./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:40:45,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:40:45,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:40:45,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:40:45,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:40:45,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:40:45,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:40:45,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:40:45,746 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:40:45,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:40:45,751 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:40:45,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:40:45,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:40:45,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:40:45,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:40:45,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:40:45,763 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:40:45,764 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:40:45,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:40:45,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:40:45,771 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:40:45,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:40:45,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:40:45,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:40:45,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:40:45,780 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:40:45,780 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:40:45,782 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:40:45,782 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:40:45,783 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:40:45,783 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:40:45,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:40:45,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:40:45,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:40:45,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:40:45,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:40:45,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:40:45,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:40:45,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:40:45,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:40:45,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:40:45,791 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 22:40:45,822 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:40:45,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:40:45,823 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:40:45,823 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:40:45,824 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:40:45,824 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:40:45,825 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:40:45,825 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:40:45,825 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:40:45,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:40:45,826 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:40:45,826 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:40:45,826 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:40:45,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:40:45,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:40:45,827 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:40:45,827 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:40:45,827 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:40:45,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:40:45,828 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:40:45,828 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:40:45,828 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:40:45,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:40:45,828 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:40:45,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:40:45,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:40:45,829 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:40:45,829 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:40:45,829 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 22:40:45,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 22:40:45,829 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:40:45,830 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:40:45,830 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:40:45,830 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:40:45,830 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:40:46,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:40:46,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:40:46,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:40:46,193 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:40:46,194 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:40:46,195 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2023-08-29 22:40:47,340 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:40:47,540 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:40:47,540 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2023-08-29 22:40:47,546 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91ef1ea40/11d0e4adb7354d46a3690604201988bb/FLAG8499308bd [2023-08-29 22:40:47,557 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91ef1ea40/11d0e4adb7354d46a3690604201988bb [2023-08-29 22:40:47,560 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:40:47,561 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:40:47,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:40:47,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:40:47,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:40:47,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:40:47" (1/1) ... [2023-08-29 22:40:47,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@358c1340 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:40:47, skipping insertion in model container [2023-08-29 22:40:47,566 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:40:47" (1/1) ... [2023-08-29 22:40:47,571 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:40:47,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:40:47,718 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c[3034,3047] [2023-08-29 22:40:47,738 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:40:47,748 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-29 22:40:47,748 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@66eb54c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:40:47, skipping insertion in model container [2023-08-29 22:40:47,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:40:47,749 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 22:40:47,750 INFO L158 Benchmark]: Toolchain (without parser) took 188.77ms. Allocated memory is still 65.0MB. Free memory was 42.3MB in the beginning and 32.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 22:40:47,751 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 65.0MB. Free memory was 42.5MB in the beginning and 42.4MB in the end (delta: 49.1kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 22:40:47,751 INFO L158 Benchmark]: CACSL2BoogieTranslator took 186.93ms. Allocated memory is still 65.0MB. Free memory was 42.1MB in the beginning and 32.3MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 22:40:47,753 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 65.0MB. Free memory was 42.5MB in the beginning and 42.4MB in the end (delta: 49.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 186.93ms. Allocated memory is still 65.0MB. Free memory was 42.1MB in the beginning and 32.3MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 118]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:40:49,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:40:49,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:40:49,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:40:49,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:40:49,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:40:49,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:40:49,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:40:49,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:40:49,484 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:40:49,485 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:40:49,486 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:40:49,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:40:49,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:40:49,487 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:40:49,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:40:49,489 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:40:49,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:40:49,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:40:49,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:40:49,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:40:49,502 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:40:49,503 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:40:49,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:40:49,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:40:49,515 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:40:49,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:40:49,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:40:49,517 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:40:49,518 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:40:49,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:40:49,519 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:40:49,520 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:40:49,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:40:49,522 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:40:49,523 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:40:49,524 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:40:49,524 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:40:49,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:40:49,525 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:40:49,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:40:49,527 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 22:40:49,557 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:40:49,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:40:49,559 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:40:49,559 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:40:49,560 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:40:49,560 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:40:49,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:40:49,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:40:49,562 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:40:49,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:40:49,562 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:40:49,563 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:40:49,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:40:49,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:40:49,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:40:49,563 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:40:49,564 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:40:49,564 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:40:49,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:40:49,564 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:40:49,564 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 22:40:49,565 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 22:40:49,565 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:40:49,565 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:40:49,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:40:49,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:40:49,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:40:49,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:40:49,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:40:49,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:40:49,566 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 22:40:49,567 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 22:40:49,567 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:40:49,567 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:40:49,567 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:40:49,568 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 22:40:49,568 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:40:49,568 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:40:49,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:40:49,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:40:49,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:40:49,887 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:40:49,888 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:40:49,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2023-08-29 22:40:51,093 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:40:51,344 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:40:51,344 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2023-08-29 22:40:51,352 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7a6443cc/4072c5b1fbe84a359a41173b8a1e32d6/FLAG7ab3d59c7 [2023-08-29 22:40:51,364 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7a6443cc/4072c5b1fbe84a359a41173b8a1e32d6 [2023-08-29 22:40:51,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:40:51,367 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:40:51,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:40:51,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:40:51,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:40:51,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:40:51" (1/1) ... [2023-08-29 22:40:51,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60a7246e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:40:51, skipping insertion in model container [2023-08-29 22:40:51,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:40:51" (1/1) ... [2023-08-29 22:40:51,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:40:51,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:40:51,577 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c[3034,3047] [2023-08-29 22:40:51,587 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:40:51,599 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 22:40:51,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:40:51,622 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c[3034,3047] [2023-08-29 22:40:51,635 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:40:51,644 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 22:40:51,665 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c[3034,3047] [2023-08-29 22:40:51,669 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:40:51,683 INFO L208 MainTranslator]: Completed translation [2023-08-29 22:40:51,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:40:51 WrapperNode [2023-08-29 22:40:51,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:40:51,685 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 22:40:51,685 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 22:40:51,685 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 22:40:51,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:40:51" (1/1) ... [2023-08-29 22:40:51,700 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:40:51" (1/1) ... [2023-08-29 22:40:51,726 INFO L138 Inliner]: procedures = 28, calls = 46, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 271 [2023-08-29 22:40:51,726 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 22:40:51,727 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 22:40:51,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 22:40:51,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 22:40:51,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:40:51" (1/1) ... [2023-08-29 22:40:51,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:40:51" (1/1) ... [2023-08-29 22:40:51,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:40:51" (1/1) ... [2023-08-29 22:40:51,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:40:51" (1/1) ... [2023-08-29 22:40:51,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:40:51" (1/1) ... [2023-08-29 22:40:51,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:40:51" (1/1) ... [2023-08-29 22:40:51,789 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:40:51" (1/1) ... [2023-08-29 22:40:51,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:40:51" (1/1) ... [2023-08-29 22:40:51,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 22:40:51,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 22:40:51,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 22:40:51,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 22:40:51,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:40:51" (1/1) ... [2023-08-29 22:40:51,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:40:51,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:40:51,826 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 22:40:51,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 22:40:51,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 22:40:51,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 22:40:51,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 22:40:51,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 22:40:51,859 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 22:40:51,859 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 22:40:51,859 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 22:40:51,859 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 22:40:51,859 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 22:40:51,859 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 22:40:51,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 22:40:51,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 22:40:51,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 22:40:51,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 22:40:51,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 22:40:51,861 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 22:40:51,954 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 22:40:51,955 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 22:40:52,686 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 22:40:52,700 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 22:40:52,700 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-29 22:40:52,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:40:52 BoogieIcfgContainer [2023-08-29 22:40:52,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 22:40:52,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 22:40:52,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 22:40:52,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 22:40:52,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:40:51" (1/3) ... [2023-08-29 22:40:52,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@336f5934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:40:52, skipping insertion in model container [2023-08-29 22:40:52,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:40:51" (2/3) ... [2023-08-29 22:40:52,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@336f5934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:40:52, skipping insertion in model container [2023-08-29 22:40:52,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:40:52" (3/3) ... [2023-08-29 22:40:52,712 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2023-08-29 22:40:52,726 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 22:40:52,727 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-08-29 22:40:52,727 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 22:40:52,870 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 22:40:52,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 328 places, 346 transitions, 716 flow [2023-08-29 22:40:53,049 INFO L130 PetriNetUnfolder]: 28/343 cut-off events. [2023-08-29 22:40:53,050 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 22:40:53,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 343 events. 28/343 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 662 event pairs, 0 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 260. Up to 2 conditions per place. [2023-08-29 22:40:53,059 INFO L82 GeneralOperation]: Start removeDead. Operand has 328 places, 346 transitions, 716 flow [2023-08-29 22:40:53,068 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 321 places, 339 transitions, 696 flow [2023-08-29 22:40:53,072 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:40:53,086 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 321 places, 339 transitions, 696 flow [2023-08-29 22:40:53,090 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 321 places, 339 transitions, 696 flow [2023-08-29 22:40:53,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 321 places, 339 transitions, 696 flow [2023-08-29 22:40:53,153 INFO L130 PetriNetUnfolder]: 28/339 cut-off events. [2023-08-29 22:40:53,154 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 22:40:53,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352 conditions, 339 events. 28/339 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 663 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 260. Up to 2 conditions per place. [2023-08-29 22:40:53,168 INFO L119 LiptonReduction]: Number of co-enabled transitions 19008 [2023-08-29 22:41:17,836 INFO L134 LiptonReduction]: Checked pairs total: 20431 [2023-08-29 22:41:17,837 INFO L136 LiptonReduction]: Total number of compositions: 398 [2023-08-29 22:41:17,847 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:41:17,854 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;@6ed9afea, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:41:17,854 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-08-29 22:41:17,859 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 22:41:17,859 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:41:17,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:41:17,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:41:17,860 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:41:17,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:41:17,865 INFO L85 PathProgramCache]: Analyzing trace with hash 44154, now seen corresponding path program 1 times [2023-08-29 22:41:17,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:41:17,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378020853] [2023-08-29 22:41:17,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:41:17,876 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:41:17,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:41:17,879 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:41:17,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 22:41:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:41:17,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:41:17,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:41:18,197 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:41:18,198 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 42 [2023-08-29 22:41:18,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:41:18,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:41:18,232 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:41:18,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378020853] [2023-08-29 22:41:18,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378020853] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:41:18,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:41:18,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:41:18,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650535769] [2023-08-29 22:41:18,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:41:18,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:41:18,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:41:18,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:41:18,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:41:18,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 744 [2023-08-29 22:41:18,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 299.6666666666667) internal successors, (899), 3 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:18,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:41:18,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 744 [2023-08-29 22:41:18,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:41:20,717 INFO L130 PetriNetUnfolder]: 11903/16592 cut-off events. [2023-08-29 22:41:20,717 INFO L131 PetriNetUnfolder]: For 444/444 co-relation queries the response was YES. [2023-08-29 22:41:20,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33609 conditions, 16592 events. 11903/16592 cut-off events. For 444/444 co-relation queries the response was YES. Maximal size of possible extension queue 1183. Compared 91362 event pairs, 10226 based on Foata normal form. 0/5881 useless extension candidates. Maximal degree in co-relation 15248. Up to 8299 conditions per place. [2023-08-29 22:41:20,829 INFO L137 encePairwiseOnDemand]: 733/744 looper letters, 110 selfloop transitions, 6 changer transitions 0/116 dead transitions. [2023-08-29 22:41:20,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 116 transitions, 500 flow [2023-08-29 22:41:20,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:41:20,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:41:20,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1020 transitions. [2023-08-29 22:41:20,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45698924731182794 [2023-08-29 22:41:20,849 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1020 transitions. [2023-08-29 22:41:20,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1020 transitions. [2023-08-29 22:41:20,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:41:20,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1020 transitions. [2023-08-29 22:41:20,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 340.0) internal successors, (1020), 3 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:20,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:20,876 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:20,877 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 142 flow. Second operand 3 states and 1020 transitions. [2023-08-29 22:41:20,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 116 transitions, 500 flow [2023-08-29 22:41:20,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 116 transitions, 476 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 22:41:20,889 INFO L231 Difference]: Finished difference. Result has 62 places, 65 transitions, 176 flow [2023-08-29 22:41:20,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=62, PETRI_TRANSITIONS=65} [2023-08-29 22:41:20,895 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -3 predicate places. [2023-08-29 22:41:20,895 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 65 transitions, 176 flow [2023-08-29 22:41:20,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 299.6666666666667) internal successors, (899), 3 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:20,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:41:20,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:41:20,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-29 22:41:21,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:41:21,110 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:41:21,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:41:21,111 INFO L85 PathProgramCache]: Analyzing trace with hash 44153, now seen corresponding path program 1 times [2023-08-29 22:41:21,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:41:21,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [595914169] [2023-08-29 22:41:21,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:41:21,112 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 [2023-08-29 22:41:21,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:41:21,118 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:41:21,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 22:41:21,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:41:21,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 22:41:21,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:41:21,266 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:41:21,267 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 [2023-08-29 22:41:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:41:21,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:41:21,284 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:41:21,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [595914169] [2023-08-29 22:41:21,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [595914169] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:41:21,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:41:21,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:41:21,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732481269] [2023-08-29 22:41:21,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:41:21,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:41:21,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:41:21,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:41:21,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:41:21,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 744 [2023-08-29 22:41:21,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 65 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:21,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:41:21,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 744 [2023-08-29 22:41:21,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:41:23,209 INFO L130 PetriNetUnfolder]: 11903/16586 cut-off events. [2023-08-29 22:41:23,209 INFO L131 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2023-08-29 22:41:23,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33342 conditions, 16586 events. 11903/16586 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 92068 event pairs, 10226 based on Foata normal form. 4/5891 useless extension candidates. Maximal degree in co-relation 16651. Up to 16586 conditions per place. [2023-08-29 22:41:23,297 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 61 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-08-29 22:41:23,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 62 transitions, 294 flow [2023-08-29 22:41:23,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:41:23,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:41:23,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 966 transitions. [2023-08-29 22:41:23,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4327956989247312 [2023-08-29 22:41:23,301 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 966 transitions. [2023-08-29 22:41:23,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 966 transitions. [2023-08-29 22:41:23,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:41:23,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 966 transitions. [2023-08-29 22:41:23,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:23,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:23,309 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:23,309 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 176 flow. Second operand 3 states and 966 transitions. [2023-08-29 22:41:23,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 62 transitions, 294 flow [2023-08-29 22:41:23,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 62 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:41:23,312 INFO L231 Difference]: Finished difference. Result has 59 places, 62 transitions, 160 flow [2023-08-29 22:41:23,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=59, PETRI_TRANSITIONS=62} [2023-08-29 22:41:23,313 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -6 predicate places. [2023-08-29 22:41:23,313 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 62 transitions, 160 flow [2023-08-29 22:41:23,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:23,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:41:23,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:41:23,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-29 22:41:23,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:41:23,530 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:41:23,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:41:23,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1373062, now seen corresponding path program 1 times [2023-08-29 22:41:23,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:41:23,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007652097] [2023-08-29 22:41:23,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:41:23,532 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:41:23,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:41:23,533 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:41:23,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 22:41:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:41:23,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 22:41:23,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:41:23,763 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:41:23,764 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 42 [2023-08-29 22:41:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:41:23,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:41:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:41:23,916 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:41:23,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007652097] [2023-08-29 22:41:23,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007652097] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:41:23,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:41:23,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 22:41:23,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60488886] [2023-08-29 22:41:23,917 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:41:23,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:41:23,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:41:23,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:41:23,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:41:25,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 744 [2023-08-29 22:41:25,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 62 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:25,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:41:25,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 744 [2023-08-29 22:41:25,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:41:30,769 INFO L130 PetriNetUnfolder]: 29756/41459 cut-off events. [2023-08-29 22:41:30,769 INFO L131 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2023-08-29 22:41:30,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83317 conditions, 41459 events. 