./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-max-array-hom.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-more-max-array-hom.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 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c --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 06:43:36,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:43:36,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:43:36,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:43:36,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:43:36,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:43:36,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:43:36,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:43:36,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:43:36,652 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:43:36,653 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:43:36,656 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:43:36,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:43:36,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:43:36,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:43:36,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:43:36,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:43:36,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:43:36,667 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:43:36,669 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:43:36,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:43:36,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:43:36,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:43:36,673 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:43:36,676 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:43:36,677 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:43:36,677 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:43:36,678 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:43:36,678 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:43:36,679 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:43:36,679 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:43:36,679 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:43:36,680 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:43:36,680 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:43:36,681 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:43:36,681 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:43:36,682 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:43:36,682 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:43:36,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:43:36,683 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:43:36,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:43:36,684 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:43:36,715 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:43:36,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:43:36,716 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:43:36,716 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:43:36,717 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:43:36,718 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:43:36,718 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:43:36,718 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:43:36,718 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:43:36,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:43:36,719 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:43:36,720 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:43:36,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:43:36,720 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:43:36,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:43:36,720 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:43:36,720 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:43:36,721 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:43:36,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:43:36,721 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:43:36,721 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:43:36,721 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:43:36,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:43:36,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:43:36,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:43:36,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:43:36,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:43:36,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:43:36,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:43:36,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:43:36,723 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:43:36,723 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:43:36,724 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:43:36,724 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:43:36,724 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:43:37,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:43:37,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:43:37,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:43:37,044 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:43:37,044 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:43:37,046 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c [2023-08-30 06:43:38,296 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:43:38,552 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:43:38,553 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c [2023-08-30 06:43:38,559 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5853ae65e/a0c675b9d3be4a6189ad3b4063bc6142/FLAGa1521ed0b [2023-08-30 06:43:38,573 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5853ae65e/a0c675b9d3be4a6189ad3b4063bc6142 [2023-08-30 06:43:38,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:43:38,577 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:43:38,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:43:38,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:43:38,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:43:38,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:43:38" (1/1) ... [2023-08-30 06:43:38,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c7339ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:38, skipping insertion in model container [2023-08-30 06:43:38,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:43:38" (1/1) ... [2023-08-30 06:43:38,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:43:38,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:43:38,772 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2023-08-30 06:43:38,787 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:43:38,797 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 06:43:38,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@53e5dc87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:38, skipping insertion in model container [2023-08-30 06:43:38,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:43:38,799 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:43:38,801 INFO L158 Benchmark]: Toolchain (without parser) took 223.14ms. Allocated memory is still 73.4MB. Free memory was 50.8MB in the beginning and 41.1MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 06:43:38,802 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 73.4MB. Free memory was 50.7MB in the beginning and 50.6MB in the end (delta: 94.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:43:38,803 INFO L158 Benchmark]: CACSL2BoogieTranslator took 221.29ms. Allocated memory is still 73.4MB. Free memory was 50.6MB in the beginning and 41.1MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 06:43:38,804 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 73.4MB. Free memory was 50.7MB in the beginning and 50.6MB in the end (delta: 94.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 221.29ms. Allocated memory is still 73.4MB. Free memory was 50.6MB in the beginning and 41.1MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 109]: 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-more-max-array-hom.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 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c --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 06:43:40,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:43:40,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:43:40,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:43:40,508 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:43:40,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:43:40,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:43:40,516 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:43:40,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:43:40,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:43:40,523 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:43:40,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:43:40,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:43:40,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:43:40,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:43:40,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:43:40,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:43:40,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:43:40,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:43:40,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:43:40,542 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:43:40,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:43:40,558 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:43:40,559 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:43:40,565 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:43:40,568 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:43:40,568 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:43:40,569 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:43:40,571 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:43:40,571 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:43:40,572 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:43:40,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:43:40,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:43:40,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:43:40,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:43:40,581 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:43:40,582 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:43:40,582 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:43:40,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:43:40,583 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:43:40,584 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:43:40,590 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:43:40,623 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:43:40,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:43:40,624 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:43:40,624 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:43:40,625 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:43:40,626 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:43:40,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:43:40,626 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:43:40,627 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:43:40,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:43:40,628 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:43:40,628 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:43:40,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:43:40,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:43:40,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:43:40,629 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:43:40,629 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:43:40,629 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:43:40,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:43:40,630 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:43:40,630 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:43:40,630 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:43:40,631 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:43:40,631 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:43:40,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:43:40,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:43:40,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:43:40,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:43:40,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:43:40,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:43:40,632 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:43:40,633 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:43:40,633 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:43:40,633 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:43:40,633 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:43:40,634 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:43:40,634 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:43:40,634 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:43:40,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:43:40,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:43:40,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:43:40,982 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:43:40,982 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:43:40,984 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c [2023-08-30 06:43:42,159 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:43:42,351 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:43:42,352 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c [2023-08-30 06:43:42,364 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/120016f90/bf536c08d7064a6db6428adb2001342a/FLAG2c2e5d9f7 [2023-08-30 06:43:42,380 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/120016f90/bf536c08d7064a6db6428adb2001342a [2023-08-30 06:43:42,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:43:42,383 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:43:42,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:43:42,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:43:42,388 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:43:42,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:43:42" (1/1) ... [2023-08-30 06:43:42,390 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@238e83a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:42, skipping insertion in model container [2023-08-30 06:43:42,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:43:42" (1/1) ... [2023-08-30 06:43:42,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:43:42,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:43:42,564 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-more-max-array-hom.wvr.c[2586,2599] [2023-08-30 06:43:42,575 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:43:42,597 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:43:42,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:43:42,628 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-more-max-array-hom.wvr.c[2586,2599] [2023-08-30 06:43:42,640 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:43:42,652 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:43:42,689 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-more-max-array-hom.wvr.c[2586,2599] [2023-08-30 06:43:42,695 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:43:42,713 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:43:42,716 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:43:42,722 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:43:42,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:42 WrapperNode [2023-08-30 06:43:42,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:43:42,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:43:42,724 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:43:42,725 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:43:42,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:42" (1/1) ... [2023-08-30 06:43:42,755 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:42" (1/1) ... [2023-08-30 06:43:42,782 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 102 [2023-08-30 06:43:42,783 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:43:42,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:43:42,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:43:42,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:43:42,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:42" (1/1) ... [2023-08-30 06:43:42,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:42" (1/1) ... [2023-08-30 06:43:42,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:42" (1/1) ... [2023-08-30 06:43:42,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:42" (1/1) ... [2023-08-30 06:43:42,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:42" (1/1) ... [2023-08-30 06:43:42,820 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:42" (1/1) ... [2023-08-30 06:43:42,822 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:42" (1/1) ... [2023-08-30 06:43:42,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:42" (1/1) ... [2023-08-30 06:43:42,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:43:42,827 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:43:42,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:43:42,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:43:42,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:42" (1/1) ... [2023-08-30 06:43:42,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:43:42,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:43:42,858 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 06:43:42,889 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 06:43:42,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:43:42,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:43:42,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:43:42,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:43:42,912 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:43:42,912 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:43:42,912 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:43:42,912 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:43:42,912 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 06:43:42,913 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 06:43:42,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:43:42,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:43:42,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:43:42,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:43:42,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:43:42,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:43:42,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:43:42,916 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 06:43:43,037 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:43:43,039 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:43:43,592 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:43:43,736 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:43:43,736 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 06:43:43,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:43:43 BoogieIcfgContainer [2023-08-30 06:43:43,739 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:43:43,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:43:43,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:43:43,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:43:43,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:43:42" (1/3) ... [2023-08-30 06:43:43,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8ad0da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:43:43, skipping insertion in model container [2023-08-30 06:43:43,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:42" (2/3) ... [2023-08-30 06:43:43,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8ad0da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:43:43, skipping insertion in model container [2023-08-30 06:43:43,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:43:43" (3/3) ... [2023-08-30 06:43:43,748 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array-hom.wvr.c [2023-08-30 06:43:43,765 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:43:43,765 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-08-30 06:43:43,765 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:43:43,861 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 06:43:43,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 172 transitions, 368 flow [2023-08-30 06:43:43,981 INFO L130 PetriNetUnfolder]: 12/169 cut-off events. [2023-08-30 06:43:43,981 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:43:43,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 169 events. 12/169 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 206 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 120. Up to 2 conditions per place. [2023-08-30 06:43:43,987 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 172 transitions, 368 flow [2023-08-30 06:43:43,994 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 165 transitions, 348 flow [2023-08-30 06:43:43,999 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:43:44,007 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 165 transitions, 348 flow [2023-08-30 06:43:44,010 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 165 transitions, 348 flow [2023-08-30 06:43:44,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 165 transitions, 348 flow [2023-08-30 06:43:44,038 INFO L130 PetriNetUnfolder]: 12/165 cut-off events. [2023-08-30 06:43:44,038 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:43:44,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 165 events. 