749899] [2023-08-29 23:53:27,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:53:27,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:53:27,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:53:27,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:53:27,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:53:28,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 251 [2023-08-29 23:53:28,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 533 transitions, 8474 flow. Second operand has 5 states, 5 states have (on average 103.2) internal successors, (516), 5 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:28,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:53:28,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 251 [2023-08-29 23:53:28,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:53:45,577 INFO L130 PetriNetUnfolder]: 44719/80641 cut-off events. [2023-08-29 23:53:45,578 INFO L131 PetriNetUnfolder]: For 1024221/1024987 co-relation queries the response was YES. [2023-08-29 23:53:46,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545759 conditions, 80641 events. 44719/80641 cut-off events. For 1024221/1024987 co-relation queries the response was YES. Maximal size of possible extension queue 1539. Compared 737089 event pairs, 13326 based on Foata normal form. 440/81062 useless extension candidates. Maximal degree in co-relation 545668. Up to 43550 conditions per place. [2023-08-29 23:53:46,683 INFO L137 encePairwiseOnDemand]: 244/251 looper letters, 415 selfloop transitions, 160 changer transitions 0/595 dead transitions. [2023-08-29 23:53:46,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 595 transitions, 10802 flow [2023-08-29 23:53:46,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:53:46,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:53:46,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 531 transitions. [2023-08-29 23:53:46,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4231075697211155 [2023-08-29 23:53:46,685 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 531 transitions. [2023-08-29 23:53:46,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 531 transitions. [2023-08-29 23:53:46,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:53:46,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 531 transitions. [2023-08-29 23:53:46,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.2) internal successors, (531), 5 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:46,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:46,687 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:46,687 INFO L175 Difference]: Start difference. First operand has 206 places, 533 transitions, 8474 flow. Second operand 5 states and 531 transitions. [2023-08-29 23:53:46,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 595 transitions, 10802 flow [2023-08-29 23:54:04,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 595 transitions, 10181 flow, removed 44 selfloop flow, removed 8 redundant places. [2023-08-29 23:54:04,757 INFO L231 Difference]: Finished difference. Result has 203 places, 533 transitions, 8409 flow [2023-08-29 23:54:04,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=7929, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=8409, PETRI_PLACES=203, PETRI_TRANSITIONS=533} [2023-08-29 23:54:04,758 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 165 predicate places. [2023-08-29 23:54:04,758 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 533 transitions, 8409 flow [2023-08-29 23:54:04,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.2) internal successors, (516), 5 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:04,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:54:04,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:54:04,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-29 23:54:04,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:54:04,959 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:54:04,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:54:04,959 INFO L85 PathProgramCache]: Analyzing trace with hash 299064887, now seen corresponding path program 1 times [2023-08-29 23:54:04,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:54:04,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197904662] [2023-08-29 23:54:04,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:54:04,959 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:54:04,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:54:04,960 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:54:04,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-29 23:54:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:54:05,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-29 23:54:05,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:54:05,104 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 [2023-08-29 23:54:05,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 23:54:05,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 32 treesize of output 28 [2023-08-29 