29756/41459 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 2429. Compared 256414 event pairs, 25565 based on Foata normal form. 0/14706 useless extension candidates. Maximal degree in co-relation 83309. Up to 8297 conditions per place. [2023-08-29 22:41:31,007 INFO L137 encePairwiseOnDemand]: 735/744 looper letters, 248 selfloop transitions, 21 changer transitions 0/269 dead transitions. [2023-08-29 22:41:31,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 269 transitions, 1166 flow [2023-08-29 22:41:31,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:41:31,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:41:31,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2036 transitions. [2023-08-29 22:41:31,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560931899641577 [2023-08-29 22:41:31,013 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2036 transitions. [2023-08-29 22:41:31,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2036 transitions. [2023-08-29 22:41:31,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:41:31,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2036 transitions. [2023-08-29 22:41:31,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 339.3333333333333) internal successors, (2036), 6 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:31,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 744.0) internal successors, (5208), 7 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:31,030 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 744.0) internal successors, (5208), 7 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:31,030 INFO L175 Difference]: Start difference. First operand has 59 places, 62 transitions, 160 flow. Second operand 6 states and 2036 transitions. [2023-08-29 22:41:31,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 269 transitions, 1166 flow [2023-08-29 22:41:31,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 269 transitions, 1165 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:41:31,041 INFO L231 Difference]: Finished difference. Result has 66 places, 77 transitions, 309 flow [2023-08-29 22:41:31,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=309, PETRI_PLACES=66, PETRI_TRANSITIONS=77} [2023-08-29 22:41:31,042 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2023-08-29 22:41:31,043 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 77 transitions, 309 flow [2023-08-29 22:41:31,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:31,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:41:31,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 22:41:31,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-29 22:41:31,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:41:31,253 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:41:31,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:41:31,253 INFO L85 PathProgramCache]: Analyzing trace with hash 42612021, now seen corresponding path program 1 times [2023-08-29 22:41:31,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:41:31,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [880921170] [2023-08-29 22:41:31,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:41:31,254 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:41:31,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:41:31,261 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:41:31,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 22:41:31,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:41:31,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 22:41:31,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:41:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:41:31,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:41:31,358 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:41:31,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [880921170] [2023-08-29 22:41:31,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [880921170] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:41:31,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:41:31,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:41:31,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401469922] [2023-08-29 22:41:31,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:41:31,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:41:31,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:41:31,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:41:31,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:41:31,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 744 [2023-08-29 22:41:31,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 77 transitions, 309 flow. Second operand has 3 states, 3 states have (on average 306.3333333333333) internal successors, (919), 3 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:31,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:41:31,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 744 [2023-08-29 22:41:31,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:41:34,197 INFO L130 PetriNetUnfolder]: 23805/33171 cut-off events. [2023-08-29 22:41:34,197 INFO L131 PetriNetUnfolder]: For 195/195 co-relation queries the response was YES. [2023-08-29 22:41:34,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66717 conditions, 33171 events. 23805/33171 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 2210. Compared 200889 event pairs, 20452 based on Foata normal form. 3/11778 useless extension candidates. Maximal degree in co-relation 66705. Up to 33163 conditions per place. [2023-08-29 22:41:34,357 INFO L137 encePairwiseOnDemand]: 735/744 looper letters, 63 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2023-08-29 22:41:34,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 75 transitions, 451 flow [2023-08-29 22:41:34,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:41:34,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:41:34,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 980 transitions. [2023-08-29 22:41:34,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4390681003584229 [2023-08-29 22:41:34,360 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 980 transitions. [2023-08-29 22:41:34,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 980 transitions. [2023-08-29 22:41:34,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:41:34,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 980 transitions. [2023-08-29 22:41:34,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:34,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:34,368 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:34,368 INFO L175 Difference]: Start difference. First operand has 66 places, 77 transitions, 309 flow. Second operand 3 states and 980 transitions. [2023-08-29 22:41:34,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 75 transitions, 451 flow [2023-08-29 22:41:34,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 75 transitions, 421 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-29 22:41:34,371 INFO L231 Difference]: Finished difference. Result has 68 places, 75 transitions, 313 flow [2023-08-29 22:41:34,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=313, PETRI_PLACES=68, PETRI_TRANSITIONS=75} [2023-08-29 22:41:34,373 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2023-08-29 22:41:34,373 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 75 transitions, 313 flow [2023-08-29 22:41:34,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 306.3333333333333) internal successors, (919), 3 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:34,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:41:34,374 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 22:41:34,388 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 [2023-08-29 22:41:34,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:41:34,586 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:41:34,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:41:34,587 INFO L85 PathProgramCache]: Analyzing trace with hash -2040524934, now seen corresponding path program 2 times [2023-08-29 22:41:34,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:41:34,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [634594012] [2023-08-29 22:41:34,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:41:34,588 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:41:34,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:41:34,589 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:41:34,591 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 (6)] Waiting until timeout for monitored process [2023-08-29 22:41:34,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:41:34,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:41:34,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 22:41:34,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:41:34,747 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:41:34,748 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 42 [2023-08-29 22:41:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:41:34,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:41:35,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:41:35,447 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:41:35,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [634594012] [2023-08-29 22:41:35,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [634594012] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:41:35,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:41:35,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 22:41:35,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041957525] [2023-08-29 22:41:35,448 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:41:35,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 22:41:35,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:41:35,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 22:41:35,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:41:39,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 744 [2023-08-29 22:41:39,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 75 transitions, 313 flow. Second operand has 12 states, 12 states have (on average 288.0) internal successors, (3456), 12 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) [2023-08-29 22:41:39,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:41:39,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 744 [2023-08-29 22:41:39,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:41:42,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:41:44,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:41:46,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:41:47,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:41:48,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:41:50,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:41:53,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:41:54,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:41:56,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:41:58,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:41:59,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:42:01,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:42:03,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:42:05,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:42:12,431 INFO L130 PetriNetUnfolder]: 29761/41486 cut-off events. [2023-08-29 22:42:12,431 INFO L131 PetriNetUnfolder]: For 333/333 co-relation queries the response was YES. [2023-08-29 22:42:12,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83491 conditions, 41486 events. 29761/41486 cut-off events. For 333/333 co-relation queries the response was YES. Maximal size of possible extension queue 1940. Compared 251480 event pairs, 25565 based on Foata normal form. 26/14770 useless extension candidates. Maximal degree in co-relation 83477. Up to 8292 conditions per place. [2023-08-29 22:42:12,636 INFO L137 encePairwiseOnDemand]: 732/744 looper letters, 244 selfloop transitions, 52 changer transitions 0/296 dead transitions. [2023-08-29 22:42:12,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 296 transitions, 1523 flow [2023-08-29 22:42:12,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-29 22:42:12,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-29 22:42:12,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4922 transitions. [2023-08-29 22:42:12,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134744623655914 [2023-08-29 22:42:12,650 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4922 transitions. [2023-08-29 22:42:12,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4922 transitions. [2023-08-29 22:42:12,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:42:12,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4922 transitions. [2023-08-29 22:42:12,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 307.625) internal successors, (4922), 16 states have internal predecessors, (4922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:12,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 744.0) internal successors, (12648), 17 states have internal predecessors, (12648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:12,680 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 744.0) internal successors, (12648), 17 states have internal predecessors, (12648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:12,680 INFO L175 Difference]: Start difference. First operand has 68 places, 75 transitions, 313 flow. Second operand 16 states and 4922 transitions. [2023-08-29 22:42:12,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 296 transitions, 1523 flow [2023-08-29 22:42:12,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 296 transitions, 1491 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:42:12,686 INFO L231 Difference]: Finished difference. Result has 94 places, 106 transitions, 716 flow [2023-08-29 22:42:12,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=716, PETRI_PLACES=94, PETRI_TRANSITIONS=106} [2023-08-29 22:42:12,687 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 29 predicate places. [2023-08-29 22:42:12,687 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 106 transitions, 716 flow [2023-08-29 22:42:12,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 288.0) internal successors, (3456), 12 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) [2023-08-29 22:42:12,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:42:12,688 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-29 22:42:12,698 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 [2023-08-29 22:42:12,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:12,898 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:42:12,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:42:12,898 INFO L85 PathProgramCache]: Analyzing trace with hash 2057655290, now seen corresponding path program 3 times [2023-08-29 22:42:12,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:42:12,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021414473] [2023-08-29 22:42:12,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:42:12,900 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:12,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:42:12,901 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:42:12,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 22:42:13,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-29 22:42:13,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:42:13,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:42:13,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:42:13,199 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 22:42:13,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:42:13,460 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 22:42:13,460 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:42:13,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021414473] [2023-08-29 22:42:13,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021414473] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:42:13,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:42:13,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-29 22:42:13,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654664097] [2023-08-29 22:42:13,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:42:13,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 22:42:13,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:42:13,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 22:42:13,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-29 22:42:14,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 744 [2023-08-29 22:42:14,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 106 transitions, 716 flow. Second operand has 14 states, 14 states have (on average 300.14285714285717) internal successors, (4202), 14 states have internal predecessors, (4202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:14,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:42:14,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 744 [2023-08-29 22:42:14,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:42:15,718 INFO L130 PetriNetUnfolder]: 5949/8304 cut-off events. [2023-08-29 22:42:15,719 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-08-29 22:42:15,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16796 conditions, 8304 events. 5949/8304 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 41369 event pairs, 5113 based on Foata normal form. 3/2959 useless extension candidates. Maximal degree in co-relation 16775. Up to 8289 conditions per place. [2023-08-29 22:42:15,765 INFO L137 encePairwiseOnDemand]: 738/744 looper letters, 48 selfloop transitions, 18 changer transitions 0/66 dead transitions. [2023-08-29 22:42:15,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 66 transitions, 457 flow [2023-08-29 22:42:15,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:42:15,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:42:15,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2461 transitions. [2023-08-29 22:42:15,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134744623655914 [2023-08-29 22:42:15,772 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2461 transitions. [2023-08-29 22:42:15,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2461 transitions. [2023-08-29 22:42:15,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:42:15,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2461 transitions. [2023-08-29 22:42:15,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 307.625) internal successors, (2461), 8 states have internal predecessors, (2461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:15,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:15,787 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:15,787 INFO L175 Difference]: Start difference. First operand has 94 places, 106 transitions, 716 flow. Second operand 8 states and 2461 transitions. [2023-08-29 22:42:15,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 66 transitions, 457 flow [2023-08-29 22:42:15,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 66 transitions, 366 flow, removed 15 selfloop flow, removed 14 redundant places. [2023-08-29 22:42:15,790 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 270 flow [2023-08-29 22:42:15,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=270, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2023-08-29 22:42:15,791 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 11 predicate places. [2023-08-29 22:42:15,791 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 270 flow [2023-08-29 22:42:15,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 300.14285714285717) internal successors, (4202), 14 states have internal predecessors, (4202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:15,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:42:15,793 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2023-08-29 22:42:15,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-29 22:42:16,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:16,004 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:42:16,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:42:16,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1279646817, now seen corresponding path program 1 times [2023-08-29 22:42:16,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:42:16,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352879333] [2023-08-29 22:42:16,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:42:16,005 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:16,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:42:16,006 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:42:16,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 22:42:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:42:16,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 22:42:16,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:42:16,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:42:16,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:42:16,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:42:16,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:42:16,517 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-29 22:42:16,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-29 22:42:16,540 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-29 22:42:16,541 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 [2023-08-29 22:42:16,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:42:16,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:42:16,775 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 22:42:16,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-08-29 22:42:16,934 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:42:16,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:42:16,935 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:42:16,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352879333] [2023-08-29 22:42:16,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352879333] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:42:16,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:42:16,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:42:16,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083231984] [2023-08-29 22:42:16,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:42:16,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:42:16,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:42:16,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:42:16,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:42:17,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 744 [2023-08-29 22:42:17,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 270 flow. Second operand has 5 states, 5 states have (on average 308.4) internal successors, (1542), 5 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:17,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:42:17,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 744 [2023-08-29 22:42:17,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:42:18,230 INFO L130 PetriNetUnfolder]: 4605/6511 cut-off events. [2023-08-29 22:42:18,231 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-08-29 22:42:18,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13170 conditions, 6511 events. 4605/6511 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 31774 event pairs, 3945 based on Foata normal form. 0/2492 useless extension candidates. Maximal degree in co-relation 13157. Up to 6511 conditions per place. [2023-08-29 22:42:18,253 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 63 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-08-29 22:42:18,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 64 transitions, 384 flow [2023-08-29 22:42:18,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:42:18,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:42:18,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 975 transitions. [2023-08-29 22:42:18,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4368279569892473 [2023-08-29 22:42:18,256 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 975 transitions. [2023-08-29 22:42:18,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 975 transitions. [2023-08-29 22:42:18,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:42:18,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 975 transitions. [2023-08-29 22:42:18,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:18,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:18,262 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:18,262 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 270 flow. Second operand 3 states and 975 transitions. [2023-08-29 22:42:18,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 64 transitions, 384 flow [2023-08-29 22:42:18,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 64 transitions, 348 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-29 22:42:18,265 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 222 flow [2023-08-29 22:42:18,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2023-08-29 22:42:18,265 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2023-08-29 22:42:18,266 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 222 flow [2023-08-29 22:42:18,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 308.4) internal successors, (1542), 5 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:18,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:42:18,266 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2023-08-29 22:42:18,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-29 22:42:18,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:18,481 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:42:18,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:42:18,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1279646816, now seen corresponding path program 1 times [2023-08-29 22:42:18,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:42:18,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979317632] [2023-08-29 22:42:18,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:42:18,482 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 [2023-08-29 22:42:18,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:42:18,483 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:42:18,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 22:42:18,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:42:18,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 22:42:18,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:42:18,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:42:18,873 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-29 22:42:18,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-29 22:42:19,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:42:19,286 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-29 22:42:19,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2023-08-29 22:42:20,009 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-08-29 22:42:20,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 80 [2023-08-29 22:42:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:42:20,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:42:20,722 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:42:20,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979317632] [2023-08-29 22:42:20,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979317632] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:42:20,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:42:20,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:42:20,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973813935] [2023-08-29 22:42:20,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:42:20,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:42:20,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:42:20,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:42:20,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:42:21,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 744 [2023-08-29 22:42:21,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 222 flow. Second operand has 4 states, 4 states have (on average 310.75) internal successors, (1243), 4 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:21,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:42:21,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 744 [2023-08-29 22:42:21,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:42:21,958 INFO L130 PetriNetUnfolder]: 3261/4718 cut-off events. [2023-08-29 22:42:21,958 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-08-29 22:42:21,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9562 conditions, 4718 events. 3261/4718 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 22499 event pairs, 2777 based on Foata normal form. 0/2028 useless extension candidates. Maximal degree in co-relation 9549. Up to 4718 conditions per place. [2023-08-29 22:42:21,975 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 61 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-08-29 22:42:21,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 62 transitions, 332 flow [2023-08-29 22:42:21,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:42:21,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:42:21,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 979 transitions. [2023-08-29 22:42:21,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43862007168458783 [2023-08-29 22:42:21,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 979 transitions. [2023-08-29 22:42:21,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 979 transitions. [2023-08-29 22:42:21,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:42:21,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 979 transitions. [2023-08-29 22:42:21,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.3333333333333) internal successors, (979), 3 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:21,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:21,988 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:21,988 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 222 flow. Second operand 3 states and 979 transitions. [2023-08-29 22:42:21,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 62 transitions, 332 flow [2023-08-29 22:42:21,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 62 transitions, 331 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:42:21,990 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 209 flow [2023-08-29 22:42:21,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2023-08-29 22:42:21,991 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2023-08-29 22:42:21,991 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 209 flow [2023-08-29 22:42:21,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 310.75) internal successors, (1243), 4 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:21,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:42:21,992 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-08-29 22:42:22,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-29 22:42:22,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:22,204 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:42:22,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:42:22,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1379914459, now seen corresponding path program 1 times [2023-08-29 22:42:22,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:42:22,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348234218] [2023-08-29 22:42:22,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:42:22,205 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:22,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:42:22,206 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:42:22,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 22:42:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:42:22,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 22:42:22,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:42:22,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:42:22,583 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-29 22:42:22,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-29 22:42:22,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:42:22,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:42:22,870 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 22:42:22,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:42:22,989 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:42:22,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:42:22,990 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:42:22,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348234218] [2023-08-29 22:42:22,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348234218] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:42:22,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:42:22,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:42:22,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134622832] [2023-08-29 22:42:22,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:42:22,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:42:22,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:42:22,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:42:22,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:42:23,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 744 [2023-08-29 22:42:23,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 62 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 311.25) internal successors, (1245), 4 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:23,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:42:23,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 744 [2023-08-29 22:42:23,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:42:23,880 INFO L130 PetriNetUnfolder]: 3141/4534 cut-off events. [2023-08-29 22:42:23,880 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-08-29 22:42:23,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9195 conditions, 4534 events. 