12/165 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 204 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 120. Up to 2 conditions per place. [2023-08-30 06:43:44,041 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2023-08-30 06:43:59,742 INFO L134 LiptonReduction]: Checked pairs total: 3400 [2023-08-30 06:43:59,743 INFO L136 LiptonReduction]: Total number of compositions: 161 [2023-08-30 06:43:59,764 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:43:59,771 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;@107eb805, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:43:59,772 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2023-08-30 06:43:59,775 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 06:43:59,776 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:43:59,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:59,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:43:59,777 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:43:59,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:59,784 INFO L85 PathProgramCache]: Analyzing trace with hash 22228, now seen corresponding path program 1 times [2023-08-30 06:43:59,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:59,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [37559362] [2023-08-30 06:43:59,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:43:59,797 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 06:43:59,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:59,801 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 06:43:59,804 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 06:43:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:43:59,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:43:59,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:00,155 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:44:00,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:44:00,203 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 06:44:00,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:44:00,204 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:00,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [37559362] [2023-08-30 06:44:00,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [37559362] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:44:00,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:44:00,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:44:00,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861728815] [2023-08-30 06:44:00,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:44:00,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:44:00,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:00,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:44:00,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:44:00,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 333 [2023-08-30 06:44:00,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states 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 06:44:00,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:00,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 333 [2023-08-30 06:44:00,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:01,410 INFO L130 PetriNetUnfolder]: 5471/6966 cut-off events. [2023-08-30 06:44:01,410 INFO L131 PetriNetUnfolder]: For 94/94 co-relation queries the response was YES. [2023-08-30 06:44:01,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14066 conditions, 6966 events. 5471/6966 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 31692 event pairs, 2601 based on Foata normal form. 0/1882 useless extension candidates. Maximal degree in co-relation 6096. Up to 3485 conditions per place. [2023-08-30 06:44:01,462 INFO L137 encePairwiseOnDemand]: 323/333 looper letters, 78 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-30 06:44:01,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 83 transitions, 362 flow [2023-08-30 06:44:01,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:44:01,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:44:01,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2023-08-30 06:44:01,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2023-08-30 06:44:01,493 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2023-08-30 06:44:01,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2023-08-30 06:44:01,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:01,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2023-08-30 06:44:01,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states 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 06:44:01,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 06:44:01,517 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 06:44:01,519 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 120 flow. Second operand 3 states and 518 transitions. [2023-08-30 06:44:01,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 83 transitions, 362 flow [2023-08-30 06:44:01,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 83 transitions, 338 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 06:44:01,576 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 106 flow [2023-08-30 06:44:01,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-08-30 06:44:01,582 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2023-08-30 06:44:01,582 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 106 flow [2023-08-30 06:44:01,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states 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 06:44:01,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:01,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:44:01,609 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 06:44:01,784 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 06:44:01,784 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:01,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:01,785 INFO L85 PathProgramCache]: Analyzing trace with hash 22299, now seen corresponding path program 1 times [2023-08-30 06:44:01,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:01,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018085155] [2023-08-30 06:44:01,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:01,785 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 06:44:01,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:01,789 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 06:44:01,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 06:44:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:01,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:44:01,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:01,879 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 06:44:01,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:44:01,880 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:01,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018085155] [2023-08-30 06:44:01,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018085155] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:44:01,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:44:01,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:44:01,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145175230] [2023-08-30 06:44:01,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:44:01,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:44:01,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:01,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:44:01,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:44:01,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 333 [2023-08-30 06:44:01,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states 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 06:44:01,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:01,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 333 [2023-08-30 06:44:01,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:02,385 INFO L130 PetriNetUnfolder]: 2765/3515 cut-off events. [2023-08-30 06:44:02,385 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 06:44:02,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7044 conditions, 3515 events. 2765/3515 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 14341 event pairs, 1310 based on Foata normal form. 0/913 useless extension candidates. Maximal degree in co-relation 7031. Up to 3488 conditions per place. [2023-08-30 06:44:02,436 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 41 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-30 06:44:02,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 194 flow [2023-08-30 06:44:02,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:44:02,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:44:02,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2023-08-30 06:44:02,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754754754754755 [2023-08-30 06:44:02,441 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2023-08-30 06:44:02,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2023-08-30 06:44:02,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:02,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2023-08-30 06:44:02,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states 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 06:44:02,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 06:44:02,447 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 06:44:02,447 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 106 flow. Second operand 3 states and 475 transitions. [2023-08-30 06:44:02,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 194 flow [2023-08-30 06:44:02,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:44:02,450 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 116 flow [2023-08-30 06:44:02,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-08-30 06:44:02,451 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -8 predicate places. [2023-08-30 06:44:02,451 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 116 flow [2023-08-30 06:44:02,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states 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 06:44:02,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:02,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:44:02,463 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 06:44:02,660 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 06:44:02,661 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:02,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:02,661 INFO L85 PathProgramCache]: Analyzing trace with hash 22229, now seen corresponding path program 1 times [2023-08-30 06:44:02,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:02,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1991215930] [2023-08-30 06:44:02,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:02,663 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 06:44:02,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:02,664 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 06:44:02,667 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 06:44:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:02,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:44:02,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:02,791 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:44:02,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:44:02,814 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 06:44:02,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:44:02,814 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:02,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1991215930] [2023-08-30 06:44:02,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1991215930] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:44:02,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:44:02,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:44:02,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491511518] [2023-08-30 06:44:02,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:44:02,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:44:02,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:02,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:44:02,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:44:02,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 333 [2023-08-30 06:44:02,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states 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 06:44:02,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:02,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 333 [2023-08-30 06:44:02,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:03,329 INFO L130 PetriNetUnfolder]: 2765/3513 cut-off events. [2023-08-30 06:44:03,330 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 06:44:03,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7046 conditions, 3513 events. 2765/3513 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 14348 event pairs, 1310 based on Foata normal form. 2/914 useless extension candidates. Maximal degree in co-relation 7032. Up to 3487 conditions per place. [2023-08-30 06:44:03,354 INFO L137 encePairwiseOnDemand]: 331/333 looper letters, 40 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-08-30 06:44:03,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 196 flow [2023-08-30 06:44:03,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:44:03,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:44:03,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-08-30 06:44:03,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4644644644644645 [2023-08-30 06:44:03,357 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-08-30 06:44:03,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-08-30 06:44:03,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:03,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-08-30 06:44:03,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states 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 06:44:03,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 06:44:03,361 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 06:44:03,361 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 116 flow. Second operand 3 states and 464 transitions. [2023-08-30 06:44:03,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 196 flow [2023-08-30 06:44:03,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 44 transitions, 190 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 06:44:03,367 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 110 flow [2023-08-30 06:44:03,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2023-08-30 06:44:03,368 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -9 predicate places. [2023-08-30 06:44:03,369 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 110 flow [2023-08-30 06:44:03,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states 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 06:44:03,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:03,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:44:03,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 06:44:03,580 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 06:44:03,581 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:03,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:03,585 INFO L85 PathProgramCache]: Analyzing trace with hash 691115, now seen corresponding path program 1 times [2023-08-30 06:44:03,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:03,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980528193] [2023-08-30 06:44:03,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:03,587 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 06:44:03,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:03,588 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 06:44:03,591 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 06:44:03,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:03,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:44:03,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:03,786 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:44:03,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:44:03,857 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 06:44:03,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:44:04,045 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 06:44:04,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:04,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980528193] [2023-08-30 06:44:04,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980528193] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:44:04,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:44:04,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:44:04,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106073136] [2023-08-30 06:44:04,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:44:04,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:44:04,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:04,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:44:04,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:44:04,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 333 [2023-08-30 06:44:04,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 110 flow. Second operand has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states 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 06:44:04,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:04,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 333 [2023-08-30 06:44:04,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:05,647 INFO L130 PetriNetUnfolder]: 5477/6973 cut-off events. [2023-08-30 06:44:05,648 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 06:44:05,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13976 conditions, 6973 events. 5477/6973 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 31537 event pairs, 2601 based on Foata normal form. 0/1889 useless extension candidates. Maximal degree in co-relation 13967. Up to 3484 conditions per place. [2023-08-30 06:44:05,681 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 76 selfloop transitions, 11 changer transitions 0/90 dead transitions. [2023-08-30 06:44:05,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 90 transitions, 406 flow [2023-08-30 06:44:05,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:44:05,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:44:05,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 906 transitions. [2023-08-30 06:44:05,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45345345345345345 [2023-08-30 06:44:05,685 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 906 transitions. [2023-08-30 06:44:05,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 906 transitions. [2023-08-30 06:44:05,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:05,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 906 transitions. [2023-08-30 06:44:05,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:05,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 333.0) internal successors, (2331), 7 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states 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 06:44:05,692 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 333.0) internal successors, (2331), 7 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states 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 06:44:05,693 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 110 flow. Second operand 6 states and 906 transitions. [2023-08-30 06:44:05,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 90 transitions, 406 flow [2023-08-30 06:44:05,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 90 transitions, 405 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:44:05,695 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 207 flow [2023-08-30 06:44:05,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2023-08-30 06:44:05,696 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2023-08-30 06:44:05,696 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 207 flow [2023-08-30 06:44:05,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states 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 06:44:05,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:05,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:44:05,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 06:44:05,906 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 06:44:05,906 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:05,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:05,906 INFO L85 PathProgramCache]: Analyzing trace with hash 691186, now seen corresponding path program 1 times [2023-08-30 06:44:05,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:05,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [673520175] [2023-08-30 06:44:05,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:05,907 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 06:44:05,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:05,908 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 06:44:05,910 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 06:44:05,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:05,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:44:05,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:06,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:44:06,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:44:06,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:44:06,070 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2023-08-30 06:44:06,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 33 [2023-08-30 06:44:06,094 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 06:44:06,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 06:44:06,158 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 06:44:06,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:44:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:44:06,264 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:06,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [673520175] [2023-08-30 06:44:06,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [673520175] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 06:44:06,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 06:44:06,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-08-30 06:44:06,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843008520] [2023-08-30 06:44:06,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:44:06,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:44:06,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:06,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:44:06,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:44:06,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 333 [2023-08-30 06:44:06,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 207 flow. Second operand has 4 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 0 states 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 06:44:06,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:06,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 333 [2023-08-30 06:44:06,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:07,207 INFO L130 PetriNetUnfolder]: 4373/5617 cut-off events. [2023-08-30 06:44:07,208 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 06:44:07,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11297 conditions, 5617 events. 