23:54:05,265 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 23:54:05,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 46 [2023-08-29 23:54:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:54:05,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:54:05,641 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv3 32) c_~A~0.offset)) (.cse3 (bvadd (_ bv2 32) c_~A~0.offset)) (.cse4 (bvadd c_~A~0.offset (_ bv1 32)))) (and (forall ((v_ArrVal_556 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_556) c_~A~0.base))) (concat (concat (concat (select .cse1 .cse2) (select .cse1 .cse3)) (select .cse1 .cse4)) (select .cse1 c_~A~0.offset))))) (or (= (bvadd |c_thread1Thread1of1ForFork1_~tmp~0#1| (bvneg .cse0)) (_ bv0 32)) (not (bvsle |c_thread1Thread1of1ForFork1_~tmp~0#1| (bvadd .cse0 (_ bv2147483647 32))))))) (forall ((v_ArrVal_556 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse5 (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_556) c_~A~0.base))) (concat (concat (concat (select .cse6 .cse2) (select .cse6 .cse3)) (select .cse6 .cse4)) (select .cse6 c_~A~0.offset))))) (or (= (bvadd |c_thread1Thread1of1ForFork1_~tmp~0#1| (bvneg .cse5)) (_ bv0 32)) (not (bvsge .cse5 (_ bv0 32)))))))) is different from false [2023-08-29 23:54:05,683 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (let ((.cse8 (select |c_#memory_int| c_~A~0.base)) (.cse9 (bvmul (_ bv4 32) |c_thread1Thread1of1ForFork1_~i~0#1|))) (concat (concat (concat (select .cse8 (bvadd .cse9 (_ bv3 32) c_~A~0.offset)) (select .cse8 (bvadd .cse9 (_ bv2 32) c_~A~0.offset))) (select .cse8 (bvadd .cse9 c_~A~0.offset (_ bv1 32)))) (select .cse8 (bvadd .cse9 c_~A~0.offset))))) (.cse3 (bvadd (_ bv3 32) c_~A~0.offset)) (.cse4 (bvadd (_ bv2 32) c_~A~0.offset)) (.cse5 (bvadd c_~A~0.offset (_ bv1 32)))) (and (forall ((v_ArrVal_556 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse1 (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_556) c_~A~0.base))) (concat (concat (concat (select .cse2 .cse3) (select .cse2 .cse4)) (select .cse2 .cse5)) (select .cse2 c_~A~0.offset))))) (or (= (bvadd c_~counter~0 .cse0 (bvneg .cse1)) (_ bv0 32)) (not (bvsge .cse1 (_ bv0 32)))))) (forall ((v_ArrVal_556 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse6 (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_556) c_~A~0.base))) (concat (concat (concat (select .cse7 .cse3) (select .cse7 .cse4)) (select .cse7 .cse5)) (select .cse7 c_~A~0.offset))))) (or (= (bvadd c_~counter~0 .cse0 (bvneg .cse6)) (_ bv0 32)) (not (bvsle (bvadd c_~counter~0 .cse0) (bvadd .cse6 (_ bv2147483647 32))))))))) is different from false [2023-08-29 23:54:05,718 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (bvadd (_ bv3 32) c_~A~0.offset)) (.cse4 (bvadd (_ bv2 32) c_~A~0.offset)) (.cse5 (bvadd c_~A~0.offset (_ bv1 32)))) (let ((.cse1 (let ((.cse8 (select |c_#memory_int| c_~A~0.base))) (concat (concat (concat (select .cse8 .cse3) (select .cse8 .cse4)) (select .cse8 .cse5)) (select .cse8 c_~A~0.offset))))) (and (forall ((v_ArrVal_556 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_556) c_~A~0.base))) (concat (concat (concat (select .cse2 .cse3) (select .cse2 .cse4)) (select .cse2 .cse5)) (select .cse2 c_~A~0.offset))))) (or (not (bvsge .cse0 (_ bv0 32))) (= (bvadd c_~counter~0 .cse1 (bvneg .cse0)) (_ bv0 32))))) (forall ((v_ArrVal_556 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse6 (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_556) c_~A~0.base))) (concat (concat (concat (select .cse7 .cse3) (select .cse7 .cse4)) (select .cse7 .cse5)) (select .cse7 c_~A~0.offset))))) (or (not (bvsle (bvadd c_~counter~0 .cse1) (bvadd .cse6 (_ bv2147483647 32)))) (= (bvadd c_~counter~0 .cse1 (bvneg .cse6)) (_ bv0 32)))))))) is different from false [2023-08-29 23:54:05,766 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 23:54:05,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 996 treesize of output 732 [2023-08-29 23:54:05,783 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 23:54:05,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 356 treesize of output 300 [2023-08-29 23:54:05,798 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 23:54:05,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 247 treesize of output 163 [2023-08-29 23:54:06,068 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 23:54:06,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 628 treesize of output 474 [2023-08-29 23:54:06,077 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 23:54:06,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 288 treesize of output 232 [2023-08-29 23:54:06,088 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 23:54:06,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 123 [2023-08-29 23:54:06,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-08-29 23:54:06,648 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:54:06,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [197904662] [2023-08-29 