./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.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 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:01:17,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:01:17,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:01:17,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:01:17,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:01:17,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:01:17,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:01:17,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:01:17,595 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:01:17,600 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:01:17,601 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:01:17,603 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:01:17,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:01:17,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:01:17,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:01:17,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:01:17,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:01:17,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:01:17,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:01:17,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:01:17,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:01:17,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:01:17,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:01:17,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:01:17,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:01:17,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:01:17,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:01:17,640 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:01:17,640 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:01:17,641 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:01:17,642 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:01:17,643 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:01:17,645 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:01:17,646 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:01:17,647 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:01:17,647 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:01:17,647 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:01:17,648 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:01:17,648 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:01:17,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:01:17,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:01:17,651 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:01:17,685 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:01:17,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:01:17,686 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:01:17,686 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:01:17,687 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:01:17,687 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:01:17,688 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:01:17,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:01:17,688 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:01:17,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:01:17,689 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:01:17,690 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:01:17,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:01:17,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:01:17,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:01:17,690 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:01:17,690 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:01:17,691 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:01:17,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:01:17,691 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:01:17,691 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:01:17,691 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:01:17,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:01:17,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:01:17,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:01:17,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:01:17,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:01:17,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:01:17,693 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:01:17,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:01:17,693 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:01:17,694 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:01:17,694 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:01:17,694 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:01:17,694 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:01:18,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:01:18,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:01:18,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:01:18,086 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:01:18,086 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:01:18,087 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2023-08-30 06:01:19,324 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:01:19,506 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:01:19,507 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2023-08-30 06:01:19,514 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e80becf7/043d6b8f51854661884ddaca51d564e0/FLAGdc0b9ae4d [2023-08-30 06:01:19,527 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e80becf7/043d6b8f51854661884ddaca51d564e0 [2023-08-30 06:01:19,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:01:19,531 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:01:19,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:01:19,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:01:19,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:01:19,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:01:19" (1/1) ... [2023-08-30 06:01:19,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a1e552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:19, skipping insertion in model container [2023-08-30 06:01:19,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:01:19" (1/1) ... [2023-08-30 06:01:19,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:01:19,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:01:19,783 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-buffer-mult-alt.wvr.c[4293,4306] [2023-08-30 06:01:19,803 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:01:19,815 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 06:01:19,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2ce8e362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:19, skipping insertion in model container [2023-08-30 06:01:19,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:01:19,818 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:01:19,820 INFO L158 Benchmark]: Toolchain (without parser) took 288.54ms. Allocated memory is still 71.3MB. Free memory was 48.4MB in the beginning and 37.7MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 06:01:19,821 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 58.7MB. Free memory was 36.5MB in the beginning and 36.5MB in the end (delta: 58.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:01:19,822 INFO L158 Benchmark]: CACSL2BoogieTranslator took 286.56ms. Allocated memory is still 71.3MB. Free memory was 48.2MB in the beginning and 37.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 06:01:19,824 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 58.7MB. Free memory was 36.5MB in the beginning and 36.5MB in the end (delta: 58.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 286.56ms. Allocated memory is still 71.3MB. Free memory was 48.2MB in the beginning and 37.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 163]: 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-buffer-mult-alt.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 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:01:21,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:01:21,702 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:01:21,748 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:01:21,749 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:01:21,752 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:01:21,754 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:01:21,757 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:01:21,760 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:01:21,765 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:01:21,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:01:21,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:01:21,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:01:21,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:01:21,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:01:21,778 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:01:21,779 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:01:21,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:01:21,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:01:21,788 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:01:21,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:01:21,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:01:21,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:01:21,795 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:01:21,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:01:21,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:01:21,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:01:21,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:01:21,805 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:01:21,806 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:01:21,806 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:01:21,807 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:01:21,809 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:01:21,809 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:01:21,810 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:01:21,810 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:01:21,811 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:01:21,811 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:01:21,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:01:21,812 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:01:21,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:01:21,823 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:01:21,859 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:01:21,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:01:21,861 