4373/5617 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 25204 event pairs, 2060 based on Foata normal form. 0/1567 useless extension candidates. Maximal degree in co-relation 11283. Up to 5565 conditions per place. [2023-08-30 06:44:07,238 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 45 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-08-30 06:44:07,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 273 flow [2023-08-30 06:44:07,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:44:07,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:44:07,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 439 transitions. [2023-08-30 06:44:07,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4394394394394394 [2023-08-30 06:44:07,241 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 439 transitions. [2023-08-30 06:44:07,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 439 transitions. [2023-08-30 06:44:07,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:07,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 439 transitions. [2023-08-30 06:44:07,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states 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 06:44:07,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 06:44:07,247 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 06:44:07,247 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 207 flow. Second operand 3 states and 439 transitions. [2023-08-30 06:44:07,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 273 flow [2023-08-30 06:44:07,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 255 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-30 06:44:07,254 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 165 flow [2023-08-30 06:44:07,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2023-08-30 06:44:07,257 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-08-30 06:44:07,257 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 165 flow [2023-08-30 06:44:07,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 0 states 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 06:44:07,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:07,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:44:07,270 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 06:44:07,467 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 06:44:07,467 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:07,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:07,468 INFO L85 PathProgramCache]: Analyzing trace with hash 691187, now seen corresponding path program 1 times [2023-08-30 06:44:07,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:07,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955338685] [2023-08-30 06:44:07,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:07,469 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 06:44:07,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:07,470 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 06:44:07,471 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 06:44:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:07,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:44:07,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:07,630 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2023-08-30 06:44:07,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2023-08-30 06:44:07,709 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 06:44:07,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:44:07,710 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:07,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955338685] [2023-08-30 06:44:07,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955338685] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:44:07,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:44:07,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:44:07,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41789054] [2023-08-30 06:44:07,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:44:07,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:44:07,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:07,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:44:07,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:44:07,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 333 [2023-08-30 06:44:07,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states 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 06:44:07,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:07,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 333 [2023-08-30 06:44:07,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:08,324 INFO L130 PetriNetUnfolder]: 3211/4203 cut-off events. [2023-08-30 06:44:08,325 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 06:44:08,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8452 conditions, 4203 events. 3211/4203 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 18838 event pairs, 1500 based on Foata normal form. 0/1307 useless extension candidates. Maximal degree in co-relation 8437. Up to 4151 conditions per place. [2023-08-30 06:44:08,348 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 41 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-30 06:44:08,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 45 transitions, 227 flow [2023-08-30 06:44:08,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:44:08,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:44:08,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2023-08-30 06:44:08,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46146146146146144 [2023-08-30 06:44:08,351 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2023-08-30 06:44:08,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2023-08-30 06:44:08,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:08,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2023-08-30 06:44:08,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states 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 06:44:08,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 06:44:08,355 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 06:44:08,355 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 165 flow. Second operand 3 states and 461 transitions. [2023-08-30 06:44:08,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 45 transitions, 227 flow [2023-08-30 06:44:08,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 45 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:44:08,357 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 144 flow [2023-08-30 06:44:08,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2023-08-30 06:44:08,358 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2023-08-30 06:44:08,358 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 144 flow [2023-08-30 06:44:08,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states 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 06:44:08,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:08,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:44:08,367 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 06:44:08,567 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 06:44:08,567 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:08,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:08,568 INFO L85 PathProgramCache]: Analyzing trace with hash 664247777, now seen corresponding path program 1 times [2023-08-30 06:44:08,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:08,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474176092] [2023-08-30 06:44:08,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:08,568 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 06:44:08,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:08,569 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 06:44:08,571 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 06:44:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:08,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 06:44:08,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:08,712 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2023-08-30 06:44:08,713 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 4 case distinctions, treesize of input 29 treesize of output 44 [2023-08-30 06:44:08,743 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 06:44:08,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:44:08,743 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:08,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474176092] [2023-08-30 06:44:08,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474176092] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:44:08,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:44:08,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:44:08,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817248053] [2023-08-30 06:44:08,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:44:08,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:44:08,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:08,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:44:08,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:44:08,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 333 [2023-08-30 06:44:08,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states 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 06:44:08,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:08,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 333 [2023-08-30 06:44:08,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:09,164 INFO L130 PetriNetUnfolder]: 3037/3969 cut-off events. [2023-08-30 06:44:09,165 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 06:44:09,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7985 conditions, 3969 events. 3037/3969 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 17528 event pairs, 1414 based on Foata normal form. 0/1263 useless extension candidates. Maximal degree in co-relation 7969. Up to 3917 conditions per place. [2023-08-30 06:44:09,185 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 39 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-30 06:44:09,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 43 transitions, 220 flow [2023-08-30 06:44:09,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:44:09,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:44:09,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-08-30 06:44:09,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45045045045045046 [2023-08-30 06:44:09,187 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-08-30 06:44:09,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-08-30 06:44:09,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:09,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-08-30 06:44:09,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states 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 06:44:09,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 06:44:09,190 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 06:44:09,190 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 144 flow. Second operand 3 states and 450 transitions. [2023-08-30 06:44:09,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 43 transitions, 220 flow [2023-08-30 06:44:09,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 43 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:44:09,192 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 141 flow [2023-08-30 06:44:09,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2023-08-30 06:44:09,193 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -4 predicate places. [2023-08-30 06:44:09,193 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 141 flow [2023-08-30 06:44:09,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states 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 06:44:09,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:09,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:44:09,205 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 06:44:09,403 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 06:44:09,403 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:09,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:09,404 INFO L85 PathProgramCache]: Analyzing trace with hash 664247778, now seen corresponding path program 1 times [2023-08-30 06:44:09,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:09,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623136171] [2023-08-30 06:44:09,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:09,404 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 06:44:09,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:09,405 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 06:44:09,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 06:44:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:09,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:44:09,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:09,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:44:09,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:44:09,594 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2023-08-30 06:44:09,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2023-08-30 06:44:09,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 06:44:09,778 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 06:44:09,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:44:09,960 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 06:44:09,960 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:09,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [623136171] [2023-08-30 06:44:09,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [623136171] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:44:09,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:44:09,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:44:09,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549544448] [2023-08-30 06:44:09,961 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:44:09,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:44:09,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:09,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:44:09,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:44:11,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:44:14,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:44:14,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 06:44:14,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 141 flow. Second operand has 8 states, 8 states have (on average 133.25) internal successors, (1066), 8 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states 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 06:44:14,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:14,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 06:44:14,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:15,210 INFO L130 PetriNetUnfolder]: 2815/3687 cut-off events. [2023-08-30 06:44:15,210 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 06:44:15,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7417 conditions, 3687 events. 2815/3687 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 16184 event pairs, 1319 based on Foata normal form. 0/1242 useless extension candidates. Maximal degree in co-relation 7400. Up to 1838 conditions per place. [2023-08-30 06:44:15,228 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 64 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2023-08-30 06:44:15,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 341 flow [2023-08-30 06:44:15,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:44:15,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:44:15,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 727 transitions. [2023-08-30 06:44:15,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43663663663663665 [2023-08-30 06:44:15,231 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 727 transitions. [2023-08-30 06:44:15,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 727 transitions. [2023-08-30 06:44:15,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:15,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 727 transitions. [2023-08-30 06:44:15,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.4) internal successors, (727), 5 states have internal predecessors, (727), 0 states have call successors, (0), 0 states 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 06:44:15,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states 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 06:44:15,237 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states 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 06:44:15,237 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 141 flow. Second operand 5 states and 727 transitions. [2023-08-30 06:44:15,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 341 flow [2023-08-30 06:44:15,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 70 transitions, 340 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:44:15,239 INFO L231 Difference]: Finished difference. Result has 54 places, 41 transitions, 142 flow [2023-08-30 06:44:15,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=54, PETRI_TRANSITIONS=41} [2023-08-30 06:44:15,239 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2023-08-30 06:44:15,240 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 41 transitions, 142 flow [2023-08-30 06:44:15,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 133.25) internal successors, (1066), 8 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states 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 06:44:15,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:15,240 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:44:15,252 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 (9)] Ended with exit code 0 [2023-08-30 06:44:15,449 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 06:44:15,450 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:15,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:15,450 INFO L85 PathProgramCache]: Analyzing trace with hash -883796844, now seen corresponding path program 2 times [2023-08-30 06:44:15,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:15,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142890321] [2023-08-30 06:44:15,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:44:15,451 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 06:44:15,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:15,456 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 06:44:15,460 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 (10)] Waiting until timeout for monitored process [2023-08-30 06:44:15,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:44:15,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:44:15,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 06:44:15,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:15,644 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:44:15,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:44:15,772 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 06:44:15,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:44:16,296 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 06:44:16,296 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:16,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142890321] [2023-08-30 06:44:16,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142890321] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:44:16,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:44:16,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:44:16,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917307802] [2023-08-30 06:44:16,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:44:16,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:44:16,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:16,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:44:16,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:44:18,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 333 [2023-08-30 06:44:18,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 142 flow. Second operand has 12 states, 12 states have (on average 138.0) internal successors, (1656), 12 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states 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 06:44:18,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:18,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 333 [2023-08-30 06:44:18,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:22,897 INFO L130 PetriNetUnfolder]: 12488/16397 cut-off events. [2023-08-30 06:44:22,897 INFO L131 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2023-08-30 06:44:22,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32864 conditions, 16397 events. 