23:54:06,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [197904662] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:54:06,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:54:06,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2023-08-29 23:54:06,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640077030] [2023-08-29 23:54:06,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:54:06,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-29 23:54:06,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:54:06,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-29 23:54:06,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=223, Unknown=3, NotChecked=96, Total=380 [2023-08-29 23:54:06,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 251 [2023-08-29 23:54:06,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 533 transitions, 8409 flow. Second operand has 20 states, 20 states have (on average 75.9) internal successors, (1518), 20 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:06,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:54:06,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 251 [2023-08-29 23:54:06,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:54:33,121 INFO L130 PetriNetUnfolder]: 62976/112593 cut-off events. [2023-08-29 23:54:33,121 INFO L131 PetriNetUnfolder]: For 1294484/1294484 co-relation queries the response was YES. [2023-08-29 23:54:34,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 786344 conditions, 112593 events. 62976/112593 cut-off events. For 1294484/1294484 co-relation queries the response was YES. Maximal size of possible extension queue 2180. Compared 1063178 event pairs, 12744 based on Foata normal form. 172/112765 useless extension candidates. Maximal degree in co-relation 786257. Up to 82905 conditions per place. [2023-08-29 23:54:34,785 INFO L137 encePairwiseOnDemand]: 240/251 looper letters, 738 selfloop transitions, 275 changer transitions 9/1022 dead transitions. [2023-08-29 23:54:34,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 1022 transitions, 17737 flow [2023-08-29 23:54:34,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-29 23:54:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-29 23:54:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1635 transitions. [2023-08-29 23:54:34,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3256972111553785 [2023-08-29 23:54:34,788 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1635 transitions. [2023-08-29 23:54:34,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1635 transitions. [2023-08-29 23:54:34,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:54:34,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1635 transitions. [2023-08-29 23:54:34,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 81.75) internal successors, (1635), 20 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:34,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 251.0) internal successors, (5271), 21 states have internal predecessors, (5271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:34,793 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 251.0) internal successors, (5271), 21 states have internal predecessors, (5271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:34,793 INFO L175 Difference]: Start difference. First operand has 203 places, 533 transitions, 8409 flow. Second operand 20 states and 1635 transitions. [2023-08-29 23:54:34,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 1022 transitions, 17737 flow [2023-08-29 23:55:32,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 1022 transitions, 16665 flow, removed 49 selfloop flow, removed 11 redundant places. [2023-08-29 23:55:32,788 INFO L231 Difference]: Finished difference. Result has 224 places, 744 transitions, 12295 flow [2023-08-29 23:55:32,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=7789, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=12295, PETRI_PLACES=224, PETRI_TRANSITIONS=744} [2023-08-29 23:55:32,788 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 186 predicate places. [2023-08-29 23:55:32,788 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 744 transitions, 12295 flow [2023-08-29 23:55:32,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 75.9) internal successors, (1518), 20 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:32,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:32,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:55:32,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-29 23:55:32,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:32,993 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 23:55:32,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:32,993 INFO L85 PathProgramCache]: Analyzing trace with hash 581565303, now seen corresponding path program 2 times [2023-08-29 23:55:32,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:55:32,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [325844285] [2023-08-29 23:55:32,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:55:32,994 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:32,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:55:32,995 