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:01:21,861 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:01:21,862 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:01:21,862 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:01:21,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:01:21,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:01:21,863 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:01:21,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:01:21,864 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:01:21,864 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:01:21,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:01:21,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:01:21,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:01:21,865 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:01:21,865 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:01:21,865 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:01:21,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:01:21,866 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:01:21,866 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:01:21,866 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:01:21,866 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:01:21,866 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:01:21,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:01:21,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:01:21,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:01:21,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:01:21,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:01:21,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:01:21,868 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:01:21,868 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:01:21,868 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:01:21,868 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:01:21,868 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:01:21,869 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:01:21,869 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:01:21,869 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:01:22,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:01:22,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:01:22,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:01:22,210 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:01:22,210 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:01:22,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2023-08-30 06:01:23,402 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:01:23,631 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:01:23,632 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2023-08-30 06:01:23,639 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c38995414/be98c7c7abf24bfa877911fac3286f6f/FLAG91e55df3e [2023-08-30 06:01:23,650 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c38995414/be98c7c7abf24bfa877911fac3286f6f [2023-08-30 06:01:23,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:01:23,653 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:01:23,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:01:23,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:01:23,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:01:23,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:01:23" (1/1) ... [2023-08-30 06:01:23,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13b53caa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:23, skipping insertion in model container [2023-08-30 06:01:23,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:01:23" (1/1) ... [2023-08-30 06:01:23,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:01:23,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:01:23,863 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-buffer-mult-alt.wvr.c[4293,4306] [2023-08-30 06:01:23,883 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:01:23,906 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:01:23,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:01:23,942 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-buffer-mult-alt.wvr.c[4293,4306] [2023-08-30 06:01:23,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:01:23,961 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:01:23,997 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-buffer-mult-alt.wvr.c[4293,4306] [2023-08-30 06:01:24,013 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:01:24,025 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:01:24,028 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:01:24,034 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:01:24,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:24 WrapperNode [2023-08-30 06:01:24,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:01:24,036 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:01:24,036 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:01:24,036 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:01:24,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:24" (1/1) ... [2023-08-30 06:01:24,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:24" (1/1) ... [2023-08-30 06:01:24,101 INFO L138 Inliner]: procedures = 28, calls = 79, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 317 [2023-08-30 06:01:24,102 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:01:24,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:01:24,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:01:24,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:01:24,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:24" (1/1) ... [2023-08-30 06:01:24,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:24" (1/1) ... [2023-08-30 06:01:24,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:24" (1/1) ... [2023-08-30 06:01:24,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:24" (1/1) ... [2023-08-30 06:01:24,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:24" (1/1) ... [2023-08-30 06:01:24,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:24" (1/1) ... [2023-08-30 06:01:24,201 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:24" (1/1) ... [2023-08-30 06:01:24,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:24" (1/1) ... [2023-08-30 06:01:24,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:01:24,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:01:24,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:01:24,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:01:24,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:24" (1/1) ... [2023-08-30 06:01:24,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:01:24,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:01:24,255 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 06:01:24,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 06:01:24,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:01:24,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:01:24,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:01:24,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:01:24,298 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:01:24,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:01:24,298 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:01:24,299 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:01:24,299 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 06:01:24,299 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 06:01:24,299 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 06:01:24,299 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 06:01:24,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:01:24,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:01:24,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:01:24,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:01:24,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:01:24,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:01:24,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:01:24,303 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 06:01:24,485 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:01:24,494 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:01:25,069 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:01:25,252 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:01:25,253 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 06:01:25,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:01:25 BoogieIcfgContainer [2023-08-30 06:01:25,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:01:25,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:01:25,257 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:01:25,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:01:25,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:01:23" (1/3) ... [2023-08-30 06:01:25,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f971dd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:01:25, skipping insertion in model container [2023-08-30 06:01:25,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:24" (2/3) ... [2023-08-30 06:01:25,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f971dd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:01:25, skipping insertion in model container [2023-08-30 06:01:25,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:01:25" (3/3) ... [2023-08-30 06:01:25,262 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2023-08-30 06:01:25,278 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:01:25,279 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-08-30 06:01:25,279 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:01:25,394 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 06:01:25,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 254 places, 260 transitions, 552 flow [2023-08-30 06:01:25,561 INFO L130 PetriNetUnfolder]: 19/256 cut-off events. [2023-08-30 06:01:25,561 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 06:01:25,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 256 events. 19/256 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 231 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 206. Up to 2 conditions per place. [2023-08-30 06:01:25,570 INFO L82 GeneralOperation]: Start removeDead. Operand has 254 places, 260 transitions, 552 flow [2023-08-30 06:01:25,579 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 246 places, 252 transitions, 528 flow [2023-08-30 06:01:25,584 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:01:25,593 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 246 places, 252 transitions, 528 flow [2023-08-30 06:01:25,596 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 246 places, 252 transitions, 528 flow [2023-08-30 06:01:25,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 252 transitions, 528 flow [2023-08-30 06:01:25,638 INFO L130 PetriNetUnfolder]: 19/252 cut-off events. [2023-08-30 06:01:25,638 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 06:01:25,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 252 events. 