12488/16397 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 85941 event pairs, 5904 based on Foata normal form. 6/5649 useless extension candidates. Maximal degree in co-relation 32846. Up to 1838 conditions per place. [2023-08-30 06:44:22,955 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 263 selfloop transitions, 12 changer transitions 0/278 dead transitions. [2023-08-30 06:44:22,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 278 transitions, 1268 flow [2023-08-30 06:44:22,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 06:44:22,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 06:44:22,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1925 transitions. [2023-08-30 06:44:22,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817317317317317 [2023-08-30 06:44:22,962 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1925 transitions. [2023-08-30 06:44:22,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1925 transitions. [2023-08-30 06:44:22,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:22,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1925 transitions. [2023-08-30 06:44:22,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 160.41666666666666) internal successors, (1925), 12 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states 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 06:44:22,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 333.0) internal successors, (4329), 13 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states 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 06:44:22,973 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 333.0) internal successors, (4329), 13 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states 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 06:44:22,973 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 142 flow. Second operand 12 states and 1925 transitions. [2023-08-30 06:44:22,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 278 transitions, 1268 flow [2023-08-30 06:44:22,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 278 transitions, 1263 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 06:44:22,977 INFO L231 Difference]: Finished difference. Result has 69 places, 48 transitions, 235 flow [2023-08-30 06:44:22,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=235, PETRI_PLACES=69, PETRI_TRANSITIONS=48} [2023-08-30 06:44:22,978 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 12 predicate places. [2023-08-30 06:44:22,978 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 48 transitions, 235 flow [2023-08-30 06:44:22,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 138.0) internal successors, (1656), 12 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states 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 06:44:22,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:22,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:44:22,989 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 06:44:23,188 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 06:44:23,188 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:23,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:23,189 INFO L85 PathProgramCache]: Analyzing trace with hash -883160533, now seen corresponding path program 1 times [2023-08-30 06:44:23,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:23,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859939601] [2023-08-30 06:44:23,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:23,189 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 06:44:23,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:23,190 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 06:44:23,193 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 06:44:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:23,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:44:23,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:23,315 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 06:44:23,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:44:23,480 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 25 treesize of output 21 [2023-08-30 06:44:23,547 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 06:44:23,547 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:23,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859939601] [2023-08-30 06:44:23,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859939601] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:44:23,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:44:23,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:44:23,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610134904] [2023-08-30 06:44:23,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:44:23,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:44:23,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:23,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:44:23,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:44:25,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 333 [2023-08-30 06:44:25,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 48 transitions, 235 flow. Second operand has 10 states, 10 states have (on average 135.2) internal successors, (1352), 10 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states 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 06:44:25,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:25,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 333 [2023-08-30 06:44:25,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:27,297 INFO L130 PetriNetUnfolder]: 19046/25547 cut-off events. [2023-08-30 06:44:27,297 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2023-08-30 06:44:27,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51395 conditions, 25547 events. 19046/25547 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 1235. Compared 150364 event pairs, 5962 based on Foata normal form. 0/9605 useless extension candidates. Maximal degree in co-relation 51370. Up to 12945 conditions per place. [2023-08-30 06:44:27,444 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 116 selfloop transitions, 12 changer transitions 0/130 dead transitions. [2023-08-30 06:44:27,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 130 transitions, 677 flow [2023-08-30 06:44:27,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 06:44:27,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 06:44:27,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1325 transitions. [2023-08-30 06:44:27,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44210877544210875 [2023-08-30 06:44:27,448 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1325 transitions. [2023-08-30 06:44:27,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1325 transitions. [2023-08-30 06:44:27,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:27,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1325 transitions. [2023-08-30 06:44:27,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 147.22222222222223) internal successors, (1325), 9 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states 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 06:44:27,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states 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 06:44:27,458 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states 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 06:44:27,458 INFO L175 Difference]: Start difference. First operand has 69 places, 48 transitions, 235 flow. Second operand 9 states and 1325 transitions. [2023-08-30 06:44:27,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 130 transitions, 677 flow [2023-08-30 06:44:27,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 130 transitions, 652 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 06:44:27,465 INFO L231 Difference]: Finished difference. Result has 75 places, 52 transitions, 260 flow [2023-08-30 06:44:27,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=260, PETRI_PLACES=75, PETRI_TRANSITIONS=52} [2023-08-30 06:44:27,466 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 18 predicate places. [2023-08-30 06:44:27,466 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 52 transitions, 260 flow [2023-08-30 06:44:27,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 135.2) internal successors, (1352), 10 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states 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 06:44:27,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:27,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:44:27,478 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 06:44:27,676 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 06:44:27,676 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:27,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:27,677 INFO L85 PathProgramCache]: Analyzing trace with hash -883160534, now seen corresponding path program 1 times [2023-08-30 06:44:27,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:27,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [242867213] [2023-08-30 06:44:27,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:27,677 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 06:44:27,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:27,678 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 06:44:27,679 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 06:44:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:27,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 06:44:27,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:27,803 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:44:27,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:44:27,824 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 06:44:27,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:44:27,824 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:27,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [242867213] [2023-08-30 06:44:27,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [242867213] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:44:27,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:44:27,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:44:27,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369087242] [2023-08-30 06:44:27,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:44:27,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:44:27,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:27,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:44:27,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:44:27,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 333 [2023-08-30 06:44:27,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 52 transitions, 260 flow. Second operand has 4 states, 4 states have (on average 137.25) internal successors, (549), 4 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:27,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:27,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 333 [2023-08-30 06:44:27,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:28,883 INFO L130 PetriNetUnfolder]: 8201/11381 cut-off events. [2023-08-30 06:44:28,883 INFO L131 PetriNetUnfolder]: For 2202/2599 co-relation queries the response was YES. [2023-08-30 06:44:28,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25408 conditions, 11381 events. 8201/11381 cut-off events. For 2202/2599 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 64501 event pairs, 4347 based on Foata normal form. 397/6056 useless extension candidates. Maximal degree in co-relation 25380. Up to 11188 conditions per place. [2023-08-30 06:44:28,932 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 39 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2023-08-30 06:44:28,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 49 transitions, 344 flow [2023-08-30 06:44:28,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:44:28,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:44:28,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 576 transitions. [2023-08-30 06:44:28,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2023-08-30 06:44:28,934 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 576 transitions. [2023-08-30 06:44:28,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 576 transitions. [2023-08-30 06:44:28,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:28,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 576 transitions. [2023-08-30 06:44:28,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states 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 06:44:28,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states 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 06:44:28,938 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states 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 06:44:28,938 INFO L175 Difference]: Start difference. First operand has 75 places, 52 transitions, 260 flow. Second operand 4 states and 576 transitions. [2023-08-30 06:44:28,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 49 transitions, 344 flow [2023-08-30 06:44:28,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 49 transitions, 327 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-30 06:44:28,943 INFO L231 Difference]: Finished difference. Result has 71 places, 49 transitions, 249 flow [2023-08-30 06:44:28,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=249, PETRI_PLACES=71, PETRI_TRANSITIONS=49} [2023-08-30 06:44:28,944 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 14 predicate places. [2023-08-30 06:44:28,944 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 49 transitions, 249 flow [2023-08-30 06:44:28,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.25) internal successors, (549), 4 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:28,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:28,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:44:28,957 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 06:44:29,153 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 06:44:29,154 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:29,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:29,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1608170044, now seen corresponding path program 1 times [2023-08-30 06:44:29,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:29,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639281248] [2023-08-30 06:44:29,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:29,156 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 06:44:29,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:29,157 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 06:44:29,159 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 06:44:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:29,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 06:44:29,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:29,337 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:44:29,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:44:29,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:44:29,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:44:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:44:29,873 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:29,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639281248] [2023-08-30 06:44:29,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639281248] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:44:29,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:44:29,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:44:29,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962160486] [2023-08-30 06:44:29,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:44:29,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:44:29,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:29,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:44:29,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:44:32,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 333 [2023-08-30 06:44:32,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 49 transitions, 249 flow. Second operand has 10 states, 10 states have (on average 135.4) internal successors, (1354), 10 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states 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 06:44:32,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:32,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 333 [2023-08-30 06:44:32,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:34,597 INFO L130 PetriNetUnfolder]: 15014/19985 cut-off events. [2023-08-30 06:44:34,598 INFO L131 PetriNetUnfolder]: For 2397/2397 co-relation queries the response was YES. [2023-08-30 06:44:34,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46038 conditions, 19985 events. 15014/19985 cut-off events. For 2397/2397 co-relation queries the response was YES. Maximal size of possible extension queue 935. Compared 112111 event pairs, 972 based on Foata normal form. 450/11453 useless extension candidates. Maximal degree in co-relation 46011. Up to 6057 conditions per place. [2023-08-30 06:44:34,686 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 98 selfloop transitions, 15 changer transitions 0/115 dead transitions. [2023-08-30 06:44:34,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 115 transitions, 630 flow [2023-08-30 06:44:34,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 06:44:34,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 06:44:34,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1173 transitions. [2023-08-30 06:44:34,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403153153153153 [2023-08-30 06:44:34,691 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1173 transitions. [2023-08-30 06:44:34,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1173 transitions. [2023-08-30 06:44:34,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:34,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1173 transitions. [2023-08-30 06:44:34,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 146.625) internal successors, (1173), 8 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states 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 06:44:34,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 333.0) internal successors, (2997), 9 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states 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 06:44:34,698 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 333.0) internal successors, (2997), 9 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states 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 06:44:34,698 INFO L175 Difference]: Start difference. First operand has 71 places, 49 transitions, 249 flow. Second operand 8 states and 1173 transitions. [2023-08-30 06:44:34,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 115 transitions, 630 flow [2023-08-30 06:44:34,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 115 transitions, 619 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 06:44:34,705 INFO L231 Difference]: Finished difference. Result has 81 places, 54 transitions, 327 flow [2023-08-30 06:44:34,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=327, PETRI_PLACES=81, PETRI_TRANSITIONS=54} [2023-08-30 06:44:34,705 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 24 predicate places. [2023-08-30 06:44:34,706 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 54 transitions, 327 flow [2023-08-30 06:44:34,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 135.4) internal successors, (1354), 10 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states 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 06:44:34,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:34,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:44:34,717 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 (13)] Ended with exit code 0 [2023-08-30 06:44:34,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:34,916 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:34,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:34,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1607998129, now seen corresponding path program 1 times [2023-08-30 06:44:34,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:34,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390289577] [2023-08-30 06:44:34,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:34,917 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 06:44:34,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:34,918 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:44:34,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 06:44:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:35,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 06:44:35,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:35,099 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:44:35,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:44:35,256 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 06:44:35,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:44:35,419 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 06:44:35,420 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:35,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390289577] [2023-08-30 06:44:35,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390289577] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:44:35,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:44:35,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:44:35,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384933471] [2023-08-30 06:44:35,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:44:35,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:44:35,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:35,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:44:35,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:44:35,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 06:44:35,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 54 transitions, 327 flow. Second operand has 8 states, 8 states have (on average 133.75) internal successors, (1070), 8 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 06:44:35,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:35,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 06:44:35,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:37,539 INFO L130 PetriNetUnfolder]: 12187/16357 cut-off events. [2023-08-30 06:44:37,539 INFO L131 PetriNetUnfolder]: For 23291/24703 co-relation queries the response was YES. [2023-08-30 06:44:37,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45980 conditions, 16357 events. 12187/16357 cut-off events. For 23291/24703 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 89248 event pairs, 6328 based on Foata normal form. 1412/11084 useless extension candidates. Maximal degree in co-relation 45948. Up to 14340 conditions per place. [2023-08-30 06:44:37,632 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 73 selfloop transitions, 3 changer transitions 0/80 dead transitions. [2023-08-30 06:44:37,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 80 transitions, 591 flow [2023-08-30 06:44:37,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:44:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:44:37,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 717 transitions. [2023-08-30 06:44:37,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4306306306306306 [2023-08-30 06:44:37,634 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 717 transitions. [2023-08-30 06:44:37,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 717 transitions. [2023-08-30 06:44:37,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:37,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 717 transitions. [2023-08-30 06:44:37,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.4) internal successors, (717), 5 states have internal predecessors, (717), 0 states have call successors, (0), 0 states 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 06:44:37,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states 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 06:44:37,638 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states 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 06:44:37,638 INFO L175 Difference]: Start difference. First operand has 81 places, 54 transitions, 327 flow. Second operand 5 states and 717 transitions. [2023-08-30 06:44:37,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 80 transitions, 591 flow [2023-08-30 06:44:37,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 80 transitions, 552 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-08-30 06:44:37,656 INFO L231 Difference]: Finished difference. Result has 80 places, 52 transitions, 304 flow [2023-08-30 06:44:37,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=304, PETRI_PLACES=80, PETRI_TRANSITIONS=52} [2023-08-30 06:44:37,657 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 23 predicate places. [2023-08-30 06:44:37,657 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 52 transitions, 304 flow [2023-08-30 06:44:37,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 133.75) internal successors, (1070), 8 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 06:44:37,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:37,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:44:37,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 06:44:37,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:37,858 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:37,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:37,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1607998130, now seen corresponding path program 1 times [2023-08-30 06:44:37,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:37,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [411700684] [2023-08-30 06:44:37,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:37,859 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 06:44:37,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:37,861 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:44:37,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 06:44:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:37,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:44:37,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:38,054 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2023-08-30 06:44:38,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 46 [2023-08-30 06:44:38,083 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 06:44:38,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:44:38,084 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:38,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [411700684] [2023-08-30 06:44:38,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [411700684] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:44:38,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:44:38,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:44:38,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525233651] [2023-08-30 06:44:38,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:44:38,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:44:38,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:38,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:44:38,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:44:38,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 333 [2023-08-30 06:44:38,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 52 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states 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 06:44:38,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:38,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 333 [2023-08-30 06:44:38,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:39,362 INFO L130 PetriNetUnfolder]: 11441/15251 cut-off events. [2023-08-30 06:44:39,362 INFO L131 PetriNetUnfolder]: For 20612/21912 co-relation queries the response was YES. [2023-08-30 06:44:39,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40142 conditions, 15251 events. 