3141/4534 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 21437 event pairs, 2673 based on Foata normal form. 0/1988 useless extension candidates. Maximal degree in co-relation 9182. Up to 4534 conditions per place. [2023-08-29 22:42:23,901 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 59 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2023-08-29 22:42:23,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 60 transitions, 325 flow [2023-08-29 22:42:23,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:42:23,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:42:23,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 977 transitions. [2023-08-29 22:42:23,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43772401433691754 [2023-08-29 22:42:23,904 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 977 transitions. [2023-08-29 22:42:23,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 977 transitions. [2023-08-29 22:42:23,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:42:23,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 977 transitions. [2023-08-29 22:42:23,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.6666666666667) internal successors, (977), 3 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:23,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:23,910 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:23,910 INFO L175 Difference]: Start difference. First operand has 68 places, 62 transitions, 209 flow. Second operand 3 states and 977 transitions. [2023-08-29 22:42:23,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 60 transitions, 325 flow [2023-08-29 22:42:23,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 60 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:42:23,912 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 206 flow [2023-08-29 22:42:23,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2023-08-29 22:42:23,913 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2023-08-29 22:42:23,913 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 206 flow [2023-08-29 22:42:23,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 311.25) internal successors, (1245), 4 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:23,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:42:23,914 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-08-29 22:42:23,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-29 22:42:24,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:24,126 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:42:24,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:42:24,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1379914460, now seen corresponding path program 1 times [2023-08-29 22:42:24,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:42:24,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145168089] [2023-08-29 22:42:24,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:42:24,127 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:24,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:42:24,128 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:42:24,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 22:42:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:42:24,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 22:42:24,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:42:24,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:42:24,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:42:24,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:42:24,526 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:42:24,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-29 22:42:24,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-29 22:42:24,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:42:24,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:42:24,752 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 22:42:24,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-08-29 22:42:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:42:24,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:42:24,966 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:42:24,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145168089] [2023-08-29 22:42:24,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145168089] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:42:24,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:42:24,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:42:24,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138349748] [2023-08-29 22:42:24,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:42:24,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:42:24,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:42:24,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:42:24,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:42:25,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 744 [2023-08-29 22:42:25,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 206 flow. Second operand has 5 states, 5 states have (on average 308.8) internal successors, (1544), 5 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:25,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:42:25,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 744 [2023-08-29 22:42:25,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:42:26,086 INFO L130 PetriNetUnfolder]: 3021/4350 cut-off events. [2023-08-29 22:42:26,086 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-08-29 22:42:26,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8828 conditions, 4350 events. 3021/4350 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 20502 event pairs, 2569 based on Foata normal form. 0/1948 useless extension candidates. Maximal degree in co-relation 8815. Up to 4350 conditions per place. [2023-08-29 22:42:26,101 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 57 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-08-29 22:42:26,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 58 transitions, 318 flow [2023-08-29 22:42:26,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:42:26,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:42:26,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 969 transitions. [2023-08-29 22:42:26,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43413978494623656 [2023-08-29 22:42:26,104 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 969 transitions. [2023-08-29 22:42:26,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 969 transitions. [2023-08-29 22:42:26,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:42:26,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 969 transitions. [2023-08-29 22:42:26,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:26,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:26,108 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:26,108 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 206 flow. Second operand 3 states and 969 transitions. [2023-08-29 22:42:26,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 58 transitions, 318 flow [2023-08-29 22:42:26,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 58 transitions, 317 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:42:26,110 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 203 flow [2023-08-29 22:42:26,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=203, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2023-08-29 22:42:26,113 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2023-08-29 22:42:26,114 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 203 flow [2023-08-29 22:42:26,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 308.8) internal successors, (1544), 5 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:26,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:42:26,114 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:42:26,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 22:42:26,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:26,318 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:42:26,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:42:26,319 INFO L85 PathProgramCache]: Analyzing trace with hash 172327785, now seen corresponding path program 1 times [2023-08-29 22:42:26,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:42:26,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743699777] [2023-08-29 22:42:26,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:42:26,319 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:26,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:42:26,320 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:42:26,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 22:42:26,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:42:26,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 22:42:26,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:42:26,693 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:42:26,694 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 [2023-08-29 22:42:26,729 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 22:42:26,730 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 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 22:42:26,751 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 22:42:26,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:42:26,769 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:42:26,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:42:26,769 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:42:26,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743699777] [2023-08-29 22:42:26,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743699777] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:42:26,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:42:26,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:42:26,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751091100] [2023-08-29 22:42:26,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:42:26,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:42:26,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:42:26,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:42:26,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:42:27,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 744 [2023-08-29 22:42:27,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 203 flow. Second operand has 4 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:27,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:42:27,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 744 [2023-08-29 22:42:27,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:42:27,386 INFO L130 PetriNetUnfolder]: 2359/3410 cut-off events. [2023-08-29 22:42:27,387 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2023-08-29 22:42:27,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6940 conditions, 3410 events. 2359/3410 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 15335 event pairs, 1973 based on Foata normal form. 0/1618 useless extension candidates. Maximal degree in co-relation 6927. Up to 3404 conditions per place. [2023-08-29 22:42:27,399 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 54 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-08-29 22:42:27,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 56 transitions, 311 flow [2023-08-29 22:42:27,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:42:27,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:42:27,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1230 transitions. [2023-08-29 22:42:27,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41330645161290325 [2023-08-29 22:42:27,401 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1230 transitions. [2023-08-29 22:42:27,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1230 transitions. [2023-08-29 22:42:27,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:42:27,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1230 transitions. [2023-08-29 22:42:27,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 307.5) internal successors, (1230), 4 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:27,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:27,406 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:27,406 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 203 flow. Second operand 4 states and 1230 transitions. [2023-08-29 22:42:27,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 56 transitions, 311 flow [2023-08-29 22:42:27,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 56 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:42:27,408 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 202 flow [2023-08-29 22:42:27,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=66, PETRI_TRANSITIONS=56} [2023-08-29 22:42:27,408 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2023-08-29 22:42:27,409 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 202 flow [2023-08-29 22:42:27,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:27,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:42:27,409 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:42:27,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-29 22:42:27,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:27,622 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:42:27,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:42:27,622 INFO L85 PathProgramCache]: Analyzing trace with hash 172327851, now seen corresponding path program 1 times [2023-08-29 22:42:27,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:42:27,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086184781] [2023-08-29 22:42:27,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:42:27,623 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:27,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:42:27,624 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:42:27,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 22:42:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:42:27,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:42:27,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:42:27,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:42:27,994 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 22:42:27,994 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 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 22:42:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:42:28,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:42:28,010 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:42:28,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086184781] [2023-08-29 22:42:28,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086184781] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:42:28,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:42:28,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:42:28,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90314098] [2023-08-29 22:42:28,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:42:28,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:42:28,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:42:28,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:42:28,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:42:28,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 744 [2023-08-29 22:42:28,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 56 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:28,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:42:28,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 744 [2023-08-29 22:42:28,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:42:28,535 INFO L130 PetriNetUnfolder]: 1801/2614 cut-off events. [2023-08-29 22:42:28,535 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2023-08-29 22:42:28,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5335 conditions, 2614 events. 1801/2614 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 11123 event pairs, 1477 based on Foata normal form. 0/1336 useless extension candidates. Maximal degree in co-relation 5322. Up to 2602 conditions per place. [2023-08-29 22:42:28,544 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 52 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-29 22:42:28,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 54 transitions, 306 flow [2023-08-29 22:42:28,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:42:28,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:42:28,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1228 transitions. [2023-08-29 22:42:28,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41263440860215056 [2023-08-29 22:42:28,547 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1228 transitions. [2023-08-29 22:42:28,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1228 transitions. [2023-08-29 22:42:28,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:42:28,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1228 transitions. [2023-08-29 22:42:28,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:28,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:28,552 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:28,552 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 202 flow. Second operand 4 states and 1228 transitions. [2023-08-29 22:42:28,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 54 transitions, 306 flow [2023-08-29 22:42:28,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 54 transitions, 303 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:42:28,554 INFO L231 Difference]: Finished difference. Result has 65 places, 54 transitions, 199 flow [2023-08-29 22:42:28,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=65, PETRI_TRANSITIONS=54} [2023-08-29 22:42:28,555 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 0 predicate places. [2023-08-29 22:42:28,555 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 54 transitions, 199 flow [2023-08-29 22:42:28,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:28,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:42:28,556 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:42:28,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-29 22:42:28,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:28,768 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:42:28,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:42:28,769 INFO L85 PathProgramCache]: Analyzing trace with hash 172327786, now seen corresponding path program 1 times [2023-08-29 22:42:28,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:42:28,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263338945] [2023-08-29 22:42:28,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:42:28,769 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:28,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:42:28,770 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:42:28,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 22:42:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:42:29,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 22:42:29,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:42:29,160 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:42:29,160 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 42 [2023-08-29 22:42:29,234 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:42:29,235 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 [2023-08-29 22:42:29,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:42:29,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:42:29,309 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:42:29,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:42:29,356 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:42:29,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:42:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:42:29,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:42:29,407 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:42:29,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [263338945] [2023-08-29 22:42:29,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [263338945] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:42:29,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:42:29,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:42:29,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120634108] [2023-08-29 22:42:29,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:42:29,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:42:29,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:42:29,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:42:29,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:42:29,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 744 [2023-08-29 22:42:29,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 54 transitions, 199 flow. Second operand has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:29,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:42:29,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 744 [2023-08-29 22:42:29,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:42:30,562 INFO L130 PetriNetUnfolder]: 3065/4444 cut-off events. [2023-08-29 22:42:30,563 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2023-08-29 22:42:30,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9028 conditions, 4444 events. 3065/4444 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 22214 event pairs, 1477 based on Foata normal form. 0/2270 useless extension candidates. Maximal degree in co-relation 9015. Up to 2608 conditions per place. [2023-08-29 22:42:30,581 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 82 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2023-08-29 22:42:30,581 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 86 transitions, 440 flow [2023-08-29 22:42:30,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:42:30,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:42:30,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1545 transitions. [2023-08-29 22:42:30,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153225806451613 [2023-08-29 22:42:30,584 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1545 transitions. [2023-08-29 22:42:30,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1545 transitions. [2023-08-29 22:42:30,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:42:30,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1545 transitions. [2023-08-29 22:42:30,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 309.0) internal successors, (1545), 5 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:30,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:30,590 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:30,590 INFO L175 Difference]: Start difference. First operand has 65 places, 54 transitions, 199 flow. Second operand 5 states and 1545 transitions. [2023-08-29 22:42:30,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 86 transitions, 440 flow [2023-08-29 22:42:30,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 86 transitions, 437 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:42:30,593 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 212 flow [2023-08-29 22:42:30,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2023-08-29 22:42:30,594 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2023-08-29 22:42:30,594 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 212 flow [2023-08-29 22:42:30,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:30,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:42:30,595 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:42:30,605 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 [2023-08-29 22:42:30,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:30,801 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:42:30,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:42:30,801 INFO L85 PathProgramCache]: Analyzing trace with hash 172327850, now seen corresponding path program 1 times [2023-08-29 22:42:30,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:42:30,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507978122] [2023-08-29 22:42:30,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:42:30,802 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 [2023-08-29 22:42:30,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:42:30,803 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:42:30,804 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 (15)] Waiting until timeout for monitored process [2023-08-29 22:42:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:42:31,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 22:42:31,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:42:31,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:42:31,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:42:31,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:42:31,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:42:31,200 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:42:31,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:42:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:42:31,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:42:31,242 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:42:31,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507978122] [2023-08-29 22:42:31,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507978122] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:42:31,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:42:31,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:42:31,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58083459] [2023-08-29 22:42:31,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:42:31,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:42:31,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:42:31,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:42:31,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:42:31,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 744 [2023-08-29 22:42:31,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:31,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:42:31,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 744 [2023-08-29 22:42:31,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:42:32,241 INFO L130 PetriNetUnfolder]: 2797/4062 cut-off events. [2023-08-29 22:42:32,241 INFO L131 PetriNetUnfolder]: For 599/599 co-relation queries the response was YES. [2023-08-29 22:42:32,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8828 conditions, 4062 events. 2797/4062 cut-off events. For 599/599 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 19834 event pairs, 1477 based on Foata normal form. 0/2250 useless extension candidates. Maximal degree in co-relation 8814. Up to 2602 conditions per place. [2023-08-29 22:42:32,257 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 81 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2023-08-29 22:42:32,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 85 transitions, 447 flow [2023-08-29 22:42:32,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:42:32,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:42:32,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1544 transitions. [2023-08-29 22:42:32,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4150537634408602 [2023-08-29 22:42:32,260 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1544 transitions. [2023-08-29 22:42:32,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1544 transitions. [2023-08-29 22:42:32,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:42:32,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1544 transitions. [2023-08-29 22:42:32,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 308.8) internal successors, (1544), 5 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:32,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:32,265 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:32,265 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 212 flow. Second operand 5 states and 1544 transitions. [2023-08-29 22:42:32,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 85 transitions, 447 flow [2023-08-29 22:42:32,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 85 transitions, 441 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:42:32,267 INFO L231 Difference]: Finished difference. Result has 70 places, 55 transitions, 218 flow [2023-08-29 22:42:32,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=70, PETRI_TRANSITIONS=55} [2023-08-29 22:42:32,268 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 5 predicate places. [2023-08-29 22:42:32,268 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 55 transitions, 218 flow [2023-08-29 22:42:32,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:32,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:42:32,268 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:42:32,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-29 22:42:32,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:32,469 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:42:32,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:42:32,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1047128380, now seen corresponding path program 1 times [2023-08-29 22:42:32,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:42:32,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277614466] [2023-08-29 22:42:32,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:42:32,470 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:32,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:42:32,471 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:42:32,471 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 (16)] Waiting until timeout for monitored process [2023-08-29 22:42:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:42:32,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 22:42:32,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:42:32,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:42:32,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:42:32,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:42:32,922 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:42:32,922 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 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-29 22:42:32,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-08-29 22:42:32,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:42:32,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:42:33,073 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 22:42:33,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-08-29 22:42:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:42:33,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:42:33,235 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:42:33,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277614466] [2023-08-29 22:42:33,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277614466] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:42:33,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:42:33,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:42:33,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010235778] [2023-08-29 22:42:33,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:42:33,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:42:33,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:42:33,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:42:33,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:42:33,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 744 [2023-08-29 22:42:33,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 55 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 307.2) internal successors, (1536), 5 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:33,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:42:33,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 744 [2023-08-29 22:42:33,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:42:34,283 INFO L130 PetriNetUnfolder]: 2659/3849 cut-off events. [2023-08-29 22:42:34,284 INFO L131 PetriNetUnfolder]: For 1345/1345 co-relation queries the response was YES. [2023-08-29 22:42:34,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8689 conditions, 3849 events. 2659/3849 cut-off events. For 1345/1345 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 17496 event pairs, 2233 based on Foata normal form. 0/2284 useless extension candidates. Maximal degree in co-relation 8674. Up to 3849 conditions per place. [2023-08-29 22:42:34,299 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 52 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-08-29 22:42:34,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 53 transitions, 320 flow [2023-08-29 22:42:34,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:42:34,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:42:34,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 957 transitions. [2023-08-29 22:42:34,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42876344086021506 [2023-08-29 22:42:34,302 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 957 transitions. [2023-08-29 22:42:34,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 957 transitions. [2023-08-29 22:42:34,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:42:34,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 957 transitions. [2023-08-29 22:42:34,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:34,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:34,306 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:34,306 INFO L175 Difference]: Start difference. First operand has 70 places, 55 transitions, 218 flow. Second operand 3 states and 957 transitions. [2023-08-29 22:42:34,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 53 transitions, 320 flow [2023-08-29 22:42:34,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 53 transitions, 312 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 22:42:34,307 INFO L231 Difference]: Finished difference. Result has 66 places, 53 transitions, 208 flow [2023-08-29 22:42:34,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=66, PETRI_TRANSITIONS=53} [2023-08-29 22:42:34,308 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2023-08-29 22:42:34,308 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 53 transitions, 208 flow [2023-08-29 22:42:34,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 307.2) internal successors, (1536), 5 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:34,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:42:34,308 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:42:34,317 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 [2023-08-29 22:42:34,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:34,509 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:42:34,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:42:34,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1047128379, now seen corresponding path program 1 times [2023-08-29 22:42:34,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:42:34,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341094935] [2023-08-29 22:42:34,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:42:34,509 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:34,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:42:34,510 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:42:34,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-29 22:42:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:42:34,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 22:42:34,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:42:34,951 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-29 22:42:34,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-08-29 22:42:35,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:42:35,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:42:35,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:42:35,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:42:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:42:35,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:42:35,200 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:42:35,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341094935] [2023-08-29 22:42:35,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341094935] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:42:35,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:42:35,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:42:35,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457948688] [2023-08-29 22:42:35,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:42:35,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:42:35,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:42:35,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:42:35,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:42:35,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 744 [2023-08-29 22:42:35,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 53 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 305.2) internal successors, (1526), 5 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:35,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:42:35,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 744 [2023-08-29 22:42:35,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:42:36,287 INFO L130 PetriNetUnfolder]: 2521/3636 cut-off events. [2023-08-29 22:42:36,287 INFO L131 PetriNetUnfolder]: For 763/763 co-relation queries the response was YES. [2023-08-29 22:42:36,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8006 conditions, 3636 events. 