19/252 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 231 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 206. Up to 2 conditions per place. [2023-08-30 06:01:25,645 INFO L119 LiptonReduction]: Number of co-enabled transitions 3392 [2023-08-30 06:01:53,067 INFO L134 LiptonReduction]: Checked pairs total: 7113 [2023-08-30 06:01:53,068 INFO L136 LiptonReduction]: Total number of compositions: 257 [2023-08-30 06:01:53,090 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:01:53,096 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;@14025220, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:01:53,097 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2023-08-30 06:01:53,100 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 06:01:53,101 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:01:53,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:01:53,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:01:53,105 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:01:53,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:01:53,111 INFO L85 PathProgramCache]: Analyzing trace with hash 37953, now seen corresponding path program 1 times [2023-08-30 06:01:53,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:01:53,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717740119] [2023-08-30 06:01:53,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:01:53,127 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:01:53,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:01:53,133 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:01:53,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 06:01:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:01:53,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:01:53,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:01:53,482 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-30 06:01:53,483 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 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-30 06:01:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:01:53,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:01:53,520 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:01:53,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717740119] [2023-08-30 06:01:53,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717740119] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:01:53,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:01:53,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:01:53,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246848278] [2023-08-30 06:01:53,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:01:53,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:01:53,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:01:53,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:01:53,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:01:53,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 517 [2023-08-30 06:01:53,681 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 66 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:01:53,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:01:53,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 517 [2023-08-30 06:01:53,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:01:56,875 INFO L130 PetriNetUnfolder]: 21072/26499 cut-off events. [2023-08-30 06:01:56,875 INFO L131 PetriNetUnfolder]: For 223/223 co-relation queries the response was YES. [2023-08-30 06:01:56,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53205 conditions, 26499 events. 21072/26499 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 1976. Compared 137726 event pairs, 14510 based on Foata normal form. 0/8208 useless extension candidates. Maximal degree in co-relation 47480. Up to 26073 conditions per place. [2023-08-30 06:01:57,143 INFO L137 encePairwiseOnDemand]: 513/517 looper letters, 56 selfloop transitions, 1 changer transitions 0/63 dead transitions. [2023-08-30 06:01:57,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 63 transitions, 264 flow [2023-08-30 06:01:57,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:01:57,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:01:57,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 696 transitions. [2023-08-30 06:01:57,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44874274661508706 [2023-08-30 06:01:57,160 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 696 transitions. [2023-08-30 06:01:57,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 696 transitions. [2023-08-30 06:01:57,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:01:57,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 696 transitions. [2023-08-30 06:01:57,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:01:57,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:01:57,176 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:01:57,178 INFO L175 Difference]: Start difference. First operand has 73 places, 66 transitions, 156 flow. Second operand 3 states and 696 transitions. [2023-08-30 06:01:57,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 63 transitions, 264 flow [2023-08-30 06:01:57,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 63 transitions, 248 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 06:01:57,237 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 136 flow [2023-08-30 06:01:57,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2023-08-30 06:01:57,242 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -9 predicate places. [2023-08-30 06:01:57,242 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 136 flow [2023-08-30 06:01:57,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:01:57,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:01:57,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:01:57,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 06:01:57,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:01:57,453 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:01:57,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:01:57,454 INFO L85 PathProgramCache]: Analyzing trace with hash 37954, now seen corresponding path program 1 times [2023-08-30 06:01:57,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:01:57,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699315373] [2023-08-30 06:01:57,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:01:57,455 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:01:57,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:01:57,457 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:01:57,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 06:01:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:01:57,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:01:57,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:01:57,742 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:01:57,742 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:01:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:01:57,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:01:57,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:01:57,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699315373] [2023-08-30 06:01:57,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699315373] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:01:57,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:01:57,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:01:57,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555593231] [2023-08-30 06:01:57,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:01:57,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:01:57,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:01:57,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:01:57,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:01:57,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 517 [2023-08-30 06:01:57,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:01:57,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:01:57,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 517 [2023-08-30 06:01:57,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:02:02,533 INFO L130 PetriNetUnfolder]: 42143/52995 cut-off events. [2023-08-30 06:02:02,534 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:02:02,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105588 conditions, 52995 events. 42143/52995 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3700. Compared 296944 event pairs, 29020 based on Foata normal form. 0/16883 useless extension candidates. Maximal degree in co-relation 105582. Up to 26074 conditions per place. [2023-08-30 06:02:02,879 INFO L137 encePairwiseOnDemand]: 511/517 looper letters, 107 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2023-08-30 06:02:02,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 117 transitions, 474 flow [2023-08-30 06:02:02,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:02:02,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:02:02,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 749 transitions. [2023-08-30 06:02:02,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4829142488716957 [2023-08-30 06:02:02,883 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 749 transitions. [2023-08-30 06:02:02,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 749 transitions. [2023-08-30 06:02:02,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:02:02,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 749 transitions. [2023-08-30 06:02:02,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:02,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:02,890 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:02,890 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 136 flow. Second operand 3 states and 749 transitions. [2023-08-30 06:02:02,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 117 transitions, 474 flow [2023-08-30 06:02:02,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 117 transitions, 473 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:02:02,894 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 167 flow [2023-08-30 06:02:02,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2023-08-30 06:02:02,895 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -6 predicate places. [2023-08-30 06:02:02,896 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 167 flow [2023-08-30 