11441/15251 cut-off events. For 20612/21912 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 81125 event pairs, 5832 based on Foata normal form. 1300/10306 useless extension candidates. Maximal degree in co-relation 40110. Up to 15062 conditions per place. [2023-08-30 06:44:39,502 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 45 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-08-30 06:44:39,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 50 transitions, 392 flow [2023-08-30 06:44:39,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:44:39,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:44:39,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2023-08-30 06:44:39,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44144144144144143 [2023-08-30 06:44:39,504 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2023-08-30 06:44:39,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2023-08-30 06:44:39,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:39,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2023-08-30 06:44:39,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states 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 06:44:39,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 06:44:39,507 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 06:44:39,507 INFO L175 Difference]: Start difference. First operand has 80 places, 52 transitions, 304 flow. Second operand 3 states and 441 transitions. [2023-08-30 06:44:39,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 50 transitions, 392 flow [2023-08-30 06:44:39,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 50 transitions, 387 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 06:44:39,523 INFO L231 Difference]: Finished difference. Result has 77 places, 50 transitions, 297 flow [2023-08-30 06:44:39,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=297, PETRI_PLACES=77, PETRI_TRANSITIONS=50} [2023-08-30 06:44:39,524 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 20 predicate places. [2023-08-30 06:44:39,524 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 50 transitions, 297 flow [2023-08-30 06:44:39,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states 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 06:44:39,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:39,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:44:39,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 06:44:39,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:39,729 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:39,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:39,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1691660640, now seen corresponding path program 1 times [2023-08-30 06:44:39,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:39,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393429404] [2023-08-30 06:44:39,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:39,730 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:39,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:39,731 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:44:39,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 06:44:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:39,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:44:39,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:39,944 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 06:44:39,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:44:40,144 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 25 treesize of output 21 [2023-08-30 06:44:40,196 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 06:44:40,196 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:40,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393429404] [2023-08-30 06:44:40,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393429404] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:44:40,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:44:40,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:44:40,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461919113] [2023-08-30 06:44:40,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:44:40,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:44:40,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:40,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:44:40,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:44:42,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 333 [2023-08-30 06:44:42,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 50 transitions, 297 flow. Second operand has 10 states, 10 states have (on average 135.6) internal successors, (1356), 10 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states 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 06:44:42,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:42,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 333 [2023-08-30 06:44:42,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:44,094 INFO L130 PetriNetUnfolder]: 15405/21123 cut-off events. [2023-08-30 06:44:44,094 INFO L131 PetriNetUnfolder]: For 31851/33943 co-relation queries the response was YES. [2023-08-30 06:44:44,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57061 conditions, 21123 events. 15405/21123 cut-off events. For 31851/33943 co-relation queries the response was YES. Maximal size of possible extension queue 964. Compared 121446 event pairs, 4989 based on Foata normal form. 2092/16269 useless extension candidates. Maximal degree in co-relation 57029. Up to 12297 conditions per place. [2023-08-30 06:44:44,237 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 108 selfloop transitions, 12 changer transitions 0/123 dead transitions. [2023-08-30 06:44:44,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 123 transitions, 825 flow [2023-08-30 06:44:44,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 06:44:44,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 06:44:44,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1293 transitions. [2023-08-30 06:44:44,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314314314314314 [2023-08-30 06:44:44,241 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1293 transitions. [2023-08-30 06:44:44,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1293 transitions. [2023-08-30 06:44:44,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:44,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1293 transitions. [2023-08-30 06:44:44,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 143.66666666666666) internal successors, (1293), 9 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states 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 06:44:44,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states 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 06:44:44,248 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states 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 06:44:44,248 INFO L175 Difference]: Start difference. First operand has 77 places, 50 transitions, 297 flow. Second operand 9 states and 1293 transitions. [2023-08-30 06:44:44,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 123 transitions, 825 flow [2023-08-30 06:44:44,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 123 transitions, 824 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:44:44,270 INFO L231 Difference]: Finished difference. Result has 86 places, 53 transitions, 338 flow [2023-08-30 06:44:44,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=338, PETRI_PLACES=86, PETRI_TRANSITIONS=53} [2023-08-30 06:44:44,270 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 29 predicate places. [2023-08-30 06:44:44,271 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 53 transitions, 338 flow [2023-08-30 06:44:44,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 135.6) internal successors, (1356), 10 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states 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 06:44:44,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:44,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:44:44,289 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 (16)] Forceful destruction successful, exit code 0 [2023-08-30 06:44:44,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:44,481 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:44,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:44,482 INFO L85 PathProgramCache]: Analyzing trace with hash 901875931, now seen corresponding path program 1 times [2023-08-30 06:44:44,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:44,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1375342210] [2023-08-30 06:44:44,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:44,482 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 06:44:44,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:44,484 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:44:44,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 06:44:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:44,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 06:44:44,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:44,666 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:44:44,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:44:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:44:44,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:44:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:44:45,202 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:45,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1375342210] [2023-08-30 06:44:45,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1375342210] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:44:45,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:44:45,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:44:45,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137735180] [2023-08-30 06:44:45,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:44:45,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:44:45,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:45,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:44:45,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:44:47,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 06:44:47,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 53 transitions, 338 flow. Second operand has 10 states, 10 states have (on average 133.8) internal successors, (1338), 10 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states 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 06:44:47,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:47,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 06:44:47,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:51,396 INFO L130 PetriNetUnfolder]: 29369/39767 cut-off events. [2023-08-30 06:44:51,396 INFO L131 PetriNetUnfolder]: For 68699/72591 co-relation queries the response was YES. [2023-08-30 06:44:51,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117322 conditions, 39767 events. 29369/39767 cut-off events. For 68699/72591 co-relation queries the response was YES. Maximal size of possible extension queue 1692. Compared 244947 event pairs, 3798 based on Foata normal form. 3892/34435 useless extension candidates. Maximal degree in co-relation 117287. Up to 9937 conditions per place. [2023-08-30 06:44:51,789 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 144 selfloop transitions, 15 changer transitions 0/162 dead transitions. [2023-08-30 06:44:51,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 162 transitions, 1142 flow [2023-08-30 06:44:51,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 06:44:51,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 06:44:51,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1292 transitions. [2023-08-30 06:44:51,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43109776443109776 [2023-08-30 06:44:51,794 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1292 transitions. [2023-08-30 06:44:51,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1292 transitions. [2023-08-30 06:44:51,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:51,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1292 transitions. [2023-08-30 06:44:51,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 143.55555555555554) internal successors, (1292), 9 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:51,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states 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 06:44:51,800 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states 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 06:44:51,800 INFO L175 Difference]: Start difference. First operand has 86 places, 53 transitions, 338 flow. Second operand 9 states and 1292 transitions. [2023-08-30 06:44:51,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 162 transitions, 1142 flow [2023-08-30 06:44:51,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 162 transitions, 1131 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 06:44:51,839 INFO L231 Difference]: Finished difference. Result has 94 places, 58 transitions, 409 flow [2023-08-30 06:44:51,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=409, PETRI_PLACES=94, PETRI_TRANSITIONS=58} [2023-08-30 06:44:51,840 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 37 predicate places. [2023-08-30 06:44:51,840 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 58 transitions, 409 flow [2023-08-30 06:44:51,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 133.8) internal successors, (1338), 10 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states 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 06:44:51,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:51,841 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 06:44:51,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 06:44:52,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:52,051 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:52,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:52,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1369090155, now seen corresponding path program 2 times [2023-08-30 06:44:52,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:52,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180110451] [2023-08-30 06:44:52,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:44:52,052 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 06:44:52,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:52,053 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:44:52,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 06:44:52,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:44:52,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:44:52,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 06:44:52,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:52,238 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:44:52,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:44:52,488 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:44:52,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:44:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:44:53,519 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:53,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180110451] [2023-08-30 06:44:53,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180110451] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:44:53,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:44:53,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 06:44:53,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599982951] [2023-08-30 06:44:53,520 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:44:53,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 06:44:53,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:53,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 06:44:53,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-08-30 06:45:03,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 333 [2023-08-30 06:45:03,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 58 transitions, 409 flow. Second operand has 18 states, 18 states have (on average 129.11111111111111) internal successors, (2324), 18 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states 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 06:45:03,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:03,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 333 [2023-08-30 06:45:03,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:14,662 INFO L130 PetriNetUnfolder]: 30001/40923 cut-off events. [2023-08-30 06:45:14,662 INFO L131 PetriNetUnfolder]: For 94516/97333 co-relation queries the response was YES. [2023-08-30 06:45:14,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139302 conditions, 40923 events. 30001/40923 cut-off events. For 94516/97333 co-relation queries the response was YES. Maximal size of possible extension queue 1848. Compared 259728 event pairs, 8809 based on Foata normal form. 3123/35365 useless extension candidates. Maximal degree in co-relation 139263. Up to 15994 conditions per place. [2023-08-30 06:45:15,052 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 297 selfloop transitions, 24 changer transitions 0/324 dead transitions. [2023-08-30 06:45:15,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 324 transitions, 2433 flow [2023-08-30 06:45:15,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 06:45:15,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 06:45:15,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2658 transitions. [2023-08-30 06:45:15,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42010431484115696 [2023-08-30 06:45:15,060 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2658 transitions. [2023-08-30 06:45:15,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2658 transitions. [2023-08-30 06:45:15,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:15,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2658 transitions. [2023-08-30 06:45:15,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 139.89473684210526) internal successors, (2658), 19 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states 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 06:45:15,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states 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 06:45:15,073 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states 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 06:45:15,073 INFO L175 Difference]: Start difference. First operand has 94 places, 58 transitions, 409 flow. Second operand 19 states and 2658 transitions. [2023-08-30 06:45:15,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 324 transitions, 2433 flow [2023-08-30 06:45:15,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 324 transitions, 2214 flow, removed 98 selfloop flow, removed 3 redundant places. [2023-08-30 06:45:15,191 INFO L231 Difference]: Finished difference. Result has 116 places, 70 transitions, 552 flow [2023-08-30 06:45:15,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=552, PETRI_PLACES=116, PETRI_TRANSITIONS=70} [2023-08-30 06:45:15,192 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 59 predicate places. [2023-08-30 06:45:15,192 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 70 transitions, 552 flow [2023-08-30 06:45:15,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 129.11111111111111) internal successors, (2324), 18 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states 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 06:45:15,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:15,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:45:15,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 06:45:15,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:45:15,401 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:45:15,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:45:15,402 INFO L85 PathProgramCache]: Analyzing trace with hash -2101571287, now seen corresponding path program 1 times [2023-08-30 06:45:15,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:45:15,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842623785] [2023-08-30 06:45:15,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:45:15,402 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 06:45:15,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:45:15,403 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:45:15,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 06:45:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:45:15,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 06:45:15,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:45:15,569 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:45:15,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:45:15,758 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 06:45:15,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:45:16,265 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 06:45:16,265 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:45:16,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842623785] [2023-08-30 06:45:16,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842623785] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:45:16,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:45:16,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:45:16,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934747181] [2023-08-30 06:45:16,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:45:16,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:45:16,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:45:16,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:45:16,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:45:20,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 333 [2023-08-30 06:45:20,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 70 transitions, 552 flow. Second operand has 10 states, 10 states have (on average 129.0) internal successors, (1290), 10 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states 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 06:45:20,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:20,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 333 [2023-08-30 06:45:20,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:27,124 INFO L130 PetriNetUnfolder]: 27287/38781 cut-off events. [2023-08-30 06:45:27,124 INFO L131 PetriNetUnfolder]: For 154601/161405 co-relation queries the response was YES. [2023-08-30 06:45:27,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143635 conditions, 38781 events. 