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:55:32,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-29 23:55:33,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:55:33,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-08-29 23:55:33,124 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 23:55:33,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 23:55:33,254 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-08-29 23:55:33,256 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 23:55:33,257 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (21 of 22 remaining) [2023-08-29 23:55:33,265 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 22 remaining) [2023-08-29 23:55:33,265 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 22 remaining) [2023-08-29 23:55:33,265 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 22 remaining) [2023-08-29 23:55:33,265 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 22 remaining) [2023-08-29 23:55:33,265 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 22 remaining) [2023-08-29 23:55:33,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 22 remaining) [2023-08-29 23:55:33,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 22 remaining) [2023-08-29 23:55:33,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 22 remaining) [2023-08-29 23:55:33,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 22 remaining) [2023-08-29 23:55:33,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 22 remaining) [2023-08-29 23:55:33,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 22 remaining) [2023-08-29 23:55:33,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 22 remaining) [2023-08-29 23:55:33,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 22 remaining) [2023-08-29 23:55:33,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 22 remaining) [2023-08-29 23:55:33,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK (6 of 22 remaining) [2023-08-29 23:55:33,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 22 remaining) [2023-08-29 23:55:33,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 22 remaining) [2023-08-29 23:55:33,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 22 remaining) [2023-08-29 23:55:33,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 22 remaining) [2023-08-29 23:55:33,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 22 remaining) [2023-08-29 23:55:33,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 22 remaining) [2023-08-29 23:55:33,276 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 (26)] Forceful destruction successful, exit code 0 [2023-08-29 23:55:33,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:33,476 INFO L445 BasicCegarLoop]: Path program histogram: [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:55:33,480 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-29 23:55:33,480 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-29 23:55:33,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 11:55:33 BasicIcfg [2023-08-29 23:55:33,511 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-29 23:55:33,512 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-29 23:55:33,512 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-29 23:55:33,512 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-29 23:55:33,512 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:50:05" (3/4) ... [2023-08-29 23:55:33,514 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-29 23:55:33,514 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-29 23:55:33,514 INFO L158 Benchmark]: Toolchain (without parser) took 328528.38ms. Allocated memory was 69.2MB in the beginning and 13.3GB in the end (delta: 13.2GB). Free memory was 45.1MB in the beginning and 6.3GB in the end (delta: -6.2GB). Peak memory consumption was 7.0GB. Max. memory is 16.1GB. [2023-08-29 23:55:33,515 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 69.2MB. Free memory is still 47.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 23:55:33,515 INFO L158 Benchmark]: CACSL2BoogieTranslator took 281.35ms. Allocated memory is still 69.2MB. Free memory was 44.9MB in the beginning and 31.3MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-08-29 23:55:33,515 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.87ms. Allocated memory is still 69.2MB. Free memory was 31.3MB in the beginning and 29.0MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 23:55:33,515 INFO L158 Benchmark]: Boogie Preprocessor took 45.87ms. Allocated memory is still 69.2MB. Free memory was 29.0MB in the beginning and 27.