06:02:02,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:02,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:02:02,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:02:02,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 06:02:03,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:02:03,108 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:02:03,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:02:03,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1178785, now seen corresponding path program 1 times [2023-08-30 06:02:03,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:02:03,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [601662591] [2023-08-30 06:02:03,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:02:03,110 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:02:03,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:02:03,112 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:02:03,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 06:02:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:02:03,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:02:03,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:02:03,369 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:02:03,369 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:02:03,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:02:03,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:02:03,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:02:03,631 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:02:03,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [601662591] [2023-08-30 06:02:03,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [601662591] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:02:03,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:02:03,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:02:03,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616300015] [2023-08-30 06:02:03,632 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:02:03,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:02:03,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:02:03,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:02:03,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:02:04,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 517 [2023-08-30 06:02:04,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 167 flow. Second operand has 6 states, 6 states have (on average 203.0) internal successors, (1218), 6 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:04,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:02:04,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 517 [2023-08-30 06:02:04,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:02:11,141 INFO L130 PetriNetUnfolder]: 63222/79503 cut-off events. [2023-08-30 06:02:11,141 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:02:11,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158427 conditions, 79503 events. 63222/79503 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5300. Compared 461034 event pairs, 43530 based on Foata normal form. 0/25662 useless extension candidates. Maximal degree in co-relation 158418. Up to 26075 conditions per place. [2023-08-30 06:02:11,616 INFO L137 encePairwiseOnDemand]: 508/517 looper letters, 158 selfloop transitions, 19 changer transitions 0/183 dead transitions. [2023-08-30 06:02:11,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 183 transitions, 795 flow [2023-08-30 06:02:11,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:02:11,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:02:11,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1395 transitions. [2023-08-30 06:02:11,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497098646034816 [2023-08-30 06:02:11,628 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1395 transitions. [2023-08-30 06:02:11,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1395 transitions. [2023-08-30 06:02:11,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:02:11,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1395 transitions. [2023-08-30 06:02:11,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 232.5) internal successors, (1395), 6 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:11,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 517.0) internal successors, (3619), 7 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:11,647 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 517.0) internal successors, (3619), 7 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:11,647 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 167 flow. Second operand 6 states and 1395 transitions. [2023-08-30 06:02:11,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 183 transitions, 795 flow [2023-08-30 06:02:11,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 183 transitions, 781 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:02:11,654 INFO L231 Difference]: Finished difference. Result has 74 places, 81 transitions, 304 flow [2023-08-30 06:02:11,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=304, PETRI_PLACES=74, PETRI_TRANSITIONS=81} [2023-08-30 06:02:11,655 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 1 predicate places. [2023-08-30 06:02:11,655 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 81 transitions, 304 flow [2023-08-30 06:02:11,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 203.0) internal successors, (1218), 6 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:11,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:02:11,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:02:11,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 06:02:11,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:02:11,869 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:02:11,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:02:11,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1180458, now seen corresponding path program 1 times [2023-08-30 06:02:11,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:02:11,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409306633] [2023-08-30 06:02:11,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:02:11,870 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:02:11,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:02:11,871 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:02:11,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 06:02:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:02:12,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 06:02:12,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:02:12,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:12,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:12,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:12,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:12,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:12,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:12,167 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-30 06:02:12,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2023-08-30 06:02:12,227 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2023-08-30 06:02:12,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 165 treesize of output 162 [2023-08-30 06:02:12,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:12,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:02:12,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:02:12,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:02:12,388 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:02:12,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409306633] [2023-08-30 06:02:12,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409306633] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:02:12,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:02:12,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:02:12,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420336926] [2023-08-30 06:02:12,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:02:12,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:02:12,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:02:12,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:02:12,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:02:12,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 517 [2023-08-30 06:02:12,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 81 transitions, 304 flow. Second operand has 4 states, 4 states have (on average 217.75) internal successors, (871), 4 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:12,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:02:12,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 517 [2023-08-30 06:02:12,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:02:17,276 INFO L130 PetriNetUnfolder]: 50800/64378 cut-off events. [2023-08-30 06:02:17,276 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 06:02:17,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128225 conditions, 64378 events. 50800/64378 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4120. Compared 374338 event pairs, 34710 based on Foata normal form. 0/21127 useless extension candidates. Maximal degree in co-relation 128212. Up to 63100 conditions per place. [2023-08-30 06:02:17,672 INFO L137 encePairwiseOnDemand]: 514/517 looper letters, 70 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2023-08-30 06:02:17,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 77 transitions, 426 flow [2023-08-30 06:02:17,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:02:17,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:02:17,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 708 transitions. [2023-08-30 06:02:17,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564796905222437 [2023-08-30 06:02:17,675 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 708 transitions. [2023-08-30 06:02:17,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 708 transitions. [2023-08-30 06:02:17,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:02:17,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 708 transitions. [2023-08-30 06:02:17,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:17,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:17,683 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:17,683 INFO L175 Difference]: Start difference. First operand has 74 places, 81 transitions, 304 flow. Second operand 3 states and 708 transitions. [2023-08-30 06:02:17,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 77 transitions, 426 flow [2023-08-30 06:02:17,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 77 transitions, 407 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 06:02:17,688 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 267 flow [2023-08-30 06:02:17,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=267, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2023-08-30 