27287/38781 cut-off events. For 154601/161405 co-relation queries the response was YES. Maximal size of possible extension queue 1433. Compared 248029 event pairs, 17843 based on Foata normal form. 6804/40816 useless extension candidates. Maximal degree in co-relation 143589. Up to 22069 conditions per place. [2023-08-30 06:45:27,483 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 148 selfloop transitions, 15 changer transitions 0/168 dead transitions. [2023-08-30 06:45:27,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 168 transitions, 1388 flow [2023-08-30 06:45:27,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 06:45:27,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 06:45:27,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1502 transitions. [2023-08-30 06:45:27,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41004641004641007 [2023-08-30 06:45:27,486 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1502 transitions. [2023-08-30 06:45:27,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1502 transitions. [2023-08-30 06:45:27,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:27,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1502 transitions. [2023-08-30 06:45:27,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 136.54545454545453) internal successors, (1502), 11 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states 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 06:45:27,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 333.0) internal successors, (3996), 12 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states 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 06:45:27,493 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 333.0) internal successors, (3996), 12 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states 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 06:45:27,493 INFO L175 Difference]: Start difference. First operand has 116 places, 70 transitions, 552 flow. Second operand 11 states and 1502 transitions. [2023-08-30 06:45:27,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 168 transitions, 1388 flow [2023-08-30 06:45:27,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 168 transitions, 1299 flow, removed 31 selfloop flow, removed 9 redundant places. [2023-08-30 06:45:27,648 INFO L231 Difference]: Finished difference. Result has 119 places, 74 transitions, 545 flow [2023-08-30 06:45:27,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=545, PETRI_PLACES=119, PETRI_TRANSITIONS=74} [2023-08-30 06:45:27,649 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 62 predicate places. [2023-08-30 06:45:27,649 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 74 transitions, 545 flow [2023-08-30 06:45:27,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 129.0) internal successors, (1290), 10 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states 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 06:45:27,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:27,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:45:27,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 06:45:27,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:45:27,855 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:45:27,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:45:27,856 INFO L85 PathProgramCache]: Analyzing trace with hash -724197799, now seen corresponding path program 1 times [2023-08-30 06:45:27,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:45:27,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2026149929] [2023-08-30 06:45:27,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:45:27,856 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 06:45:27,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:45:27,857 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:45:27,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 06:45:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:45:27,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 06:45:27,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:45:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:45:28,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:45:28,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:45:28,306 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:45:28,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2026149929] [2023-08-30 06:45:28,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2026149929] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:45:28,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:45:28,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:45:28,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557717537] [2023-08-30 06:45:28,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:45:28,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:45:28,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:45:28,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:45:28,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:45:28,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 333 [2023-08-30 06:45:28,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 74 transitions, 545 flow. Second operand has 12 states, 12 states have (on average 135.83333333333334) internal successors, (1630), 12 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states 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 06:45:28,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:28,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 333 [2023-08-30 06:45:28,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:33,232 INFO L130 PetriNetUnfolder]: 21755/30859 cut-off events. [2023-08-30 06:45:33,232 INFO L131 PetriNetUnfolder]: For 124036/129593 co-relation queries the response was YES. [2023-08-30 06:45:33,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123942 conditions, 30859 events. 21755/30859 cut-off events. For 124036/129593 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 191740 event pairs, 11742 based on Foata normal form. 5645/34864 useless extension candidates. Maximal degree in co-relation 123896. Up to 22588 conditions per place. [2023-08-30 06:45:33,536 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 143 selfloop transitions, 12 changer transitions 0/160 dead transitions. [2023-08-30 06:45:33,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 160 transitions, 1341 flow [2023-08-30 06:45:33,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 06:45:33,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 06:45:33,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1422 transitions. [2023-08-30 06:45:33,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42702702702702705 [2023-08-30 06:45:33,539 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1422 transitions. [2023-08-30 06:45:33,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1422 transitions. [2023-08-30 06:45:33,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:33,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1422 transitions. [2023-08-30 06:45:33,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 142.2) internal successors, (1422), 10 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states 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 06:45:33,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 333.0) internal successors, (3663), 11 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states 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 06:45:33,544 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 333.0) internal successors, (3663), 11 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states 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 06:45:33,544 INFO L175 Difference]: Start difference. First operand has 119 places, 74 transitions, 545 flow. Second operand 10 states and 1422 transitions. [2023-08-30 06:45:33,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 160 transitions, 1341 flow [2023-08-30 06:45:33,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 160 transitions, 1320 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-30 06:45:33,847 INFO L231 Difference]: Finished difference. Result has 125 places, 75 transitions, 564 flow [2023-08-30 06:45:33,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=564, PETRI_PLACES=125, PETRI_TRANSITIONS=75} [2023-08-30 06:45:33,847 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 68 predicate places. [2023-08-30 06:45:33,847 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 75 transitions, 564 flow [2023-08-30 06:45:33,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 135.83333333333334) internal successors, (1630), 12 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states 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 06:45:33,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:33,848 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:45:33,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 06:45:34,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:45:34,049 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:45:34,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:45:34,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1525925856, now seen corresponding path program 2 times [2023-08-30 06:45:34,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:45:34,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289100950] [2023-08-30 06:45:34,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:45:34,049 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 06:45:34,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:45:34,050 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:45:34,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 06:45:34,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:45:34,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:45:34,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 06:45:34,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:45:34,281 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:45:34,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:45:34,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:45:34,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:45:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:45:35,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:45:35,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289100950] [2023-08-30 06:45:35,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289100950] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:45:35,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:45:35,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 06:45:35,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098822708] [2023-08-30 06:45:35,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:45:35,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 06:45:35,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:45:35,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 06:45:35,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-30 06:45:44,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 333 [2023-08-30 06:45:44,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 75 transitions, 564 flow. Second operand has 18 states, 18 states have (on average 127.33333333333333) internal successors, (2292), 18 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states 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 06:45:44,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:44,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 333 [2023-08-30 06:45:44,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:59,072 INFO L130 PetriNetUnfolder]: 25273/34870 cut-off events. [2023-08-30 06:45:59,072 INFO L131 PetriNetUnfolder]: For 151489/155189 co-relation queries the response was YES. [2023-08-30 06:45:59,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154012 conditions, 34870 events. 25273/34870 cut-off events. For 151489/155189 co-relation queries the response was YES. Maximal size of possible extension queue 1584. Compared 220563 event pairs, 8306 based on Foata normal form. 3902/35259 useless extension candidates. Maximal degree in co-relation 153964. Up to 15532 conditions per place. [2023-08-30 06:45:59,434 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 319 selfloop transitions, 24 changer transitions 0/349 dead transitions. [2023-08-30 06:45:59,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 349 transitions, 2927 flow [2023-08-30 06:45:59,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 06:45:59,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 06:45:59,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2614 transitions. [2023-08-30 06:45:59,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41314999209736053 [2023-08-30 06:45:59,439 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2614 transitions. [2023-08-30 06:45:59,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2614 transitions. [2023-08-30 06:45:59,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:59,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2614 transitions. [2023-08-30 06:45:59,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 137.57894736842104) internal successors, (2614), 19 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states 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 06:45:59,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states 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 06:45:59,448 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states 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 06:45:59,448 INFO L175 Difference]: Start difference. First operand has 125 places, 75 transitions, 564 flow. Second operand 19 states and 2614 transitions. [2023-08-30 06:45:59,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 349 transitions, 2927 flow [2023-08-30 06:45:59,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 349 transitions, 2908 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 06:45:59,831 INFO L231 Difference]: Finished difference. Result has 144 places, 87 transitions, 704 flow [2023-08-30 06:45:59,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=704, PETRI_PLACES=144, PETRI_TRANSITIONS=87} [2023-08-30 06:45:59,832 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 87 predicate places. [2023-08-30 06:45:59,833 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 87 transitions, 704 flow [2023-08-30 06:45:59,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 127.33333333333333) internal successors, (2292), 18 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states 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 06:45:59,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:59,834 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2023-08-30 06:45:59,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 06:46:00,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:46:00,044 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:46:00,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:46:00,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1637399693, now seen corresponding path program 3 times [2023-08-30 06:46:00,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:46:00,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309009929] [2023-08-30 06:46:00,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:46:00,045 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 06:46:00,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:46:00,046 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:46:00,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 06:46:00,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 06:46:00,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:46:00,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 06:46:00,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:46:00,334 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:46:00,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:46:00,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2023-08-30 06:46:00,686 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 7 treesize of output 5 [2023-08-30 06:46:00,694 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:46:00,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:46:00,799 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 8 treesize of output 6 [2023-08-30 06:46:00,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2023-08-30 06:46:00,833 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 06:46:02,426 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:46:02,426 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:46:02,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309009929] [2023-08-30 06:46:02,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309009929] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:46:02,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:46:02,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2023-08-30 06:46:02,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758429361] [2023-08-30 06:46:02,427 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:46:02,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 06:46:02,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:46:02,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 06:46:02,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-08-30 06:46:13,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 06:46:13,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 87 transitions, 704 flow. Second operand has 21 states, 21 states have (on average 133.14285714285714) internal successors, (2796), 21 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states 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 06:46:13,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:46:13,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 06:46:13,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:46:28,266 INFO L130 PetriNetUnfolder]: 32291/45201 cut-off events. [2023-08-30 06:46:28,266 INFO L131 PetriNetUnfolder]: For 198170/202412 co-relation queries the response was YES. [2023-08-30 06:46:28,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213190 conditions, 45201 events. 