2521/3636 cut-off events. For 763/763 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 16365 event pairs, 2113 based on Foata normal form. 0/2204 useless extension candidates. Maximal degree in co-relation 7991. Up to 3636 conditions per place. [2023-08-29 22:42:36,301 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 50 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-29 22:42:36,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 51 transitions, 306 flow [2023-08-29 22:42:36,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:42:36,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:42:36,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 949 transitions. [2023-08-29 22:42:36,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425179211469534 [2023-08-29 22:42:36,305 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 949 transitions. [2023-08-29 22:42:36,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 949 transitions. [2023-08-29 22:42:36,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:42:36,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 949 transitions. [2023-08-29 22:42:36,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 316.3333333333333) internal successors, (949), 3 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:36,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:36,310 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:36,310 INFO L175 Difference]: Start difference. First operand has 66 places, 53 transitions, 208 flow. Second operand 3 states and 949 transitions. [2023-08-29 22:42:36,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 51 transitions, 306 flow [2023-08-29 22:42:36,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 51 transitions, 305 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:42:36,312 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 205 flow [2023-08-29 22:42:36,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=65, PETRI_TRANSITIONS=51} [2023-08-29 22:42:36,314 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 0 predicate places. [2023-08-29 22:42:36,314 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 205 flow [2023-08-29 22:42:36,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 305.2) internal successors, (1526), 5 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:36,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:42:36,314 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:42:36,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-29 22:42:36,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:36,525 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:42:36,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:42:36,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1896615727, now seen corresponding path program 1 times [2023-08-29 22:42:36,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:42:36,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312890688] [2023-08-29 22:42:36,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:42:36,526 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:36,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:42:36,527 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:42:36,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-29 22:42:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:42:36,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 22:42:36,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:42:37,020 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:42:37,020 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 42 [2023-08-29 22:42:37,123 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:42:37,124 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 [2023-08-29 22:42:37,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:42:37,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:42:37,205 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:42:37,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:42:37,243 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:42:37,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:42:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:42:37,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:42:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:42:39,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:42:39,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312890688] [2023-08-29 22:42:39,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312890688] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:42:39,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:42:39,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-08-29 22:42:39,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582228960] [2023-08-29 22:42:39,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:42:39,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 22:42:39,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:42:39,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 22:42:39,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-29 22:42:44,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:42:47,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:42:48,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 744 [2023-08-29 22:42:48,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 51 transitions, 205 flow. Second operand has 11 states, 11 states have (on average 294.1818181818182) internal successors, (3236), 11 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:48,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:42:48,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 744 [2023-08-29 22:42:48,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:42:50,060 INFO L130 PetriNetUnfolder]: 5561/7970 cut-off events. [2023-08-29 22:42:50,060 INFO L131 PetriNetUnfolder]: For 502/502 co-relation queries the response was YES. [2023-08-29 22:42:50,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17255 conditions, 7970 events. 5561/7970 cut-off events. For 502/502 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 40875 event pairs, 901 based on Foata normal form. 300/5082 useless extension candidates. Maximal degree in co-relation 17240. Up to 1838 conditions per place. [2023-08-29 22:42:50,100 INFO L137 encePairwiseOnDemand]: 737/744 looper letters, 151 selfloop transitions, 9 changer transitions 0/160 dead transitions. [2023-08-29 22:42:50,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 160 transitions, 773 flow [2023-08-29 22:42:50,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:42:50,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:42:50,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2487 transitions. [2023-08-29 22:42:50,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4178427419354839 [2023-08-29 22:42:50,105 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2487 transitions. [2023-08-29 22:42:50,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2487 transitions. [2023-08-29 22:42:50,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:42:50,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2487 transitions. [2023-08-29 22:42:50,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 310.875) internal successors, (2487), 8 states have internal predecessors, (2487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:50,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:50,111 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:50,112 INFO L175 Difference]: Start difference. First operand has 65 places, 51 transitions, 205 flow. Second operand 8 states and 2487 transitions. [2023-08-29 22:42:50,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 160 transitions, 773 flow [2023-08-29 22:42:50,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 160 transitions, 772 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:42:50,114 INFO L231 Difference]: Finished difference. Result has 75 places, 55 transitions, 259 flow [2023-08-29 22:42:50,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=259, PETRI_PLACES=75, PETRI_TRANSITIONS=55} [2023-08-29 22:42:50,115 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 10 predicate places. [2023-08-29 22:42:50,115 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 55 transitions, 259 flow [2023-08-29 22:42:50,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 294.1818181818182) internal successors, (3236), 11 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:50,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:42:50,116 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:42:50,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-29 22:42:50,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:50,322 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:42:50,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:42:50,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1896615663, now seen corresponding path program 1 times [2023-08-29 22:42:50,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:42:50,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973480283] [2023-08-29 22:42:50,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:42:50,323 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:50,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:42:50,324 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:42:50,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-29 22:42:50,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:42:50,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 22:42:50,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:42:50,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:42:50,728 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:42:50,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:42:50,809 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:42:50,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:42:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:42:51,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:42:51,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973480283] [2023-08-29 22:42:51,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973480283] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:42:51,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:42:51,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-29 22:42:51,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053777537] [2023-08-29 22:42:51,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:42:51,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:42:51,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:42:51,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:42:51,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:42:54,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 744 [2023-08-29 22:42:54,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 55 transitions, 259 flow. Second operand has 10 states, 10 states have (on average 301.2) internal successors, (3012), 10 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:54,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:42:54,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 744 [2023-08-29 22:42:54,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:42:56,119 INFO L130 PetriNetUnfolder]: 5221/7530 cut-off events. [2023-08-29 22:42:56,119 INFO L131 PetriNetUnfolder]: For 3670/3670 co-relation queries the response was YES. [2023-08-29 22:42:56,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18373 conditions, 7530 events. 5221/7530 cut-off events. For 3670/3670 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 37947 event pairs, 1325 based on Foata normal form. 300/5254 useless extension candidates. Maximal degree in co-relation 18354. Up to 2326 conditions per place. [2023-08-29 22:42:56,154 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 151 selfloop transitions, 7 changer transitions 0/158 dead transitions. [2023-08-29 22:42:56,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 158 transitions, 809 flow [2023-08-29 22:42:56,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:42:56,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:42:56,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2541 transitions. [2023-08-29 22:42:56,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4269153225806452 [2023-08-29 22:42:56,159 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2541 transitions. [2023-08-29 22:42:56,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2541 transitions. [2023-08-29 22:42:56,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:42:56,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2541 transitions. [2023-08-29 22:42:56,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 317.625) internal successors, (2541), 8 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:56,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:56,165 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:56,165 INFO L175 Difference]: Start difference. First operand has 75 places, 55 transitions, 259 flow. Second operand 8 states and 2541 transitions. [2023-08-29 22:42:56,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 158 transitions, 809 flow [2023-08-29 22:42:56,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 158 transitions, 792 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-29 22:42:56,190 INFO L231 Difference]: Finished difference. Result has 79 places, 55 transitions, 262 flow [2023-08-29 22:42:56,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=262, PETRI_PLACES=79, PETRI_TRANSITIONS=55} [2023-08-29 22:42:56,191 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 14 predicate places. [2023-08-29 22:42:56,191 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 55 transitions, 262 flow [2023-08-29 22:42:56,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 301.2) internal successors, (3012), 10 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:56,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:42:56,192 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:42:56,204 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 (19)] Ended with exit code 0 [2023-08-29 22:42:56,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:56,405 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:42:56,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:42:56,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1898756499, now seen corresponding path program 1 times [2023-08-29 22:42:56,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:42:56,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487586430] [2023-08-29 22:42:56,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:42:56,405 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:56,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:42:56,406 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:42:56,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-29 22:42:56,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:42:56,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:42:56,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:42:56,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:42:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:42:56,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:42:56,756 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:42:56,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487586430] [2023-08-29 22:42:56,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487586430] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:42:56,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:42:56,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:42:56,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261695653] [2023-08-29 22:42:56,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:42:56,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:42:56,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:42:56,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:42:56,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:42:57,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 744 [2023-08-29 22:42:57,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 55 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 302.4) internal successors, (1512), 5 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:57,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:42:57,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 744 [2023-08-29 22:42:57,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:42:58,457 INFO L130 PetriNetUnfolder]: 8941/12880 cut-off events. [2023-08-29 22:42:58,457 INFO L131 PetriNetUnfolder]: For 7706/7706 co-relation queries the response was YES. [2023-08-29 22:42:58,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31334 conditions, 12880 events. 8941/12880 cut-off events. For 7706/7706 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 72059 event pairs, 4477 based on Foata normal form. 0/8238 useless extension candidates. Maximal degree in co-relation 31315. Up to 7512 conditions per place. [2023-08-29 22:42:58,555 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 82 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2023-08-29 22:42:58,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 86 transitions, 556 flow [2023-08-29 22:42:58,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:42:58,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:42:58,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1565 transitions. [2023-08-29 22:42:58,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4206989247311828 [2023-08-29 22:42:58,558 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1565 transitions. [2023-08-29 22:42:58,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1565 transitions. [2023-08-29 22:42:58,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:42:58,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1565 transitions. [2023-08-29 22:42:58,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:58,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:58,563 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:58,563 INFO L175 Difference]: Start difference. First operand has 79 places, 55 transitions, 262 flow. Second operand 5 states and 1565 transitions. [2023-08-29 22:42:58,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 86 transitions, 556 flow [2023-08-29 22:42:58,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 86 transitions, 536 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 22:42:58,569 INFO L231 Difference]: Finished difference. Result has 78 places, 56 transitions, 266 flow [2023-08-29 22:42:58,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=78, PETRI_TRANSITIONS=56} [2023-08-29 22:42:58,570 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 13 predicate places. [2023-08-29 22:42:58,570 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 56 transitions, 266 flow [2023-08-29 22:42:58,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 302.4) internal successors, (1512), 5 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:58,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:42:58,571 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:42:58,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-08-29 22:42:58,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:58,783 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:42:58,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:42:58,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1898756566, now seen corresponding path program 1 times [2023-08-29 22:42:58,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:42:58,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700519155] [2023-08-29 22:42:58,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:42:58,784 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:42:58,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:42:58,785 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:42:58,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-29 22:42:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:42:59,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 22:42:59,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:42:59,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:42:59,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:42:59,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:42:59,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:42:59,219 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:42:59,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:42:59,277 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:42:59,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:42:59,278 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:42:59,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700519155] [2023-08-29 22:42:59,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700519155] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:42:59,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:42:59,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:42:59,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691220247] [2023-08-29 22:42:59,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:42:59,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:42:59,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:42:59,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:42:59,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:42:59,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 744 [2023-08-29 22:42:59,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 56 transitions, 266 flow. Second operand has 5 states, 5 states have (on average 296.4) internal successors, (1482), 5 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:59,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:42:59,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 744 [2023-08-29 22:42:59,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:43:00,966 INFO L130 PetriNetUnfolder]: 8209/11836 cut-off events. [2023-08-29 22:43:00,966 INFO L131 PetriNetUnfolder]: For 6352/6352 co-relation queries the response was YES. [2023-08-29 22:43:01,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29731 conditions, 11836 events. 8209/11836 cut-off events. For 6352/6352 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 65034 event pairs, 4477 based on Foata normal form. 0/8016 useless extension candidates. Maximal degree in co-relation 29711. Up to 7518 conditions per place. [2023-08-29 22:43:01,041 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 81 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2023-08-29 22:43:01,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 85 transitions, 546 flow [2023-08-29 22:43:01,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:43:01,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:43:01,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1534 transitions. [2023-08-29 22:43:01,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41236559139784945 [2023-08-29 22:43:01,044 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1534 transitions. [2023-08-29 22:43:01,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1534 transitions. [2023-08-29 22:43:01,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:43:01,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1534 transitions. [2023-08-29 22:43:01,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 306.8) internal successors, (1534), 5 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:01,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:01,049 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:01,049 INFO L175 Difference]: Start difference. First operand has 78 places, 56 transitions, 266 flow. Second operand 5 states and 1534 transitions. [2023-08-29 22:43:01,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 85 transitions, 546 flow [2023-08-29 22:43:01,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 85 transitions, 540 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:43:01,055 INFO L231 Difference]: Finished difference. Result has 80 places, 56 transitions, 272 flow [2023-08-29 22:43:01,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=272, PETRI_PLACES=80, PETRI_TRANSITIONS=56} [2023-08-29 22:43:01,055 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 15 predicate places. [2023-08-29 22:43:01,055 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 56 transitions, 272 flow [2023-08-29 22:43:01,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 296.4) internal successors, (1482), 5 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:01,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:43:01,056 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:43:01,065 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 (21)] Forceful destruction successful, exit code 0 [2023-08-29 22:43:01,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:43:01,256 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:43:01,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:43:01,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1898756500, now seen corresponding path program 1 times [2023-08-29 22:43:01,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:43:01,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435939208] [2023-08-29 22:43:01,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:43:01,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:43:01,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:43:01,258 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:43:01,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-29 22:43:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:43:01,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 22:43:01,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:43:01,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:43:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:43:01,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:43:01,555 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:43:01,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435939208] [2023-08-29 22:43:01,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435939208] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:43:01,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:43:01,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:43:01,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023916489] [2023-08-29 22:43:01,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:43:01,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:43:01,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:43:01,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:43:01,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:43:01,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 744 [2023-08-29 22:43:01,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 56 transitions, 272 flow. Second operand has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:01,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:43:01,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 744 [2023-08-29 22:43:01,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:43:02,665 INFO L130 PetriNetUnfolder]: 5735/8304 cut-off events. [2023-08-29 22:43:02,665 INFO L131 PetriNetUnfolder]: For 5532/5532 co-relation queries the response was YES. [2023-08-29 22:43:02,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21958 conditions, 8304 events. 5735/8304 cut-off events. For 5532/5532 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 41862 event pairs, 4925 based on Foata normal form. 0/6360 useless extension candidates. Maximal degree in co-relation 21937. Up to 8286 conditions per place. [2023-08-29 22:43:02,709 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 52 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-29 22:43:02,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 54 transitions, 376 flow [2023-08-29 22:43:02,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:43:02,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:43:02,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1222 transitions. [2023-08-29 22:43:02,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106182795698925 [2023-08-29 22:43:02,711 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1222 transitions. [2023-08-29 22:43:02,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1222 transitions. [2023-08-29 22:43:02,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:43:02,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1222 transitions. [2023-08-29 22:43:02,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 305.5) internal successors, (1222), 4 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:02,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:02,714 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:02,714 INFO L175 Difference]: Start difference. First operand has 80 places, 56 transitions, 272 flow. Second operand 4 states and 1222 transitions. [2023-08-29 22:43:02,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 54 transitions, 376 flow [2023-08-29 22:43:02,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 54 transitions, 368 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 22:43:02,721 INFO L231 Difference]: Finished difference. Result has 77 places, 54 transitions, 264 flow [2023-08-29 22:43:02,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=264, PETRI_PLACES=77, PETRI_TRANSITIONS=54} [2023-08-29 22:43:02,721 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 12 predicate places. [2023-08-29 22:43:02,721 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 54 transitions, 264 flow [2023-08-29 22:43:02,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:02,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:43:02,722 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:43:02,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-29 22:43:02,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:43:02,936 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:43:02,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:43:02,937 INFO L85 PathProgramCache]: Analyzing trace with hash 656146441, now seen corresponding path program 1 times [2023-08-29 22:43:02,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:43:02,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141423779] [2023-08-29 22:43:02,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:43:02,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:43:02,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:43:02,938 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:43:02,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-29 22:43:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:43:03,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 22:43:03,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:43:03,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:43:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:43:03,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:43:03,560 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:43:03,560 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:43:03,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141423779] [2023-08-29 22:43:03,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141423779] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:43:03,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:43:03,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-29 22:43:03,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560732265] [2023-08-29 22:43:03,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:43:03,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:43:03,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:43:03,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:43:03,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:43:06,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 744 [2023-08-29 22:43:06,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 54 transitions, 264 flow. Second operand has 10 states, 10 states have (on average 301.4) internal successors, (3014), 10 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:06,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:43:06,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 744 [2023-08-29 22:43:06,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:43:08,515 INFO L130 PetriNetUnfolder]: 13349/19290 cut-off events. [2023-08-29 22:43:08,516 INFO L131 PetriNetUnfolder]: For 12360/12360 co-relation queries the response was YES. [2023-08-29 22:43:08,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49098 conditions, 19290 events. 