06:02:17,704 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 0 predicate places. [2023-08-30 06:02:17,704 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 267 flow [2023-08-30 06:02:17,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.75) internal successors, (871), 4 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:17,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:02:17,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:02:17,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 06:02:17,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:02:17,920 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:02:17,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:02:17,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1180459, now seen corresponding path program 1 times [2023-08-30 06:02:17,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:02:17,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349679621] [2023-08-30 06:02:17,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:02:17,921 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:02:17,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:02:17,923 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:02:17,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 06:02:18,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:02:18,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 06:02:18,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:02:18,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:18,140 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2023-08-30 06:02:18,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2023-08-30 06:02:19,108 INFO L321 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2023-08-30 06:02:19,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 44 [2023-08-30 06:02:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:02:19,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:02:19,618 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:02:19,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349679621] [2023-08-30 06:02:19,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349679621] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:02:19,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:02:19,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:02:19,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069828407] [2023-08-30 06:02:19,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:02:19,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:02:19,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:02:19,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:02:19,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:02:20,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 517 [2023-08-30 06:02:20,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 267 flow. Second operand has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:20,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:02:20,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 517 [2023-08-30 06:02:20,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:02:23,896 INFO L130 PetriNetUnfolder]: 38378/49253 cut-off events. [2023-08-30 06:02:23,896 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 06:02:24,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97956 conditions, 49253 events. 38378/49253 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2963. Compared 287803 event pairs, 25890 based on Foata normal form. 0/17887 useless extension candidates. Maximal degree in co-relation 97942. Up to 47975 conditions per place. [2023-08-30 06:02:24,256 INFO L137 encePairwiseOnDemand]: 514/517 looper letters, 66 selfloop transitions, 1 changer transitions 0/73 dead transitions. [2023-08-30 06:02:24,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 73 transitions, 381 flow [2023-08-30 06:02:24,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:02:24,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:02:24,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 700 transitions. [2023-08-30 06:02:24,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513217279174726 [2023-08-30 06:02:24,265 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 700 transitions. [2023-08-30 06:02:24,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 700 transitions. [2023-08-30 06:02:24,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:02:24,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 700 transitions. [2023-08-30 06:02:24,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:24,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:24,271 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:24,271 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 267 flow. Second operand 3 states and 700 transitions. [2023-08-30 06:02:24,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 73 transitions, 381 flow [2023-08-30 06:02:24,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 73 transitions, 380 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:02:24,275 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 248 flow [2023-08-30 06:02:24,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2023-08-30 06:02:24,278 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -1 predicate places. [2023-08-30 06:02:24,278 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 248 flow [2023-08-30 06:02:24,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:24,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:02:24,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:02:24,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 06:02:24,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:02:24,489 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:02:24,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:02:24,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1134447939, now seen corresponding path program 1 times [2023-08-30 06:02:24,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:02:24,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999973674] [2023-08-30 06:02:24,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:02:24,490 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:02:24,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:02:24,491 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:02:24,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 06:02:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:02:24,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 06:02:24,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:02:24,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:24,716 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2023-08-30 06:02:24,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2023-08-30 06:02:25,534 INFO L321 Elim1Store]: treesize reduction 58, result has 27.5 percent of original size [2023-08-30 06:02:25,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 44 [2023-08-30 06:02:25,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:02:25,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:02:25,813 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:02:25,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999973674] [2023-08-30 06:02:25,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999973674] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:02:25,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:02:25,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:02:25,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204014132] [2023-08-30 06:02:25,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:02:25,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:02:25,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:02:25,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:02:25,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:02:26,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 517 [2023-08-30 06:02:26,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:26,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:02:26,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 517 [2023-08-30 06:02:26,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:02:29,936 INFO L130 PetriNetUnfolder]: 36959/47366 cut-off events. [2023-08-30 06:02:29,936 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 06:02:30,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94183 conditions, 47366 events. 36959/47366 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2853. Compared 274590 event pairs, 24783 based on Foata normal form. 0/17476 useless extension candidates. Maximal degree in co-relation 94168. Up to 46088 conditions per place. [2023-08-30 06:02:30,264 INFO L137 encePairwiseOnDemand]: 514/517 looper letters, 64 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-08-30 06:02:30,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 71 transitions, 374 flow [2023-08-30 06:02:30,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:02:30,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:02:30,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 698 transitions. [2023-08-30 06:02:30,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45003223726627983 [2023-08-30 06:02:30,267 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 698 transitions. [2023-08-30 06:02:30,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 698 transitions. [2023-08-30 06:02:30,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:02:30,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 698 transitions. [2023-08-30 06:02:30,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.66666666666666) internal successors, (698), 3 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:30,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:30,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:30,272 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 248 flow. Second operand 3 states and 698 transitions. [2023-08-30 06:02:30,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 71 transitions, 374 flow [2023-08-30 06:02:30,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 71 transitions, 373 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:02:30,275 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 245 flow [2023-08-30 06:02:30,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=245, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2023-08-30 06:02:30,275 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -2 predicate places. [2023-08-30 06:02:30,276 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 245 flow [2023-08-30 06:02:30,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:30,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:02:30,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:02:30,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 