32291/45201 cut-off events. For 198170/202412 co-relation queries the response was YES. Maximal size of possible extension queue 2003. Compared 304902 event pairs, 10467 based on Foata normal form. 4636/45856 useless extension candidates. Maximal degree in co-relation 213136. Up to 19699 conditions per place. [2023-08-30 06:46:28,870 INFO L137 encePairwiseOnDemand]: 324/333 looper letters, 461 selfloop transitions, 42 changer transitions 0/509 dead transitions. [2023-08-30 06:46:28,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 509 transitions, 4560 flow [2023-08-30 06:46:28,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 06:46:28,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 06:46:28,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3456 transitions. [2023-08-30 06:46:28,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2023-08-30 06:46:28,875 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3456 transitions. [2023-08-30 06:46:28,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3456 transitions. [2023-08-30 06:46:28,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:46:28,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3456 transitions. [2023-08-30 06:46:28,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 144.0) internal successors, (3456), 24 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states 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 06:46:28,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 333.0) internal successors, (8325), 25 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states 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 06:46:28,884 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 333.0) internal successors, (8325), 25 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states 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 06:46:28,885 INFO L175 Difference]: Start difference. First operand has 144 places, 87 transitions, 704 flow. Second operand 24 states and 3456 transitions. [2023-08-30 06:46:28,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 509 transitions, 4560 flow [2023-08-30 06:46:29,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 509 transitions, 4266 flow, removed 140 selfloop flow, removed 5 redundant places. [2023-08-30 06:46:29,909 INFO L231 Difference]: Finished difference. Result has 172 places, 111 transitions, 1053 flow [2023-08-30 06:46:29,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1053, PETRI_PLACES=172, PETRI_TRANSITIONS=111} [2023-08-30 06:46:29,910 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 115 predicate places. [2023-08-30 06:46:29,910 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 111 transitions, 1053 flow [2023-08-30 06:46:29,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 133.14285714285714) internal successors, (2796), 21 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states 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 06:46:29,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:46:29,911 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:46:29,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 06:46:30,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:46:30,111 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:46:30,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:46:30,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1421077346, now seen corresponding path program 2 times [2023-08-30 06:46:30,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:46:30,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385362065] [2023-08-30 06:46:30,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:46:30,112 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 06:46:30,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:46:30,113 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:46:30,115 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 (23)] Waiting until timeout for monitored process [2023-08-30 06:46:30,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:46:30,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:46:30,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 06:46:30,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:46:30,466 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:46:30,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:46:30,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:46:30,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:46:32,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:46:32,376 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:46:32,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [385362065] [2023-08-30 06:46:32,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [385362065] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:46:32,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:46:32,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 06:46:32,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772082321] [2023-08-30 06:46:32,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:46:32,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 06:46:32,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:46:32,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 06:46:32,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-08-30 06:46:44,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 333 [2023-08-30 06:46:44,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 111 transitions, 1053 flow. Second operand has 14 states, 14 states have (on average 127.71428571428571) internal successors, (1788), 14 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:44,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:46:44,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 333 [2023-08-30 06:46:44,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:47:00,770 INFO L130 PetriNetUnfolder]: 37249/52863 cut-off events. [2023-08-30 06:47:00,770 INFO L131 PetriNetUnfolder]: For 345139/353851 co-relation queries the response was YES. [2023-08-30 06:47:01,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259242 conditions, 52863 events. 37249/52863 cut-off events. For 345139/353851 co-relation queries the response was YES. Maximal size of possible extension queue 1943. Compared 357398 event pairs, 14073 based on Foata normal form. 10336/63184 useless extension candidates. Maximal degree in co-relation 259177. Up to 14724 conditions per place. [2023-08-30 06:47:01,487 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 414 selfloop transitions, 27 changer transitions 0/449 dead transitions. [2023-08-30 06:47:01,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 449 transitions, 4650 flow [2023-08-30 06:47:01,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 06:47:01,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 06:47:01,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2582 transitions. [2023-08-30 06:47:01,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40809230282914494 [2023-08-30 06:47:01,492 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2582 transitions. [2023-08-30 06:47:01,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2582 transitions. [2023-08-30 06:47:01,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:47:01,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2582 transitions. [2023-08-30 06:47:01,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 135.89473684210526) internal successors, (2582), 19 states have internal predecessors, (2582), 0 states have call successors, (0), 0 states 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 06:47:01,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states 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 06:47:01,498 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states 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 06:47:01,498 INFO L175 Difference]: Start difference. First operand has 172 places, 111 transitions, 1053 flow. Second operand 19 states and 2582 transitions. [2023-08-30 06:47:01,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 449 transitions, 4650 flow [2023-08-30 06:47:02,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 449 transitions, 4524 flow, removed 53 selfloop flow, removed 7 redundant places. [2023-08-30 06:47:02,639 INFO L231 Difference]: Finished difference. Result has 188 places, 121 transitions, 1180 flow [2023-08-30 06:47:02,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1180, PETRI_PLACES=188, PETRI_TRANSITIONS=121} [2023-08-30 06:47:02,639 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 131 predicate places. [2023-08-30 06:47:02,640 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 121 transitions, 1180 flow [2023-08-30 06:47:02,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 127.71428571428571) internal successors, (1788), 14 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:02,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:47:02,640 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 06:47:02,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 06:47:02,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:02,850 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:47:02,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:47:02,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1076024012, now seen corresponding path program 3 times [2023-08-30 06:47:02,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:47:02,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722613262] [2023-08-30 06:47:02,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:47:02,850 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 06:47:02,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:47:02,852 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:47:02,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 06:47:03,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 06:47:03,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:47:03,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:47:03,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:47:03,137 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:47:03,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:47:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:47:03,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:47:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:47:05,550 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:47:05,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722613262] [2023-08-30 06:47:05,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722613262] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:47:05,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:47:05,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 06:47:05,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293638783] [2023-08-30 06:47:05,551 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:47:05,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 06:47:05,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:47:05,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 06:47:05,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 06:47:18,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 333 [2023-08-30 06:47:18,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 121 transitions, 1180 flow. Second operand has 24 states, 24 states have (on average 138.0) internal successors, (3312), 24 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states 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 06:47:18,600 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:47:18,600 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 333 [2023-08-30 06:47:18,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:47:50,586 INFO L130 PetriNetUnfolder]: 70299/97281 cut-off events. [2023-08-30 06:47:50,586 INFO L131 PetriNetUnfolder]: For 845890/865098 co-relation queries the response was YES. [2023-08-30 06:47:51,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535547 conditions, 97281 events. 70299/97281 cut-off events. For 845890/865098 co-relation queries the response was YES. Maximal size of possible extension queue 2724. Compared 653391 event pairs, 47425 based on Foata normal form. 19169/116142 useless extension candidates. Maximal degree in co-relation 535477. Up to 28629 conditions per place. [2023-08-30 06:47:52,277 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 733 selfloop transitions, 24 changer transitions 0/770 dead transitions. [2023-08-30 06:47:52,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 770 transitions, 7471 flow [2023-08-30 06:47:52,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 06:47:52,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 06:47:52,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3782 transitions. [2023-08-30 06:47:52,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47322322322322324 [2023-08-30 06:47:52,282 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3782 transitions. [2023-08-30 06:47:52,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3782 transitions. [2023-08-30 06:47:52,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:47:52,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3782 transitions. [2023-08-30 06:47:52,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 157.58333333333334) internal successors, (3782), 24 states have internal predecessors, (3782), 0 states have call successors, (0), 0 states 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 06:47:52,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 333.0) internal successors, (8325), 25 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states 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 06:47:52,289 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 333.0) internal successors, (8325), 25 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states 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 06:47:52,289 INFO L175 Difference]: Start difference. First operand has 188 places, 121 transitions, 1180 flow. Second operand 24 states and 3782 transitions. [2023-08-30 06:47:52,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 770 transitions, 7471 flow [2023-08-30 06:48:00,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 770 transitions, 7411 flow, removed 18 selfloop flow, removed 9 redundant places. [2023-08-30 06:48:00,431 INFO L231 Difference]: Finished difference. Result has 215 places, 134 transitions, 1331 flow [2023-08-30 06:48:00,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1331, PETRI_PLACES=215, PETRI_TRANSITIONS=134} [2023-08-30 06:48:00,432 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 158 predicate places. [2023-08-30 06:48:00,432 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 134 transitions, 1331 flow [2023-08-30 06:48:00,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 138.0) internal successors, (3312), 24 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states 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 06:48:00,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:48:00,433 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:48:00,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 06:48:00,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:48:00,634 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:48:00,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:48:00,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1083547680, now seen corresponding path program 2 times [2023-08-30 06:48:00,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:48:00,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830637721] [2023-08-30 06:48:00,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:48:00,635 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 06:48:00,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:48:00,635 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:48:00,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 06:48:00,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 06:48:00,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:48:00,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:48:00,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:48:00,829 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:48:00,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:48:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 06:48:01,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:48:01,012 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:48:01,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830637721] [2023-08-30 06:48:01,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830637721] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:48:01,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:48:01,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:48:01,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822740719] [2023-08-30 06:48:01,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:48:01,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:48:01,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:48:01,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:48:01,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:48:01,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 06:48:01,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 134 transitions, 1331 flow. Second operand has 5 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 0 states have call successors, (0), 0 states 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 06:48:01,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:48:01,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 06:48:01,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:48:18,155 INFO L130 PetriNetUnfolder]: 73161/102966 cut-off events. [2023-08-30 06:48:18,155 INFO L131 PetriNetUnfolder]: For 843745/861767 co-relation queries the response was YES. [2023-08-30 06:48:19,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543555 conditions, 102966 events. 73161/102966 cut-off events. For 843745/861767 co-relation queries the response was YES. Maximal size of possible extension queue 2214. Compared 690196 event pairs, 44685 based on Foata normal form. 26802/129666 useless extension candidates. Maximal degree in co-relation 543472. Up to 85727 conditions per place. [2023-08-30 06:48:20,185 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 169 selfloop transitions, 21 changer transitions 0/198 dead transitions. [2023-08-30 06:48:20,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 198 transitions, 2300 flow [2023-08-30 06:48:20,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:48:20,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:48:20,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 700 transitions. [2023-08-30 06:48:20,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42042042042042044 [2023-08-30 06:48:20,187 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 700 transitions. [2023-08-30 06:48:20,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 700 transitions. [2023-08-30 06:48:20,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:48:20,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 700 transitions. [2023-08-30 06:48:20,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.0) internal successors, (700), 5 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 06:48:20,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states 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 06:48:20,189 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states 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 06:48:20,189 INFO L175 Difference]: Start difference. First operand has 215 places, 134 transitions, 1331 flow. Second operand 5 states and 700 transitions. [2023-08-30 06:48:20,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 198 transitions, 2300 flow [2023-08-30 06:48:30,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 198 transitions, 2244 flow, removed 17 selfloop flow, removed 10 redundant places. [2023-08-30 06:48:30,599 INFO L231 Difference]: Finished difference. Result has 209 places, 134 transitions, 1339 flow [2023-08-30 06:48:30,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1265, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1339, PETRI_PLACES=209, PETRI_TRANSITIONS=134} [2023-08-30 06:48:30,600 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 152 predicate places. [2023-08-30 06:48:30,600 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 134 transitions, 1339 flow [2023-08-30 06:48:30,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 0 states have call successors, (0), 0 states 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 06:48:30,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:48:30,600 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2023-08-30 06:48:30,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-30 06:48:30,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:48:30,801 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:48:30,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:48:30,801 INFO L85 PathProgramCache]: Analyzing trace with hash 259241826, now seen corresponding path program 4 times [2023-08-30 06:48:30,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:48:30,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739761468] [2023-08-30 06:48:30,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 06:48:30,802 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 06:48:30,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:48:30,803 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:48:30,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 06:48:30,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 06:48:30,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:48:30,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 06:48:30,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:48:31,012 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:48:31,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:48:31,372 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:48:31,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:48:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:48:33,094 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:48:33,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739761468] [2023-08-30 06:48:33,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739761468] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:48:33,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:48:33,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 06:48:33,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091073980] [2023-08-30 06:48:33,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:48:33,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 06:48:33,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:48:33,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 06:48:33,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-08-30 06:48:46,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 333 [2023-08-30 06:48:46,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 134 transitions, 1339 flow. Second operand has 24 states, 24 states have (on average 131.08333333333334) internal successors, (3146), 24 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states 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 06:48:46,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:48:46,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 333 [2023-08-30 06:48:46,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:49:32,472 INFO L130 PetriNetUnfolder]: 97421/134773 cut-off events. [2023-08-30 06:49:32,472 INFO L131 PetriNetUnfolder]: For 1529908/1562653 co-relation queries the response was YES. [2023-08-30 06:49:34,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 778132 conditions, 134773 events. 