13349/19290 cut-off events. For 12360/12360 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 109397 event pairs, 3193 based on Foata normal form. 798/15456 useless extension candidates. Maximal degree in co-relation 49077. Up to 5512 conditions per place. [2023-08-29 22:43:08,695 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 161 selfloop transitions, 7 changer transitions 0/168 dead transitions. [2023-08-29 22:43:08,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 168 transitions, 1048 flow [2023-08-29 22:43:08,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:43:08,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:43:08,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2526 transitions. [2023-08-29 22:43:08,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42439516129032256 [2023-08-29 22:43:08,698 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2526 transitions. [2023-08-29 22:43:08,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2526 transitions. [2023-08-29 22:43:08,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:43:08,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2526 transitions. [2023-08-29 22:43:08,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 315.75) internal successors, (2526), 8 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:08,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:08,703 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:08,703 INFO L175 Difference]: Start difference. First operand has 77 places, 54 transitions, 264 flow. Second operand 8 states and 2526 transitions. [2023-08-29 22:43:08,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 168 transitions, 1048 flow [2023-08-29 22:43:08,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 168 transitions, 1045 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:43:08,711 INFO L231 Difference]: Finished difference. Result has 85 places, 57 transitions, 301 flow [2023-08-29 22:43:08,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=301, PETRI_PLACES=85, PETRI_TRANSITIONS=57} [2023-08-29 22:43:08,711 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 20 predicate places. [2023-08-29 22:43:08,711 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 57 transitions, 301 flow [2023-08-29 22:43:08,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 301.4) internal successors, (3014), 10 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:08,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:43:08,712 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:43:08,722 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 (23)] Ended with exit code 0 [2023-08-29 22:43:08,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:43:08,914 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:43:08,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:43:08,914 INFO L85 PathProgramCache]: Analyzing trace with hash 655003940, now seen corresponding path program 1 times [2023-08-29 22:43:08,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:43:08,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136105413] [2023-08-29 22:43:08,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:43:08,915 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:43:08,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:43:08,915 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:43:08,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-29 22:43:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:43:09,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 22:43:09,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:43:09,443 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:43:09,444 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 42 [2023-08-29 22:43:09,520 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:43:09,521 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 [2023-08-29 22:43:09,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:43:09,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:43:09,598 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:43:09,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:43:09,633 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:43:09,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:43:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:43:09,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:43:09,686 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:43:09,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136105413] [2023-08-29 22:43:09,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136105413] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:43:09,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:43:09,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:43:09,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340362096] [2023-08-29 22:43:09,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:43:09,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:43:09,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:43:09,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:43:09,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:43:09,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 744 [2023-08-29 22:43:09,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 57 transitions, 301 flow. Second operand has 5 states, 5 states have (on average 296.8) internal successors, (1484), 5 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:09,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:43:09,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 744 [2023-08-29 22:43:09,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:43:13,137 INFO L130 PetriNetUnfolder]: 20429/29468 cut-off events. [2023-08-29 22:43:13,137 INFO L131 PetriNetUnfolder]: For 27517/27517 co-relation queries the response was YES. [2023-08-29 22:43:13,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79364 conditions, 29468 events. 20429/29468 cut-off events. For 27517/27517 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 180187 event pairs, 11813 based on Foata normal form. 0/21988 useless extension candidates. Maximal degree in co-relation 79340. Up to 19284 conditions per place. [2023-08-29 22:43:13,379 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 84 selfloop transitions, 4 changer transitions 0/88 dead transitions. [2023-08-29 22:43:13,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 88 transitions, 632 flow [2023-08-29 22:43:13,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:43:13,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:43:13,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1529 transitions. [2023-08-29 22:43:13,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4110215053763441 [2023-08-29 22:43:13,382 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1529 transitions. [2023-08-29 22:43:13,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1529 transitions. [2023-08-29 22:43:13,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:43:13,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1529 transitions. [2023-08-29 22:43:13,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 305.8) internal successors, (1529), 5 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:13,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:13,386 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:13,386 INFO L175 Difference]: Start difference. First operand has 85 places, 57 transitions, 301 flow. Second operand 5 states and 1529 transitions. [2023-08-29 22:43:13,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 88 transitions, 632 flow [2023-08-29 22:43:13,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 88 transitions, 613 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-29 22:43:13,419 INFO L231 Difference]: Finished difference. Result has 87 places, 58 transitions, 306 flow [2023-08-29 22:43:13,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=306, PETRI_PLACES=87, PETRI_TRANSITIONS=58} [2023-08-29 22:43:13,419 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 22 predicate places. [2023-08-29 22:43:13,419 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 58 transitions, 306 flow [2023-08-29 22:43:13,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 296.8) internal successors, (1484), 5 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:13,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:43:13,420 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:43:13,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-29 22:43:13,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:43:13,627 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:43:13,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:43:13,627 INFO L85 PathProgramCache]: Analyzing trace with hash 655004069, now seen corresponding path program 1 times [2023-08-29 22:43:13,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:43:13,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [759946170] [2023-08-29 22:43:13,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:43:13,628 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:43:13,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:43:13,629 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:43:13,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-29 22:43:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:43:14,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:43:14,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:43:14,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:43:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:43:14,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:43:14,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:43:14,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [759946170] [2023-08-29 22:43:14,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [759946170] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:43:14,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:43:14,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:43:14,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964508682] [2023-08-29 22:43:14,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:43:14,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:43:14,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:43:14,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:43:14,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:43:14,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 744 [2023-08-29 22:43:14,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 58 transitions, 306 flow. Second operand has 5 states, 5 states have (on average 302.8) internal successors, (1514), 5 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:14,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:43:14,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 744 [2023-08-29 22:43:14,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:43:17,179 INFO L130 PetriNetUnfolder]: 18069/26092 cut-off events. [2023-08-29 22:43:17,179 INFO L131 PetriNetUnfolder]: For 24530/24530 co-relation queries the response was YES. [2023-08-29 22:43:17,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74024 conditions, 26092 events. 18069/26092 cut-off events. For 24530/24530 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 156219 event pairs, 11813 based on Foata normal form. 0/21932 useless extension candidates. Maximal degree in co-relation 73999. Up to 19272 conditions per place. [2023-08-29 22:43:17,442 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 83 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2023-08-29 22:43:17,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 87 transitions, 623 flow [2023-08-29 22:43:17,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:43:17,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:43:17,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1558 transitions. [2023-08-29 22:43:17,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4188172043010753 [2023-08-29 22:43:17,444 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1558 transitions. [2023-08-29 22:43:17,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1558 transitions. [2023-08-29 22:43:17,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:43:17,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1558 transitions. [2023-08-29 22:43:17,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 311.6) internal successors, (1558), 5 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:17,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:17,448 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:17,448 INFO L175 Difference]: Start difference. First operand has 87 places, 58 transitions, 306 flow. Second operand 5 states and 1558 transitions. [2023-08-29 22:43:17,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 87 transitions, 623 flow [2023-08-29 22:43:17,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 617 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:43:17,475 INFO L231 Difference]: Finished difference. Result has 89 places, 58 transitions, 312 flow [2023-08-29 22:43:17,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=89, PETRI_TRANSITIONS=58} [2023-08-29 22:43:17,476 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 24 predicate places. [2023-08-29 22:43:17,476 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 58 transitions, 312 flow [2023-08-29 22:43:17,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 302.8) internal successors, (1514), 5 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:17,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:43:17,476 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:43:17,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-29 22:43:17,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:43:17,677 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:43:17,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:43:17,677 INFO L85 PathProgramCache]: Analyzing trace with hash 656146374, now seen corresponding path program 1 times [2023-08-29 22:43:17,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:43:17,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583996972] [2023-08-29 22:43:17,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:43:17,678 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:43:17,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:43:17,679 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:43:17,679 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 (26)] Waiting until timeout for monitored process [2023-08-29 22:43:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:43:18,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 22:43:18,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:43:18,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:43:18,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:43:18,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:43:18,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:43:18,199 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:43:18,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:43:18,264 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:43:18,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:43:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:43:20,635 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:43:20,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583996972] [2023-08-29 22:43:20,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583996972] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:43:20,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:43:20,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-29 22:43:20,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413906642] [2023-08-29 22:43:20,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:43:20,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:43:20,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:43:20,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:43:20,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:43:22,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:25,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:29,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 744 [2023-08-29 22:43:29,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 58 transitions, 312 flow. Second operand has 10 states, 10 states have (on average 294.6) internal successors, (2946), 10 states have internal predecessors, (2946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:29,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:43:29,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 744 [2023-08-29 22:43:29,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:43:31,952 INFO L130 PetriNetUnfolder]: 15543/22492 cut-off events. [2023-08-29 22:43:31,952 INFO L131 PetriNetUnfolder]: For 29433/29433 co-relation queries the response was YES. [2023-08-29 22:43:32,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66345 conditions, 22492 events. 15543/22492 cut-off events. For 29433/29433 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 130606 event pairs, 2857 based on Foata normal form. 1074/20608 useless extension candidates. Maximal degree in co-relation 66319. Up to 6160 conditions per place. [2023-08-29 22:43:32,226 INFO L137 encePairwiseOnDemand]: 737/744 looper letters, 160 selfloop transitions, 10 changer transitions 0/170 dead transitions. [2023-08-29 22:43:32,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 170 transitions, 1148 flow [2023-08-29 22:43:32,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:43:32,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:43:32,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2466 transitions. [2023-08-29 22:43:32,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41431451612903225 [2023-08-29 22:43:32,229 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2466 transitions. [2023-08-29 22:43:32,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2466 transitions. [2023-08-29 22:43:32,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:43:32,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2466 transitions. [2023-08-29 22:43:32,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 308.25) internal successors, (2466), 8 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:32,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:32,237 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:32,237 INFO L175 Difference]: Start difference. First operand has 89 places, 58 transitions, 312 flow. Second operand 8 states and 2466 transitions. [2023-08-29 22:43:32,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 170 transitions, 1148 flow [2023-08-29 22:43:32,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 170 transitions, 1124 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 22:43:32,496 INFO L231 Difference]: Finished difference. Result has 96 places, 59 transitions, 349 flow [2023-08-29 22:43:32,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=349, PETRI_PLACES=96, PETRI_TRANSITIONS=59} [2023-08-29 22:43:32,496 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 31 predicate places. [2023-08-29 22:43:32,496 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 59 transitions, 349 flow [2023-08-29 22:43:32,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 294.6) internal successors, (2946), 10 states have internal predecessors, (2946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:32,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:43:32,497 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:43:32,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-29 22:43:32,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:43:32,713 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:43:32,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:43:32,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1169704373, now seen corresponding path program 1 times [2023-08-29 22:43:32,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:43:32,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818590436] [2023-08-29 22:43:32,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:43:32,713 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:43:32,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:43:32,714 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) [2023-08-29 22:43:32,715 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 [2023-08-29 22:43:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:43:33,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 22:43:33,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:43:33,312 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:43:33,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 22:43:33,380 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:43:33,381 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 42 [2023-08-29 22:43:33,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:43:33,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:43:33,445 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:43:33,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:43:33,490 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:43:33,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:43:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:43:33,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:43:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:43:36,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:43:36,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818590436] [2023-08-29 22:43:36,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818590436] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:43:36,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:43:36,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-08-29 22:43:36,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11840035] [2023-08-29 22:43:36,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:43:36,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 22:43:36,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:43:36,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 22:43:36,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-29 22:43:38,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:40,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:43:43,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 744 [2023-08-29 22:43:43,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 59 transitions, 349 flow. Second operand has 11 states, 11 states have (on average 294.72727272727275) internal successors, (3242), 11 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:43,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:43:43,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 744 [2023-08-29 22:43:43,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:43:49,490 INFO L130 PetriNetUnfolder]: 32661/46784 cut-off events. [2023-08-29 22:43:49,490 INFO L131 PetriNetUnfolder]: For 88535/88535 co-relation queries the response was YES. [2023-08-29 22:43:49,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148449 conditions, 46784 events. 32661/46784 cut-off events. For 88535/88535 co-relation queries the response was YES. Maximal size of possible extension queue 1101. Compared 297842 event pairs, 8173 based on Foata normal form. 0/45328 useless extension candidates. Maximal degree in co-relation 148419. Up to 13712 conditions per place. [2023-08-29 22:43:50,061 INFO L137 encePairwiseOnDemand]: 738/744 looper letters, 177 selfloop transitions, 8 changer transitions 0/185 dead transitions. [2023-08-29 22:43:50,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 185 transitions, 1475 flow [2023-08-29 22:43:50,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:43:50,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:43:50,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2462 transitions. [2023-08-29 22:43:50,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41364247311827956 [2023-08-29 22:43:50,065 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2462 transitions. [2023-08-29 22:43:50,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2462 transitions. [2023-08-29 22:43:50,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:43:50,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2462 transitions. [2023-08-29 22:43:50,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 307.75) internal successors, (2462), 8 states have internal predecessors, (2462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:50,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:50,072 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:50,072 INFO L175 Difference]: Start difference. First operand has 96 places, 59 transitions, 349 flow. Second operand 8 states and 2462 transitions. [2023-08-29 22:43:50,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 185 transitions, 1475 flow [2023-08-29 22:43:50,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 185 transitions, 1352 flow, removed 25 selfloop flow, removed 9 redundant places. [2023-08-29 22:43:50,139 INFO L231 Difference]: Finished difference. Result has 98 places, 63 transitions, 375 flow [2023-08-29 22:43:50,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=375, PETRI_PLACES=98, PETRI_TRANSITIONS=63} [2023-08-29 22:43:50,139 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 33 predicate places. [2023-08-29 22:43:50,139 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 63 transitions, 375 flow [2023-08-29 22:43:50,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 294.72727272727275) internal successors, (3242), 11 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:50,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:43:50,140 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:43:50,151 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 [2023-08-29 22:43:50,340 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 [2023-08-29 22:43:50,341 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:43:50,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:43:50,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1169704244, now seen corresponding path program 1 times [2023-08-29 22:43:50,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:43:50,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1937999138] [2023-08-29 22:43:50,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:43:50,341 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:43:50,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:43:50,342 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) [2023-08-29 22:43:50,345 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 [2023-08-29 22:43:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:43:50,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 22:43:50,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:43:50,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:43:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:43:50,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:43:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:43:51,010 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:43:51,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1937999138] [2023-08-29 22:43:51,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1937999138] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:43:51,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:43:51,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-29 22:43:51,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660663920] [2023-08-29 22:43:51,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:43:51,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:43:51,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:43:51,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:43:51,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:43:53,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 744 [2023-08-29 22:43:53,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 63 transitions, 375 flow. Second operand has 10 states, 10 states have (on average 301.6) internal successors, (3016), 10 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:53,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:43:53,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 744 [2023-08-29 22:43:53,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:43:59,508 INFO L130 PetriNetUnfolder]: 27723/40090 cut-off events. [2023-08-29 22:43:59,508 INFO L131 PetriNetUnfolder]: For 66947/66947 co-relation queries the response was YES. [2023-08-29 22:43:59,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132458 conditions, 40090 events. 27723/40090 cut-off events. For 66947/66947 co-relation queries the response was YES. Maximal size of possible extension queue 940. Compared 253445 event pairs, 10121 based on Foata normal form. 2634/41584 useless extension candidates. Maximal degree in co-relation 132428. Up to 16608 conditions per place. [2023-08-29 22:43:59,947 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 175 selfloop transitions, 7 changer transitions 0/182 dead transitions. [2023-08-29 22:43:59,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 182 transitions, 1369 flow [2023-08-29 22:43:59,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:43:59,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:43:59,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2515 transitions. [2023-08-29 22:43:59,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4225470430107527 [2023-08-29 22:43:59,950 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2515 transitions. [2023-08-29 22:43:59,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2515 transitions. [2023-08-29 22:43:59,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:43:59,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2515 transitions. [2023-08-29 22:43:59,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 314.375) internal successors, (2515), 8 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:59,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:59,955 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:59,955 INFO L175 Difference]: Start difference. First operand has 98 places, 63 transitions, 375 flow. Second operand 8 states and 2515 transitions. [2023-08-29 22:43:59,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 182 transitions, 1369 flow [2023-08-29 22:44:00,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 182 transitions, 1350 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-08-29 22:44:00,355 INFO L231 Difference]: Finished difference. Result has 100 places, 62 transitions, 364 flow [2023-08-29 22:44:00,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=364, PETRI_PLACES=100, PETRI_TRANSITIONS=62} [2023-08-29 22:44:00,355 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 35 predicate places. [2023-08-29 22:44:00,356 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 62 transitions, 364 flow [2023-08-29 22:44:00,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 301.6) internal successors, (3016), 10 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:00,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:44:00,356 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:44:00,366 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 [2023-08-29 22:44:00,556 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 [2023-08-29 22:44:00,557 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:44:00,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:44:00,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1059227270, now seen corresponding path program 2 times [2023-08-29 22:44:00,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:44:00,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707789617] [2023-08-29 22:44:00,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:44:00,558 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:44:00,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:44:00,558 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) [2023-08-29 22:44:00,559 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 [2023-08-29 22:44:01,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:44:01,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:44:01,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 22:44:01,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:44:01,117 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:44:01,117 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 42 [2023-08-29 22:44:01,194 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:44:01,194 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 [2023-08-29 22:44:01,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:44:01,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:44:01,269 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:44:01,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:44:01,308 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:44:01,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:44:01,429 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:44:01,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:44:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:44:06,740 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:44:06,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707789617] [2023-08-29 22:44:06,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1707789617] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:44:06,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:44:06,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2023-08-29 22:44:06,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286038536] [2023-08-29 22:44:06,741 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:44:06,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 22:44:06,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:44:06,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 22:44:06,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=206, Unknown=1, NotChecked=0, Total=272 [2023-08-29 22:44:10,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:44:13,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:44:15,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:44:17,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:44:20,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:44:22,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:44:25,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:44:28,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:44:31,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:44:36,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:44:38,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:44:40,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 744 [2023-08-29 22:44:40,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 62 transitions, 364 flow. Second operand has 17 states, 17 states have (on average 287.11764705882354) internal successors, (4881), 17 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:40,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:44:40,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 744 [2023-08-29 22:44:40,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:44:47,954 INFO L130 PetriNetUnfolder]: 33765/48804 cut-off events. [2023-08-29 22:44:47,955 INFO L131 PetriNetUnfolder]: For 89823/89823 co-relation queries the response was YES. [2023-08-29 22:44:48,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158585 conditions, 48804 events. 