06:02:30,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:02:30,486 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:02:30,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:02:30,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1134447938, now seen corresponding path program 1 times [2023-08-30 06:02:30,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:02:30,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [433539821] [2023-08-30 06:02:30,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:02:30,487 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:02:30,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:02:30,488 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:02:30,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 06:02:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:02:30,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:02:30,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:02:30,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:30,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:30,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:30,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:30,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:30,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:30,727 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-30 06:02:30,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2023-08-30 06:02:30,770 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 06:02:30,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2023-08-30 06:02:30,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:30,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:02:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:02:30,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:02:30,868 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:02:30,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [433539821] [2023-08-30 06:02:30,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [433539821] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:02:30,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:02:30,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:02:30,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081824961] [2023-08-30 06:02:30,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:02:30,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:02:30,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:02:30,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:02:30,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:02:31,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 517 [2023-08-30 06:02:31,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 245 flow. Second operand has 4 states, 4 states have (on average 218.25) internal successors, (873), 4 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:31,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:02:31,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 517 [2023-08-30 06:02:31,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:02:34,713 INFO L130 PetriNetUnfolder]: 35540/45479 cut-off events. [2023-08-30 06:02:34,713 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 06:02:34,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90410 conditions, 45479 events. 35540/45479 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2743. Compared 261477 event pairs, 23676 based on Foata normal form. 0/17065 useless extension candidates. Maximal degree in co-relation 90394. Up to 44201 conditions per place. [2023-08-30 06:02:35,025 INFO L137 encePairwiseOnDemand]: 514/517 looper letters, 62 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2023-08-30 06:02:35,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 367 flow [2023-08-30 06:02:35,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:02:35,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:02:35,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 702 transitions. [2023-08-30 06:02:35,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4526112185686654 [2023-08-30 06:02:35,028 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 702 transitions. [2023-08-30 06:02:35,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 702 transitions. [2023-08-30 06:02:35,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:02:35,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 702 transitions. [2023-08-30 06:02:35,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:35,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:35,033 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:35,033 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 245 flow. Second operand 3 states and 702 transitions. [2023-08-30 06:02:35,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 69 transitions, 367 flow [2023-08-30 06:02:35,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 366 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:02:35,036 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 242 flow [2023-08-30 06:02:35,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2023-08-30 06:02:35,037 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -3 predicate places. [2023-08-30 06:02:35,037 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 242 flow [2023-08-30 06:02:35,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 218.25) internal successors, (873), 4 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:35,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:02:35,038 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:02:35,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 06:02:35,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:02:35,244 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:02:35,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:02:35,244 INFO L85 PathProgramCache]: Analyzing trace with hash 759641090, now seen corresponding path program 2 times [2023-08-30 06:02:35,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:02:35,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698133177] [2023-08-30 06:02:35,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:02:35,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:02:35,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:02:35,245 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:02:35,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 06:02:35,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:02:35,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:02:35,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 06:02:35,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:02:35,463 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:02:35,464 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:02:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:02:35,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:02:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:02:36,063 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:02:36,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698133177] [2023-08-30 06:02:36,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698133177] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:02:36,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:02:36,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:02:36,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887996315] [2023-08-30 06:02:36,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:02:36,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:02:36,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:02:36,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:02:36,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:02:39,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 517 [2023-08-30 06:02:39,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 242 flow. Second operand has 12 states, 12 states have (on average 205.0) internal successors, (2460), 12 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:39,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:02:39,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 517 [2023-08-30 06:02:39,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:02:42,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:02:43,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:02:44,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:02:46,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:02:47,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:02:49,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:03:05,458 INFO L130 PetriNetUnfolder]: 118453/151567 cut-off events. [2023-08-30 06:03:05,458 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-08-30 06:03:05,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301214 conditions, 151567 events. 118453/151567 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 5792. Compared 949479 event pairs, 78920 based on Foata normal form. 12/59436 useless extension candidates. Maximal degree in co-relation 301197. Up to 14739 conditions per place. [2023-08-30 06:03:06,546 INFO L137 encePairwiseOnDemand]: 510/517 looper letters, 435 selfloop transitions, 32 changer transitions 0/473 dead transitions. [2023-08-30 06:03:06,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 473 transitions, 2160 flow [2023-08-30 06:03:06,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 06:03:06,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 06:03:06,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2927 transitions. [2023-08-30 06:03:06,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471792392005158 [2023-08-30 06:03:06,554 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2927 transitions. [2023-08-30 06:03:06,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2927 transitions. [2023-08-30 06:03:06,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:03:06,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2927 transitions. [2023-08-30 06:03:06,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 243.91666666666666) internal successors, (2927), 12 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:06,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 517.0) internal successors, (6721), 13 states have internal predecessors, (6721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:06,573 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 517.0) internal successors, (6721), 13 states have internal predecessors, (6721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:06,573 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 242 flow. Second operand 12 states and 2927 transitions. [2023-08-30 06:03:06,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 473 transitions, 2160 flow [2023-08-30 06:03:06,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 