97421/134773 cut-off events. For 1529908/1562653 co-relation queries the response was YES. Maximal size of possible extension queue 2569. Compared 919608 event pairs, 10919 based on Foata normal form. 49489/184071 useless extension candidates. Maximal degree in co-relation 778047. Up to 29214 conditions per place. [2023-08-30 06:49:35,276 INFO L137 encePairwiseOnDemand]: 326/333 looper letters, 711 selfloop transitions, 56 changer transitions 0/775 dead transitions. [2023-08-30 06:49:35,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 775 transitions, 7764 flow [2023-08-30 06:49:35,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 06:49:35,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 06:49:35,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5241 transitions. [2023-08-30 06:49:35,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42537131726320915 [2023-08-30 06:49:35,284 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5241 transitions. [2023-08-30 06:49:35,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5241 transitions. [2023-08-30 06:49:35,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:49:35,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5241 transitions. [2023-08-30 06:49:35,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 141.64864864864865) internal successors, (5241), 37 states have internal predecessors, (5241), 0 states have call successors, (0), 0 states 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 06:49:35,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 333.0) internal successors, (12654), 38 states have internal predecessors, (12654), 0 states have call successors, (0), 0 states 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 06:49:35,298 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 333.0) internal successors, (12654), 38 states have internal predecessors, (12654), 0 states have call successors, (0), 0 states 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 06:49:35,299 INFO L175 Difference]: Start difference. First operand has 209 places, 134 transitions, 1339 flow. Second operand 37 states and 5241 transitions. [2023-08-30 06:49:35,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 775 transitions, 7764 flow [2023-08-30 06:49:44,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 775 transitions, 7544 flow, removed 59 selfloop flow, removed 5 redundant places. [2023-08-30 06:49:44,427 INFO L231 Difference]: Finished difference. Result has 246 places, 147 transitions, 1572 flow [2023-08-30 06:49:44,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1244, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1572, PETRI_PLACES=246, PETRI_TRANSITIONS=147} [2023-08-30 06:49:44,428 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 189 predicate places. [2023-08-30 06:49:44,428 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 147 transitions, 1572 flow [2023-08-30 06:49:44,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 131.08333333333334) internal successors, (3146), 24 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states 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 06:49:44,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:49:44,429 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 3, 1, 1, 1, 1, 1] [2023-08-30 06:49:44,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-30 06:49:44,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:49:44,629 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:49:44,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:49:44,630 INFO L85 PathProgramCache]: Analyzing trace with hash -755102101, now seen corresponding path program 5 times [2023-08-30 06:49:44,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:49:44,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051888004] [2023-08-30 06:49:44,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 06:49:44,630 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 06:49:44,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:49:44,631 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:49:44,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 06:49:44,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 06:49:44,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:49:44,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 06:49:44,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:49:44,878 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:49:44,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:49:45,245 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 7 treesize of output 5 [2023-08-30 06:49:45,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2023-08-30 06:49:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 06:49:45,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:49:45,561 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 8 treesize of output 6 [2023-08-30 06:49:45,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2023-08-30 06:49:45,589 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 06:49:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:49:47,444 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:49:47,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051888004] [2023-08-30 06:49:47,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051888004] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:49:47,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:49:47,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 22 [2023-08-30 06:49:47,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051191949] [2023-08-30 06:49:47,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:49:47,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 06:49:47,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:49:47,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 06:49:47,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-08-30 06:50:06,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 333 [2023-08-30 06:50:06,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 147 transitions, 1572 flow. Second operand has 23 states, 23 states have (on average 132.17391304347825) internal successors, (3040), 23 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states 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 06:50:06,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:50:06,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 333 [2023-08-30 06:50:06,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:50:39,857 INFO L130 PetriNetUnfolder]: 93937/130008 cut-off events. [2023-08-30 06:50:39,858 INFO L131 PetriNetUnfolder]: For 1370752/1400784 co-relation queries the response was YES. [2023-08-30 06:50:42,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770431 conditions, 130008 events. 93937/130008 cut-off events. For 1370752/1400784 co-relation queries the response was YES. Maximal size of possible extension queue 2521. Compared 855425 event pairs, 59453 based on Foata normal form. 30163/159686 useless extension candidates. Maximal degree in co-relation 770342. Up to 113916 conditions per place. [2023-08-30 06:50:43,142 INFO L137 encePairwiseOnDemand]: 324/333 looper letters, 400 selfloop transitions, 41 changer transitions 0/449 dead transitions. [2023-08-30 06:50:43,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 449 transitions, 4505 flow [2023-08-30 06:50:43,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 06:50:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 06:50:43,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3254 transitions. [2023-08-30 06:50:43,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4248596422509466 [2023-08-30 06:50:43,149 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3254 transitions. [2023-08-30 06:50:43,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3254 transitions. [2023-08-30 06:50:43,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:50:43,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3254 transitions. [2023-08-30 06:50:43,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 141.47826086956522) internal successors, (3254), 23 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states 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 06:50:43,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 333.0) internal successors, (7992), 24 states have internal predecessors, (7992), 0 states have call successors, (0), 0 states 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 06:50:43,164 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 333.0) internal successors, (7992), 24 states have internal predecessors, (7992), 0 states have call successors, (0), 0 states 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 06:50:43,164 INFO L175 Difference]: Start difference. First operand has 246 places, 147 transitions, 1572 flow. Second operand 23 states and 3254 transitions. [2023-08-30 06:50:43,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 449 transitions, 4505 flow [2023-08-30 06:51:56,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 449 transitions, 4242 flow, removed 58 selfloop flow, removed 29 redundant places. [2023-08-30 06:51:56,209 INFO L231 Difference]: Finished difference. Result has 238 places, 151 transitions, 1458 flow [2023-08-30 06:51:56,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1458, PETRI_PLACES=238, PETRI_TRANSITIONS=151} [2023-08-30 06:51:56,210 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 181 predicate places. [2023-08-30 06:51:56,210 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 151 transitions, 1458 flow [2023-08-30 06:51:56,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 132.17391304347825) internal successors, (3040), 23 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states 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 06:51:56,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:51:56,211 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:51:56,219 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 (27)] Forceful destruction successful, exit code 0 [2023-08-30 06:51:56,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:51:56,411 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:51:56,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:51:56,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1128839689, now seen corresponding path program 3 times [2023-08-30 06:51:56,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:51:56,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [861963102] [2023-08-30 06:51:56,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:51:56,412 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 06:51:56,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:51:56,413 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:51:56,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-30 06:51:56,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 06:51:56,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:51:56,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 06:51:56,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:51:56,659 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:51:56,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:51:57,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 06:51:57,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:51:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 06:51:58,690 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:51:58,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [861963102] [2023-08-30 06:51:58,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [861963102] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:51:58,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:51:58,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:51:58,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548118196] [2023-08-30 06:51:58,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:51:58,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:51:58,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:51:58,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:51:58,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:52:04,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 333 [2023-08-30 06:52:04,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 151 transitions, 1458 flow. Second operand has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states 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 06:52:04,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:52:04,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 333 [2023-08-30 06:52:04,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:52:34,543 INFO L130 PetriNetUnfolder]: 121605/168153 cut-off events. [2023-08-30 06:52:34,544 INFO L131 PetriNetUnfolder]: For 1342317/1362805 co-relation queries the response was YES. [2023-08-30 06:52:37,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 862066 conditions, 168153 events. 121605/168153 cut-off events. For 1342317/1362805 co-relation queries the response was YES. Maximal size of possible extension queue 2913. Compared 1150519 event pairs, 18217 based on Foata normal form. 32254/200302 useless extension candidates. Maximal degree in co-relation 861983. Up to 56108 conditions per place. [2023-08-30 06:52:38,504 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 353 selfloop transitions, 26 changer transitions 0/387 dead transitions. [2023-08-30 06:52:38,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 387 transitions, 4347 flow [2023-08-30 06:52:38,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 06:52:38,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 06:52:38,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 982 transitions. [2023-08-30 06:52:38,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212784212784213 [2023-08-30 06:52:38,508 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 982 transitions. [2023-08-30 06:52:38,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 982 transitions. [2023-08-30 06:52:38,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:52:38,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 982 transitions. [2023-08-30 06:52:38,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 140.28571428571428) internal successors, (982), 7 states have internal predecessors, (982), 0 states have call successors, (0), 0 states 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 06:52:38,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 333.0) internal successors, (2664), 8 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states 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 06:52:38,512 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 333.0) internal successors, (2664), 8 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states 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 06:52:38,512 INFO L175 Difference]: Start difference. First operand has 238 places, 151 transitions, 1458 flow. Second operand 7 states and 982 transitions. [2023-08-30 06:52:38,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 387 transitions, 4347 flow [2023-08-30 06:53:27,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 387 transitions, 4161 flow, removed 28 selfloop flow, removed 16 redundant places. [2023-08-30 06:53:27,896 INFO L231 Difference]: Finished difference. Result has 228 places, 152 transitions, 1463 flow [2023-08-30 06:53:27,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1463, PETRI_PLACES=228, PETRI_TRANSITIONS=152} [2023-08-30 06:53:27,897 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 171 predicate places. [2023-08-30 06:53:27,897 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 152 transitions, 1463 flow [2023-08-30 06:53:27,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states 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 06:53:27,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:53:27,898 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:53:27,907 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 (28)] Forceful destruction successful, exit code 0 [2023-08-30 06:53:28,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:28,107 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:53:28,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:53:28,108 INFO L85 PathProgramCache]: Analyzing trace with hash -33945372, now seen corresponding path program 3 times [2023-08-30 06:53:28,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:53:28,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [993013067] [2023-08-30 06:53:28,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:53:28,108 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 06:53:28,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:53:28,109 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:53:28,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-08-30 06:53:28,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 06:53:28,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:53:28,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:53:28,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:53:28,383 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:53:28,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:53:28,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 06:53:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 06:53:28,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:53:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 06:53:28,900 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:53:28,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [993013067] [2023-08-30 06:53:28,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [993013067] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:53:28,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:53:28,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-30 06:53:28,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163413642] [2023-08-30 06:53:28,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:53:28,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 06:53:28,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:53:28,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 06:53:28,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-08-30 06:53:32,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 333 [2023-08-30 06:53:32,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 152 transitions, 1463 flow. Second operand has 14 states, 14 states have (on average 129.57142857142858) internal successors, (1814), 14 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:32,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:53:32,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 333 [2023-08-30 06:53:32,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:54:01,510 INFO L130 PetriNetUnfolder]: 111383/154139 cut-off events. [2023-08-30 06:54:01,510 INFO L131 PetriNetUnfolder]: For 1890015/1912122 co-relation queries the response was YES. [2023-08-30 06:54:04,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 826428 conditions, 154139 events. 111383/154139 cut-off events. For 1890015/1912122 co-relation queries the response was YES. Maximal size of possible extension queue 2677. Compared 1039964 event pairs, 50024 based on Foata normal form. 22160/176090 useless extension candidates. Maximal degree in co-relation 826344. Up to 92476 conditions per place. [2023-08-30 06:54:05,530 INFO L137 encePairwiseOnDemand]: 326/333 looper letters, 272 selfloop transitions, 22 changer transitions 0/304 dead transitions. [2023-08-30 06:54:05,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 304 transitions, 3114 flow [2023-08-30 06:54:05,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 06:54:05,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 06:54:05,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1920 transitions. [2023-08-30 06:54:05,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4118404118404118 [2023-08-30 06:54:05,535 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1920 transitions. [2023-08-30 06:54:05,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1920 transitions. [2023-08-30 06:54:05,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:54:05,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1920 transitions. [2023-08-30 06:54:05,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 137.14285714285714) internal successors, (1920), 14 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states 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 06:54:05,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 333.0) internal successors, (4995), 15 states have internal predecessors, (4995), 0 states have call successors, (0), 0 states 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 06:54:05,561 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 333.0) internal successors, (4995), 15 states have internal predecessors, (4995), 0 states have call successors, (0), 0 states 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 06:54:05,562 INFO L175 Difference]: Start difference. First operand has 228 places, 152 transitions, 1463 flow. Second operand 14 states and 1920 transitions. [2023-08-30 06:54:05,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 304 transitions, 3114 flow [2023-08-30 06:55:13,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 304 transitions, 3032 flow, removed 16 selfloop flow, removed 4 redundant places. [2023-08-30 06:55:13,055 INFO L231 Difference]: Finished difference. Result has 241 places, 151 transitions, 1470 flow [2023-08-30 06:55:13,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1470, PETRI_PLACES=241, PETRI_TRANSITIONS=151} [2023-08-30 06:55:13,056 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 184 predicate places. [2023-08-30 06:55:13,056 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 151 transitions, 1470 flow [2023-08-30 06:55:13,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 129.57142857142858) internal successors, (1814), 14 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:55:13,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:55:13,057 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:55:13,065 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 (29)] Forceful destruction successful, exit code 0 [2023-08-30 06:55:13,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:55:13,260 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:55:13,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:55:13,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1356686679, now seen corresponding path program 4 times [2023-08-30 06:55:13,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:55:13,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962332828] [2023-08-30 06:55:13,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 06:55:13,261 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 06:55:13,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:55:13,262 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:55:13,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-08-30 06:55:13,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 06:55:13,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:55:13,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 06:55:13,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:55:13,519 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:55:13,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:55:14,208 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:55:14,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:55:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:55:16,093 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:55:16,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962332828] [2023-08-30 06:55:16,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962332828] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:55:16,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:55:16,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 06:55:16,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739733527] [2023-08-30 06:55:16,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:55:16,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 06:55:16,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:55:16,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 06:55:16,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-08-30 06:55:35,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 333 [2023-08-30 06:55:35,062 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 151 transitions, 1470 flow. Second operand has 24 states, 24 states have (on average 130.25) internal successors, (3126), 24 states have internal predecessors, (3126), 0 states have call successors, (0), 0 states 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 06:55:35,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:55:35,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 333 [2023-08-30 06:55:35,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15