33765/48804 cut-off events. For 89823/89823 co-relation queries the response was YES. Maximal size of possible extension queue 1104. Compared 316627 event pairs, 5209 based on Foata normal form. 506/47526 useless extension candidates. Maximal degree in co-relation 158557. Up to 8728 conditions per place. [2023-08-29 22:44:48,445 INFO L137 encePairwiseOnDemand]: 737/744 looper letters, 242 selfloop transitions, 11 changer transitions 0/253 dead transitions. [2023-08-29 22:44:48,445 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 253 transitions, 1845 flow [2023-08-29 22:44:48,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 22:44:48,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 22:44:48,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3029 transitions. [2023-08-29 22:44:48,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4071236559139785 [2023-08-29 22:44:48,449 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3029 transitions. [2023-08-29 22:44:48,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3029 transitions. [2023-08-29 22:44:48,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:44:48,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3029 transitions. [2023-08-29 22:44:48,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 302.9) internal successors, (3029), 10 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:48,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 744.0) internal successors, (8184), 11 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:48,458 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 744.0) internal successors, (8184), 11 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:48,458 INFO L175 Difference]: Start difference. First operand has 100 places, 62 transitions, 364 flow. Second operand 10 states and 3029 transitions. [2023-08-29 22:44:48,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 253 transitions, 1845 flow [2023-08-29 22:44:48,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 253 transitions, 1764 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-29 22:44:48,639 INFO L231 Difference]: Finished difference. Result has 104 places, 65 transitions, 405 flow [2023-08-29 22:44:48,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=405, PETRI_PLACES=104, PETRI_TRANSITIONS=65} [2023-08-29 22:44:48,639 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 39 predicate places. [2023-08-29 22:44:48,639 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 65 transitions, 405 flow [2023-08-29 22:44:48,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 287.11764705882354) internal successors, (4881), 17 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:48,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:44:48,640 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:44:48,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2023-08-29 22:44:48,857 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 [2023-08-29 22:44:48,857 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:44:48,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:44:48,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1059227334, now seen corresponding path program 2 times [2023-08-29 22:44:48,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:44:48,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065552035] [2023-08-29 22:44:48,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:44:48,858 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:44:48,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:44:48,859 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) [2023-08-29 22:44:48,862 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 (30)] Waiting until timeout for monitored process [2023-08-29 22:44:49,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 22:44:49,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:44:49,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-29 22:44:49,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:44:49,279 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:44:49,279 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 [2023-08-29 22:44:49,354 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:44:49,354 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 42 [2023-08-29 22:44:49,418 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:44:49,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:44:49,437 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 22:44:49,438 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 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 22:44:49,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:44:49,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:44:49,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2023-08-29 22:44:49,578 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-08-29 22:44:49,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-08-29 22:44:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-08-29 22:44:50,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:44:50,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:44:50,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065552035] [2023-08-29 22:44:50,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065552035] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:44:50,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:44:50,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:44:50,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695027905] [2023-08-29 22:44:50,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:44:50,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:44:50,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:44:50,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:44:50,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:44:50,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 744 [2023-08-29 22:44:50,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 65 transitions, 405 flow. Second operand has 5 states, 5 states have (on average 295.4) internal successors, (1477), 5 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:50,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:44:50,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 744 [2023-08-29 22:44:50,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:44:56,673 INFO L130 PetriNetUnfolder]: 31277/45304 cut-off events. [2023-08-29 22:44:56,673 INFO L131 PetriNetUnfolder]: For 73393/73393 co-relation queries the response was YES. [2023-08-29 22:44:57,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147103 conditions, 45304 events. 31277/45304 cut-off events. For 73393/73393 co-relation queries the response was YES. Maximal size of possible extension queue 1008. Compared 285088 event pairs, 29059 based on Foata normal form. 0/44588 useless extension candidates. Maximal degree in co-relation 147073. Up to 45292 conditions per place. [2023-08-29 22:44:57,174 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 60 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2023-08-29 22:44:57,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 63 transitions, 514 flow [2023-08-29 22:44:57,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:44:57,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:44:57,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1501 transitions. [2023-08-29 22:44:57,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403494623655914 [2023-08-29 22:44:57,177 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1501 transitions. [2023-08-29 22:44:57,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1501 transitions. [2023-08-29 22:44:57,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:44:57,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1501 transitions. [2023-08-29 22:44:57,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 300.2) internal successors, (1501), 5 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:57,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:57,181 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:57,181 INFO L175 Difference]: Start difference. First operand has 104 places, 65 transitions, 405 flow. Second operand 5 states and 1501 transitions. [2023-08-29 22:44:57,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 63 transitions, 514 flow [2023-08-29 22:44:57,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 63 transitions, 497 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-29 22:44:57,326 INFO L231 Difference]: Finished difference. Result has 100 places, 63 transitions, 377 flow [2023-08-29 22:44:57,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=377, PETRI_PLACES=100, PETRI_TRANSITIONS=63} [2023-08-29 22:44:57,327 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 35 predicate places. [2023-08-29 22:44:57,327 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 63 transitions, 377 flow [2023-08-29 22:44:57,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 295.4) internal successors, (1477), 5 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:57,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:44:57,328 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:44:57,335 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 (30)] Forceful destruction successful, exit code 0 [2023-08-29 22:44:57,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:44:57,529 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:44:57,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:44:57,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1583406235, now seen corresponding path program 2 times [2023-08-29 22:44:57,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:44:57,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631797710] [2023-08-29 22:44:57,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:44:57,531 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:44:57,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:44:57,531 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:44:57,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-08-29 22:44:57,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 22:44:57,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:44:57,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-29 22:44:57,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:44:57,853 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:44:57,853 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 42 [2023-08-29 22:44:57,931 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:44:57,931 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 [2023-08-29 22:44:58,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:44:58,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:44:58,013 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:44:58,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:44:58,051 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:44:58,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:44:58,367 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 22:44:58,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:44:58,368 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:44:58,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631797710] [2023-08-29 22:44:58,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631797710] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:44:58,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:44:58,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:44:58,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720760194] [2023-08-29 22:44:58,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:44:58,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:44:58,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:44:58,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:44:58,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:44:58,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 744 [2023-08-29 22:44:58,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 63 transitions, 377 flow. Second operand has 6 states, 6 states have (on average 294.5) internal successors, (1767), 6 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:58,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:44:58,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 744 [2023-08-29 22:44:58,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:45:04,345 INFO L130 PetriNetUnfolder]: 28985/42016 cut-off events. [2023-08-29 22:45:04,346 INFO L131 PetriNetUnfolder]: For 59219/59219 co-relation queries the response was YES. [2023-08-29 22:45:04,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134286 conditions, 42016 events. 28985/42016 cut-off events. For 59219/59219 co-relation queries the response was YES. Maximal size of possible extension queue 938. Compared 262594 event pairs, 26855 based on Foata normal form. 996/42348 useless extension candidates. Maximal degree in co-relation 134257. Up to 41998 conditions per place. [2023-08-29 22:45:04,798 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 59 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2023-08-29 22:45:04,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 62 transitions, 497 flow [2023-08-29 22:45:04,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:45:04,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:45:04,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1495 transitions. [2023-08-29 22:45:04,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4018817204301075 [2023-08-29 22:45:04,800 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1495 transitions. [2023-08-29 22:45:04,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1495 transitions. [2023-08-29 22:45:04,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:45:04,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1495 transitions. [2023-08-29 22:45:04,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:04,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:04,804 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:04,805 INFO L175 Difference]: Start difference. First operand has 100 places, 63 transitions, 377 flow. Second operand 5 states and 1495 transitions. [2023-08-29 22:45:04,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 62 transitions, 497 flow [2023-08-29 22:45:04,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 62 transitions, 492 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:45:04,943 INFO L231 Difference]: Finished difference. Result has 100 places, 62 transitions, 374 flow [2023-08-29 22:45:04,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=374, PETRI_PLACES=100, PETRI_TRANSITIONS=62} [2023-08-29 22:45:04,943 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 35 predicate places. [2023-08-29 22:45:04,944 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 62 transitions, 374 flow [2023-08-29 22:45:04,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 294.5) internal successors, (1767), 6 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:04,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:45:04,944 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:45:04,951 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 (31)] Ended with exit code 0 [2023-08-29 22:45:05,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:45:05,145 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:45:05,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:45:05,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1583406364, now seen corresponding path program 2 times [2023-08-29 22:45:05,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:45:05,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [930305497] [2023-08-29 22:45:05,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:45:05,146 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:45:05,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:45:05,147 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:45:05,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-08-29 22:45:05,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:45:05,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:45:05,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 22:45:05,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:45:05,701 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:45:05,701 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 [2023-08-29 22:45:05,774 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:45:05,774 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 42 [2023-08-29 22:45:05,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:45:05,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:45:05,839 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:45:05,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:45:06,028 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:45:06,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:45:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:45:06,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:45:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:45:08,930 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:45:08,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [930305497] [2023-08-29 22:45:08,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [930305497] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:45:08,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:45:08,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2023-08-29 22:45:08,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493771586] [2023-08-29 22:45:08,930 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:45:08,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 22:45:08,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:45:08,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 22:45:08,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2023-08-29 22:45:12,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:45:14,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:45:19,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:45:23,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 744 [2023-08-29 22:45:23,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 62 transitions, 374 flow. Second operand has 17 states, 17 states have (on average 293.11764705882354) internal successors, (4983), 17 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:23,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:45:23,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 744 [2023-08-29 22:45:23,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:45:31,293 INFO L130 PetriNetUnfolder]: 33569/48652 cut-off events. [2023-08-29 22:45:31,293 INFO L131 PetriNetUnfolder]: For 85432/85432 co-relation queries the response was YES. [2023-08-29 22:45:31,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154951 conditions, 48652 events. 33569/48652 cut-off events. For 85432/85432 co-relation queries the response was YES. Maximal size of possible extension queue 1061. Compared 314593 event pairs, 9223 based on Foata normal form. 996/48880 useless extension candidates. Maximal degree in co-relation 154922. Up to 15466 conditions per place. [2023-08-29 22:45:31,825 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 210 selfloop transitions, 8 changer transitions 0/218 dead transitions. [2023-08-29 22:45:31,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 218 transitions, 1711 flow [2023-08-29 22:45:31,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:45:31,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:45:31,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2754 transitions. [2023-08-29 22:45:31,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112903225806452 [2023-08-29 22:45:31,828 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2754 transitions. [2023-08-29 22:45:31,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2754 transitions. [2023-08-29 22:45:31,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:45:31,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2754 transitions. [2023-08-29 22:45:31,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 306.0) internal successors, (2754), 9 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:31,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 744.0) internal successors, (7440), 10 states have internal predecessors, (7440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:31,835 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 744.0) internal successors, (7440), 10 states have internal predecessors, (7440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:31,836 INFO L175 Difference]: Start difference. First operand has 100 places, 62 transitions, 374 flow. Second operand 9 states and 2754 transitions. [2023-08-29 22:45:31,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 218 transitions, 1711 flow [2023-08-29 22:45:32,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 218 transitions, 1706 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:45:32,314 INFO L231 Difference]: Finished difference. Result has 106 places, 63 transitions, 397 flow [2023-08-29 22:45:32,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=397, PETRI_PLACES=106, PETRI_TRANSITIONS=63} [2023-08-29 22:45:32,314 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 41 predicate places. [2023-08-29 22:45:32,314 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 63 transitions, 397 flow [2023-08-29 22:45:32,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 293.11764705882354) internal successors, (4983), 17 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:32,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:45:32,315 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:45:32,333 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 (32)] Forceful destruction successful, exit code 0 [2023-08-29 22:45:32,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:45:32,529 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:45:32,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:45:32,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1840947061, now seen corresponding path program 3 times [2023-08-29 22:45:32,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:45:32,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204917104] [2023-08-29 22:45:32,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:45:32,530 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:45:32,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:45:32,531 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:45:32,532 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 (33)] Waiting until timeout for monitored process [2023-08-29 22:45:33,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-29 22:45:33,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:45:33,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:45:33,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:45:33,279 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:45:33,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:45:33,370 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:45:33,370 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:45:33,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204917104] [2023-08-29 22:45:33,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204917104] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:45:33,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:45:33,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-29 22:45:33,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734121674] [2023-08-29 22:45:33,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:45:33,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 22:45:33,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:45:33,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 22:45:33,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-29 22:45:33,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 744 [2023-08-29 22:45:33,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 63 transitions, 397 flow. Second operand has 14 states, 14 states have (on average 315.85714285714283) internal successors, (4422), 14 states have internal predecessors, (4422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:33,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:45:33,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 744 [2023-08-29 22:45:33,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:45:40,319 INFO L130 PetriNetUnfolder]: 30281/44368 cut-off events. [2023-08-29 22:45:40,319 INFO L131 PetriNetUnfolder]: For 75778/75778 co-relation queries the response was YES. [2023-08-29 22:45:40,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144680 conditions, 44368 events. 30281/44368 cut-off events. For 75778/75778 co-relation queries the response was YES. Maximal size of possible extension queue 999. Compared 291078 event pairs, 2611 based on Foata normal form. 1992/45644 useless extension candidates. Maximal degree in co-relation 144650. Up to 6636 conditions per place. [2023-08-29 22:45:40,856 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 238 selfloop transitions, 6 changer transitions 0/244 dead transitions. [2023-08-29 22:45:40,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 244 transitions, 1932 flow [2023-08-29 22:45:40,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:45:40,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:45:40,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2662 transitions. [2023-08-29 22:45:40,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.447244623655914 [2023-08-29 22:45:40,859 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2662 transitions. [2023-08-29 22:45:40,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2662 transitions. [2023-08-29 22:45:40,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:45:40,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2662 transitions. [2023-08-29 22:45:40,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 332.75) internal successors, (2662), 8 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:40,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:40,864 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:40,864 INFO L175 Difference]: Start difference. First operand has 106 places, 63 transitions, 397 flow. Second operand 8 states and 2662 transitions. [2023-08-29 22:45:40,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 244 transitions, 1932 flow [2023-08-29 22:45:41,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 244 transitions, 1901 flow, removed 2 selfloop flow, removed 13 redundant places. [2023-08-29 22:45:41,514 INFO L231 Difference]: Finished difference. Result has 99 places, 61 transitions, 358 flow [2023-08-29 22:45:41,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=358, PETRI_PLACES=99, PETRI_TRANSITIONS=61} [2023-08-29 22:45:41,515 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 34 predicate places. [2023-08-29 22:45:41,515 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 61 transitions, 358 flow [2023-08-29 22:45:41,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 315.85714285714283) internal successors, (4422), 14 states have internal predecessors, (4422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:41,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:45:41,516 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:45:41,530 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 (33)] Forceful destruction successful, exit code 0 [2023-08-29 22:45:41,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:45:41,724 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:45:41,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:45:41,724 INFO L85 PathProgramCache]: Analyzing trace with hash 10263789, now seen corresponding path program 3 times [2023-08-29 22:45:41,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:45:41,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706049561] [2023-08-29 22:45:41,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:45:41,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:45:41,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:45:41,726 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:45:41,727 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 (34)] Waiting until timeout for monitored process [2023-08-29 22:45:42,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-29 22:45:42,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:45:42,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:45:42,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:45:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:45:42,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:45:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:45:42,952 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:45:42,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706049561] [2023-08-29 22:45:42,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706049561] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:45:42,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:45:42,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-29 22:45:42,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329637217] [2023-08-29 22:45:42,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:45:42,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 22:45:42,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:45:42,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 22:45:42,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-29 22:45:43,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 744 [2023-08-29 22:45:43,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 61 transitions, 358 flow. Second operand has 14 states, 14 states have (on average 316.2857142857143) internal successors, (4428), 14 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:43,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:45:43,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 744 [2023-08-29 22:45:43,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:45:49,597 INFO L130 PetriNetUnfolder]: 27359/40434 cut-off events. [2023-08-29 22:45:49,597 INFO L131 PetriNetUnfolder]: For 50522/50522 co-relation queries the response was YES. [2023-08-29 22:45:49,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121418 conditions, 40434 events. 27359/40434 cut-off events. For 50522/50522 co-relation queries the response was YES. Maximal size of possible extension queue 956. Compared 267920 event pairs, 675 based on Foata normal form. 1012/40786 useless extension candidates. Maximal degree in co-relation 121393. Up to 6820 conditions per place. [2023-08-29 22:45:50,019 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 228 selfloop transitions, 6 changer transitions 0/234 dead transitions. [2023-08-29 22:45:50,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 234 transitions, 1601 flow [2023-08-29 22:45:50,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:45:50,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:45:50,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2673 transitions. [2023-08-29 22:45:50,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4490927419354839 [2023-08-29 22:45:50,021 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2673 transitions. [2023-08-29 22:45:50,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2673 transitions. [2023-08-29 22:45:50,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:45:50,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2673 transitions. [2023-08-29 22:45:50,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 334.125) internal successors, (2673), 8 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:50,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:50,028 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:50,028 INFO L175 Difference]: Start difference. First operand has 99 places, 61 transitions, 358 flow. Second operand 8 states and 2673 transitions. [2023-08-29 22:45:50,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 234 transitions, 1601 flow [2023-08-29 22:45:50,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 234 transitions, 1509 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-29 22:45:50,188 INFO L231 Difference]: Finished difference. Result has 92 places, 58 transitions, 314 flow [2023-08-29 22:45:50,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=314, PETRI_PLACES=92, PETRI_TRANSITIONS=58} [2023-08-29 22:45:50,188 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 27 predicate places. [2023-08-29 22:45:50,188 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 58 transitions, 314 flow [2023-08-29 22:45:50,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 316.2857142857143) internal successors, (4428), 14 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:50,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:45:50,189 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:45:50,204 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 (34)] Forceful destruction successful, exit code 0 [2023-08-29 22:45:50,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:45:50,390 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:45:50,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:45:50,390 INFO L85 PathProgramCache]: Analyzing trace with hash 459104922, now seen corresponding path program 2 times [2023-08-29 22:45:50,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:45:50,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860548865] [2023-08-29 22:45:50,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:45:50,390 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:45:50,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:45:50,391 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:45:50,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2023-08-29 22:45:50,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:45:50,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:45:50,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 22:45:50,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:45:50,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:45:50,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:45:50,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:45:50,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:45:50,921 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:45:50,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:45:51,048 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:45:51,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:45:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:45:51,731 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:45:51,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860548865] [2023-08-29 22:45:51,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860548865] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:45:51,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:45:51,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-08-29 22:45:51,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494546049] [2023-08-29 22:45:51,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:45:51,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 22:45:51,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:45:51,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 22:45:51,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-08-29 22:45:58,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 744 [2023-08-29 22:45:58,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 58 transitions, 314 flow. Second operand has 16 states, 16 states have (on average 295.375) internal successors, (4726), 16 states have internal predecessors, (4726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:58,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:45:58,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 744 [2023-08-29 22:45:58,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:46:05,604 INFO L130 PetriNetUnfolder]: 33415/49358 cut-off events. [2023-08-29 22:46:05,604 INFO L131 PetriNetUnfolder]: For 50160/50160 co-relation queries the response was YES. [2023-08-29 22:46:06,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142626 conditions, 49358 events. 33415/49358 cut-off events. For 50160/50160 co-relation queries the response was YES. Maximal size of possible extension queue 1051. Compared 326611 event pairs, 5431 based on Foata normal form. 660/48698 useless extension candidates. Maximal degree in co-relation 142606. Up to 9002 conditions per place. [2023-08-29 22:46:06,147 INFO L137 encePairwiseOnDemand]: 737/744 looper letters, 204 selfloop transitions, 11 changer transitions 0/215 dead transitions. [2023-08-29 22:46:06,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 215 transitions, 1406 flow [2023-08-29 22:46:06,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 22:46:06,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 22:46:06,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3071 transitions. [2023-08-29 22:46:06,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127688172043011 [2023-08-29 22:46:06,151 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3071 transitions. [2023-08-29 22:46:06,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3071 transitions. [2023-08-29 22:46:06,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:46:06,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3071 transitions. [2023-08-29 22:46:06,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 307.1) internal successors, (3071), 10 states have internal predecessors, (3071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:06,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 744.0) internal successors, (8184), 11 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:06,159 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 744.0) internal successors, (8184), 11 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:06,159 INFO L175 Difference]: Start difference. First operand has 92 places, 58 transitions, 314 flow. Second operand 10 states and 3071 transitions. [2023-08-29 22:46:06,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 215 transitions, 1406 flow [2023-08-29 22:46:06,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 215 transitions, 1329 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 22:46:06,560 INFO L231 Difference]: Finished difference. Result has 97 places, 61 transitions, 359 flow [2023-08-29 22:46:06,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=359, PETRI_PLACES=97, PETRI_TRANSITIONS=61} [2023-08-29 22:46:06,561 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 32 predicate places. [2023-08-29 22:46:06,561 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 61 transitions, 359 flow [2023-08-29 22:46:06,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 295.375) internal successors, (4726), 16 states have internal predecessors, (4726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:06,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:46:06,562 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:46:06,574 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 (35)] Forceful destruction successful, exit code 0 [2023-08-29 22:46:06,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:46:06,762 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:46:06,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:46:06,763 INFO L85 PathProgramCache]: Analyzing trace with hash 459104989, now seen corresponding path program 2 times [2023-08-29 22:46:06,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:46:06,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711177664] [2023-08-29 22:46:06,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:46:06,763 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:46:06,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:46:06,764 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:46:06,766 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 (36)] Waiting until timeout for monitored process [2023-08-29 22:46:07,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 22:46:07,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:46:07,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-29 22:46:07,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:46:07,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:46:07,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:46:07,103 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:46:07,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:46:07,118 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:46:07,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:46:07,356 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-08-29 22:46:07,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:46:07,356 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:46:07,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711177664] [2023-08-29 22:46:07,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711177664] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:46:07,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:46:07,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:46:07,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551292625] [2023-08-29 22:46:07,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:46:07,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:46:07,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:46:07,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:46:07,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:46:07,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 744 [2023-08-29 22:46:07,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 61 transitions, 359 flow. Second operand has 5 states, 5 states have (on average 294.8) internal successors, (1474), 5 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:07,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:46:07,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 744 [2023-08-29 22:46:07,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:46:13,544 INFO L130 PetriNetUnfolder]: 30459/45082 cut-off events. [2023-08-29 22:46:13,544 INFO L131 PetriNetUnfolder]: For 44152/44152 co-relation queries the response was YES. [2023-08-29 22:46:13,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135308 conditions, 45082 events. 30459/45082 cut-off events. For 44152/44152 co-relation queries the response was YES. Maximal size of possible extension queue 969. Compared 296023 event pairs, 29799 based on Foata normal form. 0/45082 useless extension candidates. Maximal degree in co-relation 135286. Up to 45064 conditions per place. [2023-08-29 22:46:14,031 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 56 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2023-08-29 22:46:14,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 59 transitions, 460 flow [2023-08-29 22:46:14,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:46:14,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:46:14,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1492 transitions. [2023-08-29 22:46:14,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010752688172043 [2023-08-29 22:46:14,033 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1492 transitions. [2023-08-29 22:46:14,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1492 transitions. [2023-08-29 22:46:14,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:46:14,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1492 transitions. [2023-08-29 22:46:14,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 298.4) internal successors, (1492), 5 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:14,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:14,036 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:14,036 INFO L175 Difference]: Start difference. First operand has 97 places, 61 transitions, 359 flow. Second operand 5 states and 1492 transitions. [2023-08-29 22:46:14,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 59 transitions, 460 flow [2023-08-29 22:46:14,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 59 transitions, 442 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-29 22:46:14,158 INFO L231 Difference]: Finished difference. Result has 93 places, 59 transitions, 330 flow [2023-08-29 22:46:14,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=330, PETRI_PLACES=93, PETRI_TRANSITIONS=59} [2023-08-29 22:46:14,158 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 28 predicate places. [2023-08-29 22:46:14,158 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 59 transitions, 330 flow [2023-08-29 22:46:14,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 294.8) internal successors, (1474), 5 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:14,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:46:14,159 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:46:14,166 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 (36)] Forceful destruction successful, exit code 0 [2023-08-29 22:46:14,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:46:14,360 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:46:14,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:46:14,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1181695946, now seen corresponding path program 3 times [2023-08-29 22:46:14,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:46:14,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534039946] [2023-08-29 22:46:14,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:46:14,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:46:14,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:46:14,361 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:46:14,362 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 (37)] Waiting until timeout for monitored process [2023-08-29 22:46:15,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-29 22:46:15,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:46:15,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:46:15,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:46:15,883 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:46:15,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:46:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:46:16,008 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:46:16,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534039946] [2023-08-29 22:46:16,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534039946] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:46:16,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:46:16,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-29 22:46:16,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380553619] [2023-08-29 22:46:16,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:46:16,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 22:46:16,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:46:16,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 22:46:16,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-29 22:46:16,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 744 [2023-08-29 22:46:16,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 59 transitions, 330 flow. Second operand has 14 states, 14 states have (on average 316.42857142857144) internal successors, (4430), 14 states have internal predecessors, (4430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:16,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:46:16,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 744 [2023-08-29 22:46:16,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:46:22,391 INFO L130 PetriNetUnfolder]: 26843/40146 cut-off events. [2023-08-29 22:46:22,391 INFO L131 PetriNetUnfolder]: For 28990/28990 co-relation queries the response was YES. [2023-08-29 22:46:22,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111277 conditions, 40146 events. 26843/40146 cut-off events. For 28990/28990 co-relation queries the response was YES. Maximal size of possible extension queue 903. Compared 265619 event pairs, 853 based on Foata normal form. 1320/41466 useless extension candidates. Maximal degree in co-relation 111255. Up to 6786 conditions per place. [2023-08-29 22:46:22,767 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 204 selfloop transitions, 6 changer transitions 0/210 dead transitions. [2023-08-29 22:46:22,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 210 transitions, 1296 flow [2023-08-29 22:46:22,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:46:22,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:46:22,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2649 transitions. [2023-08-29 22:46:22,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44506048387096775 [2023-08-29 22:46:22,770 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2649 transitions. [2023-08-29 22:46:22,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2649 transitions. [2023-08-29 22:46:22,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:46:22,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2649 transitions. [2023-08-29 22:46:22,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 331.125) internal successors, (2649), 8 states have internal predecessors, (2649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:22,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:22,777 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:22,777 INFO L175 Difference]: Start difference. First operand has 93 places, 59 transitions, 330 flow. Second operand 8 states and 2649 transitions. [2023-08-29 22:46:22,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 210 transitions, 1296 flow [2023-08-29 22:46:23,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 210 transitions, 1276 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-29 22:46:23,060 INFO L231 Difference]: Finished difference. Result has 89 places, 56 transitions, 292 flow [2023-08-29 22:46:23,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=292, PETRI_PLACES=89, PETRI_TRANSITIONS=56} [2023-08-29 22:46:23,061 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 24 predicate places. [2023-08-29 22:46:23,061 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 56 transitions, 292 flow [2023-08-29 22:46:23,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 316.42857142857144) internal successors, (4430), 14 states have internal predecessors, (4430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:23,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:46:23,061 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:46:23,076 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 (37)] Forceful destruction successful, exit code 0 [2023-08-29 22:46:23,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:46:23,262 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:46:23,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:46:23,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1884720094, now seen corresponding path program 1 times [2023-08-29 22:46:23,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:46:23,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1083394116] [2023-08-29 22:46:23,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:46:23,263 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:46:23,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:46:23,263 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:46:23,264 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 (38)] Waiting until timeout for monitored process [2023-08-29 22:46:23,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:46:23,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:46:23,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:46:23,628 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:46:23,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:46:23,628 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:46:23,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1083394116] [2023-08-29 22:46:23,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1083394116] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:46:23,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:46:23,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:46:23,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651502584] [2023-08-29 22:46:23,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:46:23,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:46:23,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:46:23,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:46:23,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:46:23,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 744 [2023-08-29 22:46:23,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 56 transitions, 292 flow. Second operand has 4 states, 4 states have (on average 318.25) internal successors, (1273), 4 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:23,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:46:23,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 744 [2023-08-29 22:46:23,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:46:28,727 INFO L130 PetriNetUnfolder]: 26789/40092 cut-off events. [2023-08-29 22:46:28,727 INFO L131 PetriNetUnfolder]: For 29367/29367 co-relation queries the response was YES. [2023-08-29 22:46:28,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110285 conditions, 40092 events. 26789/40092 cut-off events. For 29367/29367 co-relation queries the response was YES. Maximal size of possible extension queue 931. Compared 268138 event pairs, 22285 based on Foata normal form. 54/40146 useless extension candidates. Maximal degree in co-relation 110268. Up to 33375 conditions per place. [2023-08-29 22:46:29,082 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 100 selfloop transitions, 3 changer transitions 2/105 dead transitions. [2023-08-29 22:46:29,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 105 transitions, 705 flow [2023-08-29 22:46:29,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:46:29,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:46:29,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1311 transitions. [2023-08-29 22:46:29,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4405241935483871 [2023-08-29 22:46:29,084 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1311 transitions. [2023-08-29 22:46:29,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1311 transitions. [2023-08-29 22:46:29,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:46:29,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1311 transitions. [2023-08-29 22:46:29,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 327.75) internal successors, (1311), 4 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:29,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:29,087 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:29,087 INFO L175 Difference]: Start difference. First operand has 89 places, 56 transitions, 292 flow. Second operand 4 states and 1311 transitions. [2023-08-29 22:46:29,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 105 transitions, 705 flow [2023-08-29 22:46:29,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 105 transitions, 674 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 22:46:29,133 INFO L231 Difference]: Finished difference. Result has 88 places, 57 transitions, 297 flow [2023-08-29 22:46:29,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=297, PETRI_PLACES=88, PETRI_TRANSITIONS=57} [2023-08-29 22:46:29,134 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 23 predicate places. [2023-08-29 22:46:29,134 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 57 transitions, 297 flow [2023-08-29 22:46:29,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 318.25) internal successors, (1273), 4 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:29,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:46:29,134 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:46:29,145 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 (38)] Forceful destruction successful, exit code 0 [2023-08-29 22:46:29,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:46:29,335 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:46:29,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:46:29,335 INFO L85 PathProgramCache]: Analyzing trace with hash 867227724, now seen corresponding path program 2 times [2023-08-29 22:46:29,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:46:29,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177974819] [2023-08-29 22:46:29,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:46:29,336 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:46:29,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:46:29,337 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:46:29,339 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 (39)] Waiting until timeout for monitored process [2023-08-29 22:46:29,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 22:46:29,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:46:29,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:46:29,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:46:29,610 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:46:29,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:46:29,611 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:46:29,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177974819] [2023-08-29 22:46:29,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177974819] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:46:29,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:46:29,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 22:46:29,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151776629] [2023-08-29 22:46:29,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:46:29,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:46:29,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:46:29,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:46:29,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:46:29,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 744 [2023-08-29 22:46:29,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 57 transitions, 297 flow. Second operand has 6 states, 6 states have (on average 309.1666666666667) internal successors, (1855), 6 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:29,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:46:29,682 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 744 [2023-08-29 22:46:29,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:46:34,904 INFO L130 PetriNetUnfolder]: 26881/40310 cut-off events. [2023-08-29 22:46:34,904 INFO L131 PetriNetUnfolder]: For 28761/28761 co-relation queries the response was YES. [2023-08-29 22:46:35,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113255 conditions, 40310 events. 26881/40310 cut-off events. For 28761/28761 co-relation queries the response was YES. Maximal size of possible extension queue 902. Compared 271155 event pairs, 20573 based on Foata normal form. 66/40376 useless extension candidates. Maximal degree in co-relation 113236. Up to 30889 conditions per place. [2023-08-29 22:46:35,305 INFO L137 encePairwiseOnDemand]: 737/744 looper letters, 147 selfloop transitions, 14 changer transitions 20/181 dead transitions. [2023-08-29 22:46:35,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 181 transitions, 1224 flow [2023-08-29 22:46:35,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:46:35,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:46:35,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2552 transitions. [2023-08-29 22:46:35,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42876344086021506 [2023-08-29 22:46:35,308 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2552 transitions. [2023-08-29 22:46:35,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2552 transitions. [2023-08-29 22:46:35,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:46:35,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2552 transitions. [2023-08-29 22:46:35,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 319.0) internal successors, (2552), 8 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:35,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:35,313 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:35,313 INFO L175 Difference]: Start difference. First operand has 88 places, 57 transitions, 297 flow. Second operand 8 states and 2552 transitions. [2023-08-29 22:46:35,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 181 transitions, 1224 flow [2023-08-29 22:46:35,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 181 transitions, 1196 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:46:35,374 INFO L231 Difference]: Finished difference. Result has 98 places, 67 transitions, 386 flow [2023-08-29 22:46:35,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=386, PETRI_PLACES=98, PETRI_TRANSITIONS=67} [2023-08-29 22:46:35,374 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 33 predicate places. [2023-08-29 22:46:35,374 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 67 transitions, 386 flow [2023-08-29 22:46:35,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 309.1666666666667) internal successors, (1855), 6 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:35,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:46:35,375 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:46:35,383 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 (39)] Forceful destruction successful, exit code 0 [2023-08-29 22:46:35,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:46:35,581 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:46:35,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:46:35,581 INFO L85 PathProgramCache]: Analyzing trace with hash -579521980, now seen corresponding path program 3 times [2023-08-29 22:46:35,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:46:35,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760324023] [2023-08-29 22:46:35,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:46:35,582 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:46:35,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:46:35,583 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:46:35,583 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 (40)] Waiting until timeout for monitored process [2023-08-29 22:46:35,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-29 22:46:35,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:46:35,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:46:35,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:46:35,842 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:46:35,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:46:35,842 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:46:35,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760324023] [2023-08-29 22:46:35,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760324023] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:46:35,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:46:35,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:46:35,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088364326] [2023-08-29 22:46:35,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:46:35,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:46:35,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:46:35,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:46:35,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:46:35,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 744 [2023-08-29 22:46:35,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 67 transitions, 386 flow. Second operand has 4 states, 4 states have (on average 317.25) internal successors, (1269), 4 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:35,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:46:35,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 744 [2023-08-29 22:46:35,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:46:41,176 INFO L130 PetriNetUnfolder]: 26729/39996 cut-off events. [2023-08-29 22:46:41,176 INFO L131 PetriNetUnfolder]: For 63336/63336 co-relation queries the response was YES. [2023-08-29 22:46:41,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140274 conditions, 39996 events. 26729/39996 cut-off events. For 63336/63336 co-relation queries the response was YES. Maximal size of possible extension queue 899. Compared 265669 event pairs, 22561 based on Foata normal form. 36/40032 useless extension candidates. Maximal degree in co-relation 140250. Up to 34077 conditions per place. [2023-08-29 22:46:41,616 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 81 selfloop transitions, 5 changer transitions 7/93 dead transitions. [2023-08-29 22:46:41,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 93 transitions, 708 flow [2023-08-29 22:46:41,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:46:41,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:46:41,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 980 transitions. [2023-08-29 22:46:41,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4390681003584229 [2023-08-29 22:46:41,618 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 980 transitions. [2023-08-29 22:46:41,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 980 transitions. [2023-08-29 22:46:41,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:46:41,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 980 transitions. [2023-08-29 22:46:41,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:41,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:41,620 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:41,620 INFO L175 Difference]: Start difference. First operand has 98 places, 67 transitions, 386 flow. Second operand 3 states and 980 transitions. [2023-08-29 22:46:41,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 93 transitions, 708 flow [2023-08-29 22:46:41,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 93 transitions, 689 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-29 22:46:41,782 INFO L231 Difference]: Finished difference. Result has 97 places, 64 transitions, 370 flow [2023-08-29 22:46:41,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=370, PETRI_PLACES=97, PETRI_TRANSITIONS=64} [2023-08-29 22:46:41,783 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 32 predicate places. [2023-08-29 22:46:41,783 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 64 transitions, 370 flow [2023-08-29 22:46:41,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 317.25) internal successors, (1269), 4 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:41,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:46:41,783 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:46:41,790 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 (40)] Forceful destruction successful, exit code 0 [2023-08-29 22:46:41,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:46:41,984 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:46:41,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:46:41,984 INFO L85 PathProgramCache]: Analyzing trace with hash -372820549, now seen corresponding path program 1 times [2023-08-29 22:46:41,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:46:41,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085583428] [2023-08-29 22:46:41,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:46:41,985 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:46:41,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:46:41,985 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:46:41,987 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 (41)] Waiting until timeout for monitored process [2023-08-29 22:46:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:46:42,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:46:42,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:46:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:46:42,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:46:42,436 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:46:42,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085583428] [2023-08-29 22:46:42,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085583428] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:46:42,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:46:42,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:46:42,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237846247] [2023-08-29 22:46:42,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:46:42,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:46:42,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:46:42,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:46:42,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:46:42,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 744 [2023-08-29 22:46:42,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 64 transitions, 370 flow. Second operand has 4 states, 4 states have (on average 316.5) internal successors, (1266), 4 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:42,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:46:42,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 744 [2023-08-29 22:46:42,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:46:48,165 INFO L130 PetriNetUnfolder]: 25719/38456 cut-off events. [2023-08-29 22:46:48,165 INFO L131 PetriNetUnfolder]: For 70111/70111 co-relation queries the response was YES. [2023-08-29 22:46:48,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135212 conditions, 38456 events. 25719/38456 cut-off events. For 70111/70111 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 255242 event pairs, 20359 based on Foata normal form. 442/38898 useless extension candidates. Maximal degree in co-relation 135187. Up to 30791 conditions per place. [2023-08-29 22:46:48,575 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 123 selfloop transitions, 5 changer transitions 0/128 dead transitions. [2023-08-29 22:46:48,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 128 transitions, 973 flow [2023-08-29 22:46:48,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:46:48,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:46:48,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1305 transitions. [2023-08-29 22:46:48,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43850806451612906 [2023-08-29 22:46:48,577 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1305 transitions. [2023-08-29 22:46:48,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1305 transitions. [2023-08-29 22:46:48,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:46:48,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1305 transitions. [2023-08-29 22:46:48,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 326.25) internal successors, (1305), 4 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:48,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:48,581 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:48,581 INFO L175 Difference]: Start difference. First operand has 97 places, 64 transitions, 370 flow. Second operand 4 states and 1305 transitions. [2023-08-29 22:46:48,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 128 transitions, 973 flow [2023-08-29 22:46:48,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 128 transitions, 924 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-29 22:46:48,772 INFO L231 Difference]: Finished difference. Result has 99 places, 67 transitions, 404 flow [2023-08-29 22:46:48,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=404, PETRI_PLACES=99, PETRI_TRANSITIONS=67} [2023-08-29 22:46:48,772 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 34 predicate places. [2023-08-29 22:46:48,773 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 67 transitions, 404 flow [2023-08-29 22:46:48,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 316.5) internal successors, (1266), 4 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:48,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:46:48,773 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:46:48,785 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 (41)] Forceful destruction successful, exit code 0 [2023-08-29 22:46:48,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:46:48,985 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:46:48,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:46:48,986 INFO L85 PathProgramCache]: Analyzing trace with hash 720234385, now seen corresponding path program 2 times [2023-08-29 22:46:48,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:46:48,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487933453] [2023-08-29 22:46:48,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:46:48,986 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:46:48,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:46:48,987 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:46:48,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2023-08-29 22:46:49,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:46:49,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:46:49,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:46:49,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:46:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:46:49,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:46:49,455 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:46:49,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487933453] [2023-08-29 22:46:49,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487933453] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:46:49,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:46:49,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:46:49,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462109996] [2023-08-29 22:46:49,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:46:49,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:46:49,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:46:49,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:46:49,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:46:49,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 744 [2023-08-29 22:46:49,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 67 transitions, 404 flow. Second operand has 4 states, 4 states have (on average 317.5) internal successors, (1270), 4 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:49,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:46:49,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 744 [2023-08-29 22:46:49,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:46:54,604 INFO L130 PetriNetUnfolder]: 24833/36958 cut-off events. [2023-08-29 22:46:54,604 INFO L131 PetriNetUnfolder]: For 68783/68783 co-relation queries the response was YES. [2023-08-29 22:46:54,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133183 conditions, 36958 events. 