473 transitions, 2159 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:03:06,581 INFO L231 Difference]: Finished difference. Result has 87 places, 88 transitions, 485 flow [2023-08-30 06:03:06,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=485, PETRI_PLACES=87, PETRI_TRANSITIONS=88} [2023-08-30 06:03:06,582 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 14 predicate places. [2023-08-30 06:03:06,582 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 88 transitions, 485 flow [2023-08-30 06:03:06,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 205.0) internal successors, (2460), 12 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:06,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:03:06,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:03:06,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 06:03:06,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:03:06,795 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:03:06,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:03:06,795 INFO L85 PathProgramCache]: Analyzing trace with hash 808140640, now seen corresponding path program 1 times [2023-08-30 06:03:06,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:03:06,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1367889648] [2023-08-30 06:03:06,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:03:06,796 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:03:06,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:03:06,797 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:03:06,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 06:03:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:03:06,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:03:06,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:03:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:03:06,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:03:06,931 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:03:06,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1367889648] [2023-08-30 06:03:06,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1367889648] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:03:06,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:03:06,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:03:06,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373979859] [2023-08-30 06:03:06,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:03:06,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:03:06,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:03:06,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:03:06,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:03:06,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 517 [2023-08-30 06:03:06,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 88 transitions, 485 flow. Second operand has 4 states, 4 states have (on average 215.25) internal successors, (861), 4 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:06,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:03:06,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 517 [2023-08-30 06:03:06,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:03:21,652 INFO L130 PetriNetUnfolder]: 132714/171900 cut-off events. [2023-08-30 06:03:21,652 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-08-30 06:03:22,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341818 conditions, 171900 events. 132714/171900 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 7032. Compared 1135461 event pairs, 89640 based on Foata normal form. 0/70959 useless extension candidates. Maximal degree in co-relation 341793. Up to 147306 conditions per place. [2023-08-30 06:03:23,199 INFO L137 encePairwiseOnDemand]: 508/517 looper letters, 130 selfloop transitions, 3 changer transitions 0/139 dead transitions. [2023-08-30 06:03:23,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 139 transitions, 982 flow [2023-08-30 06:03:23,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:03:23,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:03:23,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 951 transitions. [2023-08-30 06:03:23,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4598646034816248 [2023-08-30 06:03:23,201 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 951 transitions. [2023-08-30 06:03:23,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 951 transitions. [2023-08-30 06:03:23,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:03:23,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 951 transitions. [2023-08-30 06:03:23,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 237.75) internal successors, (951), 4 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:23,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 517.0) internal successors, (2585), 5 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:23,207 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 517.0) internal successors, (2585), 5 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:23,207 INFO L175 Difference]: Start difference. First operand has 87 places, 88 transitions, 485 flow. Second operand 4 states and 951 transitions. [2023-08-30 06:03:23,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 139 transitions, 982 flow [2023-08-30 06:03:23,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 139 transitions, 899 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-08-30 06:03:23,212 INFO L231 Difference]: Finished difference. Result has 87 places, 88 transitions, 445 flow [2023-08-30 06:03:23,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=445, PETRI_PLACES=87, PETRI_TRANSITIONS=88} [2023-08-30 06:03:23,213 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 14 predicate places. [2023-08-30 06:03:23,213 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 88 transitions, 445 flow [2023-08-30 06:03:23,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 215.25) internal successors, (861), 4 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:23,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:03:23,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:03:23,224 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 (10)] Ended with exit code 0 [2023-08-30 06:03:23,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:03:23,423 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:03:23,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:03:23,424 INFO L85 PathProgramCache]: Analyzing trace with hash 2122539070, now seen corresponding path program 1 times [2023-08-30 06:03:23,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:03:23,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783424272] [2023-08-30 06:03:23,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:03:23,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:03:23,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:03:23,426 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:03:23,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 06:03:23,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:03:23,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:03:23,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:03:23,635 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-30 06:03:23,636 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 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-30 06:03:23,662 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 06:03:23,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:03:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:03:23,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:03:23,677 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:03:23,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783424272] [2023-08-30 06:03:23,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783424272] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:03:23,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:03:23,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:03:23,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797348781] [2023-08-30 06:03:23,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:03:23,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:03:23,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:03:23,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:03:23,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:03:23,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 517 [2023-08-30 06:03:23,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 88 transitions, 445 flow. Second operand has 4 states, 4 states have (on average 211.5) internal successors, (846), 4 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:23,830 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:03:23,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 517 [2023-08-30 06:03:23,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:03:33,852 INFO L130 PetriNetUnfolder]: 92684/121760 cut-off events. [2023-08-30 06:03:33,853 INFO L131 PetriNetUnfolder]: For 11939/11939 co-relation queries the response was YES. [2023-08-30 06:03:34,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266566 conditions, 121760 events. 92684/121760 cut-off events. For 11939/11939 co-relation queries the response was YES. Maximal size of possible extension queue 4840. Compared 806304 event pairs, 63360 based on Foata normal form. 0/64670 useless extension candidates. Maximal degree in co-relation 266539. Up to 118187 conditions per place. [2023-08-30 06:03:34,877 INFO L137 encePairwiseOnDemand]: 513/517 looper letters, 68 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2023-08-30 06:03:34,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 86 transitions, 597 flow [2023-08-30 06:03:34,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:03:34,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:03:34,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 889 transitions. [2023-08-30 06:03:34,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42988394584139267 [2023-08-30 06:03:34,879 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 889 transitions. [2023-08-30 06:03:34,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 889 transitions. [2023-08-30 06:03:34,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:03:34,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 889 transitions. [2023-08-30 06:03:34,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 222.25) internal successors, (889), 4 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:34,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 517.0) internal successors, (2585), 5 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:34,885 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 517.0) internal successors, (2585), 5 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:34,885 