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 23:55:33,515 INFO L158 Benchmark]: RCFGBuilder took 567.21ms. Allocated memory was 69.2MB in the beginning and 102.8MB in the end (delta: 33.6MB). Free memory was 27.3MB in the beginning and 47.3MB in the end (delta: -20.0MB). Peak memory consumption was 14.1MB. Max. memory is 16.1GB. [2023-08-29 23:55:33,516 INFO L158 Benchmark]: TraceAbstraction took 327580.24ms. Allocated memory was 102.8MB in the beginning and 13.3GB in the end (delta: 13.2GB). Free memory was 46.8MB in the beginning and 6.3GB in the end (delta: -6.2GB). Peak memory consumption was 6.9GB. Max. memory is 16.1GB. [2023-08-29 23:55:33,517 INFO L158 Benchmark]: Witness Printer took 2.48ms. Allocated memory is still 13.3GB. Free memory was 6.3GB in the beginning and 6.3GB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 23:55:33,518 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 69.2MB. Free memory is still 47.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 281.35ms. Allocated memory is still 69.2MB. Free memory was 44.9MB in the beginning and 31.3MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.87ms. Allocated memory is still 69.2MB. Free memory was 31.3MB in the beginning and 29.0MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.87ms. Allocated memory is still 69.2MB. Free memory was 29.0MB in the beginning and 27.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 567.21ms. Allocated memory was 69.2MB in the beginning and 102.8MB in the end (delta: 33.6MB). Free memory was 27.3MB in the beginning and 47.3MB in the end (delta: -20.0MB). Peak memory consumption was 14.1MB. Max. memory is 16.1GB. * TraceAbstraction took 327580.24ms. Allocated memory was 102.8MB in the beginning and 13.3GB in the end (delta: 13.2GB). Free memory was 46.8MB in the beginning and 6.3GB in the end (delta: -6.2GB). Peak memory consumption was 6.9GB. Max. memory is 16.1GB. * Witness Printer took 2.48ms. Allocated memory is still 13.3GB. Free memory was 6.3GB in the beginning and 6.3GB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8.9s, 119 PlacesBefore, 38 PlacesAfterwards, 121 TransitionsBefore, 34 TransitionsAfterwards, 936 CoEnabledTransitionPairs, 7 FixpointIterations, 72 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 11 TrivialYvCompositions, 4 ConcurrentYvCompositions, 6 ChoiceCompositions, 124 TotalNumberOfCompositions, 1568 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1269, independent: 1232, independent conditional: 0, independent unconditional: 1232, dependent: 37, dependent conditional: 0, dependent unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 468, independent: 458, independent conditional: 0, independent unconditional: 458, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1269, independent: 774, independent conditional: 0, independent unconditional: 774, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 468, unknown conditional: 0, unknown unconditional: 468] , Statistics on independence cache: Total cache size (in pairs): 76, Positive cache size: 73, Positive conditional cache size: 0, Positive unconditional cache size: 73, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 87]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 87. Possible FailurePath: [L41] 0 int* A; [L42] 0 int counter, N; [L75] 0 pthread_t t1, t2; [L77] 0 N = __VERIFIER_nondet_int() [L78] CALL, EXPR 0 create_fresh_int_array(N) [L93] CALL 0 assume_abort_if_not(size >= 0) [L38] COND FALSE 0 !(!cond) [L93] RET 0 assume_abort_if_not(size >= 0) [L94] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L38] COND FALSE 0 !(!cond) [L94] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L96] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L97] 0 int i = 0; VAL [A={0:0}, N=1, \old(size)=1, arr={5:0}, counter=0, i=0, size=1] [L97] COND TRUE 0 i < size [L98] 0 arr[i] = __VERIFIER_nondet_int() [L97] 0 i++ VAL [A={0:0}, N=1, \old(size)=1, arr={5:0}, counter=0, i=1, size=1] [L97] COND FALSE 0 !(i < size) [L100] 0 return arr; [L78] RET, EXPR 0 create_fresh_int_array(N) [L78] 0 A = create_fresh_int_array(N) [L81] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={5:0}, N=1, counter=0, pthread_create(&t1, 0, thread1, 0)=1, t1={13:0}, t2={12:0}] [L82] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [A={5:0}, N=1, counter=0, pthread_create(&t2, 0, thread2, 0)=2, t1={13:0}, t2={12:0}] [L83] 0 \read(t1) VAL [A={5:0}, N=1, \read(t1)=1, counter=0, t1={13:0}, t2={12:0}] [L49] 1 int i=0; VAL [A={5:0}, N=1, counter=0, i=0] [L49] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L38] COND FALSE 1 !(!cond) [L110] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L111] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L38] COND FALSE 1 !(!cond) [L111] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L112] 1 return a + b; [L51] RET, EXPR 1 plus(counter, A[i]) [L51] 1 int tmp = plus(counter, A[i]); [L62] 2 int i=0; VAL [A={5:0}, N=1, counter=0, i=0] [L62] COND TRUE 2 i= b - 2147483648) [L38] COND FALSE 2 !(!cond) [L104] RET 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L105] CALL 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L38] COND FALSE 2 !(!cond) [L105] RET 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L106] 2 return a - b; [L64] RET, EXPR 2 minus(counter, A[i]) [L64] 2 int tmp = minus(counter, A[i]); [L67] 2 counter = tmp [L62] 2 i++ VAL [A={5:0}, N=1, counter=-2, i=1, tmp=-2] [L54] 1 counter = tmp [L49] 1 i++ VAL [A={5:0}, N=1, counter=2, i=1, tmp=2] [L49] COND FALSE 1 !(i