24833/36958 cut-off events. For 68783/68783 co-relation queries the response was YES. Maximal size of possible extension queue 814. Compared 245670 event pairs, 1455 based on Foata normal form. 442/37400 useless extension candidates. Maximal degree in co-relation 133157. Up to 32584 conditions per place. [2023-08-29 22:46:55,011 INFO L137 encePairwiseOnDemand]: 738/744 looper letters, 105 selfloop transitions, 8 changer transitions 1/114 dead transitions. [2023-08-29 22:46:55,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 114 transitions, 872 flow [2023-08-29 22:46:55,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:46:55,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:46:55,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1298 transitions. [2023-08-29 22:46:55,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361559139784946 [2023-08-29 22:46:55,013 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1298 transitions. [2023-08-29 22:46:55,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1298 transitions. [2023-08-29 22:46:55,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:46:55,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1298 transitions. [2023-08-29 22:46:55,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 324.5) internal successors, (1298), 4 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:55,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:55,015 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:55,015 INFO L175 Difference]: Start difference. First operand has 99 places, 67 transitions, 404 flow. Second operand 4 states and 1298 transitions. [2023-08-29 22:46:55,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 114 transitions, 872 flow [2023-08-29 22:46:55,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 114 transitions, 859 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-29 22:46:55,197 INFO L231 Difference]: Finished difference. Result has 103 places, 68 transitions, 434 flow [2023-08-29 22:46:55,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=434, PETRI_PLACES=103, PETRI_TRANSITIONS=68} [2023-08-29 22:46:55,198 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 38 predicate places. [2023-08-29 22:46:55,198 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 68 transitions, 434 flow [2023-08-29 22:46:55,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 317.5) internal successors, (1270), 4 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:55,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:46:55,198 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:46:55,208 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 (42)] Ended with exit code 0 [2023-08-29 22:46:55,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:46:55,399 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:46:55,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:46:55,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1444990752, now seen corresponding path program 1 times [2023-08-29 22:46:55,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:46:55,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024192456] [2023-08-29 22:46:55,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:46:55,400 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:46:55,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:46:55,401 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:46:55,401 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 (43)] Waiting until timeout for monitored process [2023-08-29 22:46:55,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:46:55,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 22:46:55,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:46:55,865 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-29 22:46:55,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:46:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-29 22:46:55,889 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:46:55,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024192456] [2023-08-29 22:46:55,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024192456] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-29 22:46:55,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 22:46:55,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-08-29 22:46:55,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861674300] [2023-08-29 22:46:55,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:46:55,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:46:55,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:46:55,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:46:55,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-29 22:46:55,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 744 [2023-08-29 22:46:55,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 68 transitions, 434 flow. Second operand has 5 states, 5 states have (on average 312.6) internal successors, (1563), 5 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:46:55,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:46:55,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 744 [2023-08-29 22:46:55,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:01,365 INFO L130 PetriNetUnfolder]: 25855/38408 cut-off events. [2023-08-29 22:47:01,365 INFO L131 PetriNetUnfolder]: For 81519/81519 co-relation queries the response was YES. [2023-08-29 22:47:01,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139016 conditions, 38408 events. 25855/38408 cut-off events. For 81519/81519 co-relation queries the response was YES. Maximal size of possible extension queue 851. Compared 250501 event pairs, 2166 based on Foata normal form. 480/38888 useless extension candidates. Maximal degree in co-relation 138988. Up to 21388 conditions per place. [2023-08-29 22:47:01,814 INFO L137 encePairwiseOnDemand]: 736/744 looper letters, 139 selfloop transitions, 34 changer transitions 1/174 dead transitions. [2023-08-29 22:47:01,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 174 transitions, 1425 flow [2023-08-29 22:47:01,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 22:47:01,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 22:47:01,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2235 transitions. [2023-08-29 22:47:01,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42914746543778803 [2023-08-29 22:47:01,817 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2235 transitions. [2023-08-29 22:47:01,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2235 transitions. [2023-08-29 22:47:01,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:01,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2235 transitions. [2023-08-29 22:47:01,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 319.2857142857143) internal successors, (2235), 7 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:01,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 744.0) internal successors, (5952), 8 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:01,821 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 744.0) internal successors, (5952), 8 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:01,821 INFO L175 Difference]: Start difference. First operand has 103 places, 68 transitions, 434 flow. Second operand 7 states and 2235 transitions. [2023-08-29 22:47:01,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 174 transitions, 1425 flow [2023-08-29 22:47:02,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 174 transitions, 1369 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-29 22:47:02,023 INFO L231 Difference]: Finished difference. Result has 106 places, 88 transitions, 641 flow [2023-08-29 22:47:02,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=641, PETRI_PLACES=106, PETRI_TRANSITIONS=88} [2023-08-29 22:47:02,023 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 41 predicate places. [2023-08-29 22:47:02,023 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 88 transitions, 641 flow [2023-08-29 22:47:02,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 312.6) internal successors, (1563), 5 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:02,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:02,023 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:47:02,033 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 (43)] Forceful destruction successful, exit code 0 [2023-08-29 22:47:02,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:02,224 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:47:02,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:02,224 INFO L85 PathProgramCache]: Analyzing trace with hash -2069545900, now seen corresponding path program 2 times [2023-08-29 22:47:02,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:02,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332748418] [2023-08-29 22:47:02,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:47:02,225 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:02,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:02,226 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:02,227 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 (44)] Waiting until timeout for monitored process [2023-08-29 22:47:02,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:47:02,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:47:02,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:47:02,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:47:02,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:47:02,812 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:47:02,812 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:02,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332748418] [2023-08-29 22:47:02,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332748418] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-29 22:47:02,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 22:47:02,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-08-29 22:47:02,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146975637] [2023-08-29 22:47:02,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:47:02,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:47:02,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:02,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:47:02,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-29 22:47:02,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 744 [2023-08-29 22:47:02,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 88 transitions, 641 flow. Second operand has 6 states, 6 states have (on average 309.6666666666667) internal successors, (1858), 6 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:02,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:02,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 744 [2023-08-29 22:47:02,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:09,189 INFO L130 PetriNetUnfolder]: 29037/43411 cut-off events. [2023-08-29 22:47:09,189 INFO L131 PetriNetUnfolder]: For 126733/126733 co-relation queries the response was YES. [2023-08-29 22:47:09,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171156 conditions, 43411 events. 29037/43411 cut-off events. For 126733/126733 co-relation queries the response was YES. Maximal size of possible extension queue 990. Compared 288733 event pairs, 4011 based on Foata normal form. 25/43436 useless extension candidates. Maximal degree in co-relation 171128. Up to 21361 conditions per place. [2023-08-29 22:47:09,581 INFO L137 encePairwiseOnDemand]: 736/744 looper letters, 147 selfloop transitions, 36 changer transitions 23/206 dead transitions. [2023-08-29 22:47:09,581 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 206 transitions, 1657 flow [2023-08-29 22:47:09,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 22:47:09,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 22:47:09,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2238 transitions. [2023-08-29 22:47:09,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42972350230414746 [2023-08-29 22:47:09,583 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2238 transitions. [2023-08-29 22:47:09,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2238 transitions. [2023-08-29 22:47:09,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:09,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2238 transitions. [2023-08-29 22:47:09,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 319.7142857142857) internal successors, (2238), 7 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:09,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 744.0) internal successors, (5952), 8 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:09,587 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 744.0) internal successors, (5952), 8 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:09,587 INFO L175 Difference]: Start difference. First operand has 106 places, 88 transitions, 641 flow. Second operand 7 states and 2238 transitions. [2023-08-29 22:47:09,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 206 transitions, 1657 flow [2023-08-29 22:47:10,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 206 transitions, 1655 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-29 22:47:10,972 INFO L231 Difference]: Finished difference. Result has 115 places, 95 transitions, 802 flow [2023-08-29 22:47:10,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=802, PETRI_PLACES=115, PETRI_TRANSITIONS=95} [2023-08-29 22:47:10,972 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 50 predicate places. [2023-08-29 22:47:10,973 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 95 transitions, 802 flow [2023-08-29 22:47:10,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 309.6666666666667) internal successors, (1858), 6 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:10,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:10,973 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:47:10,984 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 (44)] Ended with exit code 0 [2023-08-29 22:47:11,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:11,174 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:47:11,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:11,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1732628426, now seen corresponding path program 3 times [2023-08-29 22:47:11,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:11,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [700552312] [2023-08-29 22:47:11,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:47:11,175 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:11,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:11,175 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:11,178 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 (45)] Waiting until timeout for monitored process [2023-08-29 22:47:11,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-29 22:47:11,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:47:11,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 22:47:11,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-29 22:47:11,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:47:11,597 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:11,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [700552312] [2023-08-29 22:47:11,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [700552312] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:47:11,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:47:11,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 22:47:11,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563377233] [2023-08-29 22:47:11,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:47:11,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:47:11,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:11,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:47:11,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:47:11,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 744 [2023-08-29 22:47:11,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 95 transitions, 802 flow. Second operand has 5 states, 5 states have (on average 313.6) internal successors, (1568), 5 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:11,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:11,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 744 [2023-08-29 22:47:11,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:17,552 INFO L130 PetriNetUnfolder]: 27228/40415 cut-off events. [2023-08-29 22:47:17,552 INFO L131 PetriNetUnfolder]: For 147367/147367 co-relation queries the response was YES. [2023-08-29 22:47:18,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171691 conditions, 40415 events. 27228/40415 cut-off events. For 147367/147367 co-relation queries the response was YES. Maximal size of possible extension queue 889. Compared 261507 event pairs, 17213 based on Foata normal form. 58/40473 useless extension candidates. Maximal degree in co-relation 171659. Up to 30737 conditions per place. [2023-08-29 22:47:18,233 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 121 selfloop transitions, 14 changer transitions 17/152 dead transitions. [2023-08-29 22:47:18,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 152 transitions, 1410 flow [2023-08-29 22:47:18,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:47:18,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:47:18,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1610 transitions. [2023-08-29 22:47:18,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4327956989247312 [2023-08-29 22:47:18,235 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1610 transitions. [2023-08-29 22:47:18,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1610 transitions. [2023-08-29 22:47:18,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:18,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1610 transitions. [2023-08-29 22:47:18,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 322.0) internal successors, (1610), 5 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:18,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:18,239 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:18,239 INFO L175 Difference]: Start difference. First operand has 115 places, 95 transitions, 802 flow. Second operand 5 states and 1610 transitions. [2023-08-29 22:47:18,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 152 transitions, 1410 flow [2023-08-29 22:47:19,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 152 transitions, 1389 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-29 22:47:19,364 INFO L231 Difference]: Finished difference. Result has 117 places, 96 transitions, 829 flow [2023-08-29 22:47:19,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=829, PETRI_PLACES=117, PETRI_TRANSITIONS=96} [2023-08-29 22:47:19,364 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 52 predicate places. [2023-08-29 22:47:19,364 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 96 transitions, 829 flow [2023-08-29 22:47:19,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 313.6) internal successors, (1568), 5 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:19,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:19,365 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:47:19,374 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 (45)] Ended with exit code 0 [2023-08-29 22:47:19,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:19,565 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:47:19,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:19,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1229982778, now seen corresponding path program 4 times [2023-08-29 22:47:19,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:19,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [406967464] [2023-08-29 22:47:19,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 22:47:19,566 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:19,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:19,567 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:19,570 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 (46)] Waiting until timeout for monitored process [2023-08-29 22:47:19,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 22:47:19,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:47:19,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 22:47:20,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:20,022 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-29 22:47:20,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:47:20,022 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:20,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [406967464] [2023-08-29 22:47:20,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [406967464] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:47:20,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:47:20,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 22:47:20,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135681996] [2023-08-29 22:47:20,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:47:20,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:47:20,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:20,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:47:20,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:47:20,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 744 [2023-08-29 22:47:20,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 96 transitions, 829 flow. Second operand has 5 states, 5 states have (on average 312.6) internal successors, (1563), 5 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:20,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:20,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 744 [2023-08-29 22:47:20,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:26,142 INFO L130 PetriNetUnfolder]: 27765/41374 cut-off events. [2023-08-29 22:47:26,142 INFO L131 PetriNetUnfolder]: For 156514/156514 co-relation queries the response was YES. [2023-08-29 22:47:26,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177375 conditions, 41374 events. 27765/41374 cut-off events. For 156514/156514 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 270504 event pairs, 18283 based on Foata normal form. 480/41854 useless extension candidates. Maximal degree in co-relation 177342. Up to 34131 conditions per place. [2023-08-29 22:47:26,826 INFO L137 encePairwiseOnDemand]: 738/744 looper letters, 151 selfloop transitions, 16 changer transitions 1/168 dead transitions. [2023-08-29 22:47:26,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 168 transitions, 1564 flow [2023-08-29 22:47:26,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:47:26,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:47:26,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1923 transitions. [2023-08-29 22:47:26,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4307795698924731 [2023-08-29 22:47:26,828 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1923 transitions. [2023-08-29 22:47:26,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1923 transitions. [2023-08-29 22:47:26,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:26,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1923 transitions. [2023-08-29 22:47:26,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 320.5) internal successors, (1923), 6 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:26,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 744.0) internal successors, (5208), 7 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:26,834 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 744.0) internal successors, (5208), 7 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:26,834 INFO L175 Difference]: Start difference. First operand has 117 places, 96 transitions, 829 flow. Second operand 6 states and 1923 transitions. [2023-08-29 22:47:26,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 168 transitions, 1564 flow [2023-08-29 22:47:28,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 168 transitions, 1551 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 22:47:28,406 INFO L231 Difference]: Finished difference. Result has 121 places, 96 transitions, 860 flow [2023-08-29 22:47:28,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=860, PETRI_PLACES=121, PETRI_TRANSITIONS=96} [2023-08-29 22:47:28,407 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 56 predicate places. [2023-08-29 22:47:28,407 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 96 transitions, 860 flow [2023-08-29 22:47:28,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 312.6) internal successors, (1563), 5 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:28,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:28,407 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:47:28,418 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 (46)] Forceful destruction successful, exit code 0 [2023-08-29 22:47:28,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:28,608 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:47:28,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:28,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1696100410, now seen corresponding path program 5 times [2023-08-29 22:47:28,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:28,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912478305] [2023-08-29 22:47:28,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 22:47:28,609 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:28,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:28,610 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:28,611 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 (47)] Waiting until timeout for monitored process [2023-08-29 22:47:29,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-29 22:47:29,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:47:29,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 22:47:29,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:29,386 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-29 22:47:29,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:47:29,386 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:29,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912478305] [2023-08-29 22:47:29,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912478305] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:47:29,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:47:29,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 22:47:29,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126506151] [2023-08-29 22:47:29,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:47:29,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:47:29,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:29,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:47:29,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:47:29,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 744 [2023-08-29 22:47:29,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 96 transitions, 860 flow. Second operand has 5 states, 5 states have (on average 313.6) internal successors, (1568), 5 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:29,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:29,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 744 [2023-08-29 22:47:29,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:35,236 INFO L130 PetriNetUnfolder]: 26876/39759 cut-off events. [2023-08-29 22:47:35,236 INFO L131 PetriNetUnfolder]: For 157340/157340 co-relation queries the response was YES. [2023-08-29 22:47:35,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173819 conditions, 39759 events. 26876/39759 cut-off events. For 157340/157340 co-relation queries the response was YES. Maximal size of possible extension queue 874. Compared 254511 event pairs, 19364 based on Foata normal form. 58/39817 useless extension candidates. Maximal degree in co-relation 173785. Up to 36636 conditions per place. [2023-08-29 22:47:35,774 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 113 selfloop transitions, 13 changer transitions 17/143 dead transitions. [2023-08-29 22:47:35,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 143 transitions, 1405 flow [2023-08-29 22:47:35,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:47:35,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:47:35,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1605 transitions. [2023-08-29 22:47:35,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2023-08-29 22:47:35,776 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1605 transitions. [2023-08-29 22:47:35,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1605 transitions. [2023-08-29 22:47:35,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:35,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1605 transitions. [2023-08-29 22:47:35,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:35,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:35,779 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:35,779 INFO L175 Difference]: Start difference. First operand has 121 places, 96 transitions, 860 flow. Second operand 5 states and 1605 transitions. [2023-08-29 22:47:35,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 143 transitions, 1405 flow [2023-08-29 22:47:37,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 143 transitions, 1320 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-29 22:47:37,488 INFO L231 Difference]: Finished difference. Result has 118 places, 94 transitions, 783 flow [2023-08-29 22:47:37,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=783, PETRI_PLACES=118, PETRI_TRANSITIONS=94} [2023-08-29 22:47:37,488 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 53 predicate places. [2023-08-29 22:47:37,489 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 94 transitions, 783 flow [2023-08-29 22:47:37,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 313.6) internal successors, (1568), 5 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:37,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:37,489 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:47:37,502 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 (47)] Ended with exit code 0 [2023-08-29 22:47:37,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:37,692 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-29 22:47:37,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:37,692 INFO L85 PathProgramCache]: Analyzing trace with hash -118222908, now seen corresponding path program 1 times [2023-08-29 22:47:37,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:37,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122363252] [2023-08-29 22:47:37,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:47:37,693 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:37,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:37,694 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:37,695 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 (48)] Waiting until timeout for monitored process [2023-08-29 22:47:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:47:38,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-29 22:47:38,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:38,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2023-08-29 22:47:39,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:47:39,424 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 22:47:39,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 85 [2023-08-29 22:47:42,192 INFO L321 Elim1Store]: treesize reduction 28, result has 71.1 percent of original size [2023-08-29 22:47:42,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 7 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 54 case distinctions, treesize of input 469 treesize of output 249 [2023-08-29 22:47:51,514 WARN L222 SmtUtils]: Spent 8.48s on a formula simplification. DAG size of input: 90 DAG size of output: 86 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 22:48:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:48:02,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:49:00,941 WARN L222 SmtUtils]: Spent 31.86s on a formula simplification. DAG size of input: 805 DAG size of output: 701 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-08-29 22:49:00,945 INFO L321 Elim1Store]: treesize reduction 345, result has 89.0 percent of original size [2023-08-29 22:49:00,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 24 select indices, 24 select index equivalence classes, 0 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 276 case distinctions, treesize of input 2239 treesize of output 4152 [2023-08-29 22:49:02,056 INFO L217 Elim1Store]: Index analysis took 401 ms [2023-08-29 22:49:04,728 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:49:04,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 18 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 48 case distinctions, treesize of input 1333 treesize of output 1552 [2023-08-29 22:49:05,686 INFO L217 Elim1Store]: Index analysis took 518 ms [2023-08-29 22:49:08,499 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:49:08,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 18 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 48 case distinctions, treesize of input 1095 treesize of output 1328 Killed by 15