INFO L175 Difference]: Start difference. First operand has 87 places, 88 transitions, 445 flow. Second operand 4 states and 889 transitions. [2023-08-30 06:03:34,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 86 transitions, 597 flow [2023-08-30 06:03:34,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 86 transitions, 591 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 06:03:34,901 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 455 flow [2023-08-30 06:03:34,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=455, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2023-08-30 06:03:34,902 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 14 predicate places. [2023-08-30 06:03:34,903 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 455 flow [2023-08-30 06:03:34,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 211.5) internal successors, (846), 4 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:34,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:03:34,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:03:34,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 06:03:35,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:03:35,113 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:03:35,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:03:35,113 INFO L85 PathProgramCache]: Analyzing trace with hash 2122539071, now seen corresponding path program 1 times [2023-08-30 06:03:35,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:03:35,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032504202] [2023-08-30 06:03:35,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:03:35,114 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:03:35,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:03:35,115 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:03:35,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 06:03:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:03:35,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 06:03:35,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:03:35,379 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:03:35,380 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:03:35,547 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-30 06:03:35,548 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 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-30 06:03:35,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:03:35,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 06:03:35,694 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:03:35,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 06:03:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:03:35,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:03:38,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:03:38,447 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:03:38,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032504202] [2023-08-30 06:03:38,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032504202] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:03:38,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:03:38,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:03:38,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561448862] [2023-08-30 06:03:38,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:03:38,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:03:38,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:03:38,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:03:38,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:03:43,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:03:48,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:03:52,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 517 [2023-08-30 06:03:52,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 455 flow. Second operand has 8 states, 8 states have (on average 193.5) internal successors, (1548), 8 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:52,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:03:52,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 517 [2023-08-30 06:03:52,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:04:03,945 WARN L222 SmtUtils]: Spent 11.04s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:04:05,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:04:16,164 WARN L222 SmtUtils]: Spent 7.38s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:04:27,435 WARN L222 SmtUtils]: Spent 6.25s on a formula simplification. DAG size of input: 53 DAG size of output: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:04:53,656 INFO L130 PetriNetUnfolder]: 185526/243966 cut-off events. [2023-08-30 06:04:53,656 INFO L131 PetriNetUnfolder]: For 31122/31122 co-relation queries the response was YES. [2023-08-30 06:04:55,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528769 conditions, 243966 events. 185526/243966 cut-off events. For 31122/31122 co-relation queries the response was YES. Maximal size of possible extension queue 9244. Compared 1721550 event pairs, 126320 based on Foata normal form. 0/148424 useless extension candidates. Maximal degree in co-relation 528741. Up to 98441 conditions per place. [2023-08-30 06:04:56,039 INFO L137 encePairwiseOnDemand]: 508/517 looper letters, 236 selfloop transitions, 31 changer transitions 0/273 dead transitions. [2023-08-30 06:04:56,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 273 transitions, 1625 flow [2023-08-30 06:04:56,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 06:04:56,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 06:04:56,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3104 transitions. [2023-08-30 06:04:56,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40025789813023854 [2023-08-30 06:04:56,047 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3104 transitions. [2023-08-30 06:04:56,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3104 transitions. [2023-08-30 06:04:56,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:04:56,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3104 transitions. [2023-08-30 06:04:56,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 206.93333333333334) internal successors, (3104), 15 states have internal predecessors, (3104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:04:56,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 517.0) internal successors, (8272), 16 states have internal predecessors, (8272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:04:56,063 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 517.0) internal successors, (8272), 16 states have internal predecessors, (8272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:04:56,063 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 455 flow. Second operand 15 states and 3104 transitions. [2023-08-30 06:04:56,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 273 transitions, 1625 flow [2023-08-30 06:04:56,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 273 transitions, 1612 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:04:56,082 INFO L231 Difference]: Finished difference. Result has 105 places, 104 transitions, 696 flow [2023-08-30 06:04:56,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=696, PETRI_PLACES=105, PETRI_TRANSITIONS=104} [2023-08-30 06:04:56,083 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 32 predicate places. [2023-08-30 06:04:56,083 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 104 transitions, 696 flow [2023-08-30 06:04:56,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.5) internal successors, (1548), 8 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:04:56,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:04:56,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:04:56,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 06:04:56,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:04:56,303 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:04:56,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:04:56,303 INFO L85 PathProgramCache]: Analyzing trace with hash -717193971, now seen corresponding path program 1 times [2023-08-30 06:04:56,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:04:56,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1957061946] [2023-08-30 06:04:56,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:04:56,304 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:04:56,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:04:56,305 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:04:56,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 06:04:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:04:56,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 06:04:56,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:04:56,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:04:56,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:04:56,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:04:56,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:04:56,630 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 06:04:56,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 47 [2023-08-30 06:04:56,651 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 18 treesize of output 16 [2023-08-30 06:04:56,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:04:56,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:04:56,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:04:56,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:04:56,857 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:04:56,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1957061946] [2023-08-30 06:04:56,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1957061946] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:04:56,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:04:56,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:04:56,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982282954] [2023-08-30 06:04:56,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:04:56,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:04:56,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:04:56,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:04:56,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:04:57,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 517 [2023-08-30 06:04:57,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 104 transitions, 696 flow. Second operand has 4 states, 4 states have (on average 218.75) internal successors, (875), 4 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:04:57,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:04:57,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 517 [2023-08-30 06:04:57,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand