./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 --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 [2023-08-30 00:56:47,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:56:47,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:56:47,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:56:47,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:56:47,583 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:56:47,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:56:47,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:56:47,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:56:47,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:56:47,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:56:47,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:56:47,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:56:47,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:56:47,599 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:56:47,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:56:47,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:56:47,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:56:47,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:56:47,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:56:47,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:56:47,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:56:47,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:56:47,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:56:47,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:56:47,617 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:56:47,617 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:56:47,619 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:56:47,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:56:47,620 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:56:47,620 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:56:47,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:56:47,622 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:56:47,623 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:56:47,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:56:47,624 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:56:47,624 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:56:47,624 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:56:47,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:56:47,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:56:47,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:56:47,633 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:56:47,659 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:56:47,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:56:47,660 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:56:47,660 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:56:47,661 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:56:47,661 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:56:47,661 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:56:47,661 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:56:47,662 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:56:47,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:56:47,662 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:56:47,662 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:56:47,663 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:56:47,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:56:47,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:56:47,663 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:56:47,663 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:56:47,663 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:56:47,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:56:47,664 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:56:47,664 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:56:47,664 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:56:47,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:56:47,664 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:56:47,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:56:47,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:56:47,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:56:47,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:56:47,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:56:47,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:56:47,665 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:56:47,665 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:56:47,665 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:56:47,666 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:56:47,666 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:56:47,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:56:47,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:56:47,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:56:47,932 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:56:47,932 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:56:47,933 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-08-30 00:56:48,930 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:56:49,152 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:56:49,152 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-08-30 00:56:49,174 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0de1f26fb/ddcd79efd17c4bf7b42a0694770b25a0/FLAGe065effb7 [2023-08-30 00:56:49,183 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0de1f26fb/ddcd79efd17c4bf7b42a0694770b25a0 [2023-08-30 00:56:49,184 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:56:49,185 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:56:49,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:56:49,202 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:56:49,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:56:49,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:56:49" (1/1) ... [2023-08-30 00:56:49,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c8ac9c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:56:49, skipping insertion in model container [2023-08-30 00:56:49,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:56:49" (1/1) ... [2023-08-30 00:56:49,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:56:49,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:56:49,346 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2023-08-30 00:56:49,352 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:56:49,359 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 00:56:49,360 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5cd1025f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:56:49, skipping insertion in model container [2023-08-30 00:56:49,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:56:49,360 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 00:56:49,361 INFO L158 Benchmark]: Toolchain (without parser) took 175.36ms. Allocated memory is still 65.0MB. Free memory was 43.7MB in the beginning and 34.1MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 00:56:49,362 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 50.3MB. Free memory was 28.6MB in the beginning and 28.6MB in the end (delta: 30.1kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:56:49,362 INFO L158 Benchmark]: CACSL2BoogieTranslator took 158.12ms. Allocated memory is still 65.0MB. Free memory was 43.6MB in the beginning and 34.1MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 00:56:49,363 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 50.3MB. Free memory was 28.6MB in the beginning and 28.6MB in the end (delta: 30.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 158.12ms. Allocated memory is still 65.0MB. Free memory was 43.6MB in the beginning and 34.1MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 103]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 --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 [2023-08-30 00:56:51,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:56:51,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:56:51,060 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:56:51,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:56:51,067 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:56:51,069 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:56:51,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:56:51,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:56:51,077 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:56:51,078 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:56:51,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:56:51,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:56:51,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:56:51,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:56:51,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:56:51,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:56:51,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:56:51,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:56:51,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:56:51,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:56:51,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:56:51,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:56:51,095 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:56:51,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:56:51,102 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:56:51,102 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:56:51,104 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:56:51,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:56:51,105 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:56:51,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:56:51,106 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:56:51,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:56:51,108 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:56:51,109 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:56:51,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:56:51,109 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:56:51,109 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:56:51,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:56:51,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:56:51,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:56:51,112 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 00:56:51,144 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:56:51,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:56:51,145 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:56:51,146 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:56:51,146 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:56:51,146 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:56:51,147 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:56:51,147 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:56:51,147 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:56:51,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:56:51,148 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:56:51,148 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:56:51,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:56:51,149 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:56:51,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:56:51,149 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:56:51,149 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:56:51,149 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:56:51,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:56:51,150 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:56:51,150 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 00:56:51,150 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 00:56:51,150 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:56:51,150 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:56:51,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:56:51,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:56:51,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:56:51,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:56:51,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:56:51,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:56:51,151 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 00:56:51,151 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 00:56:51,152 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:56:51,152 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:56:51,152 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:56:51,152 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 00:56:51,152 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:56:51,153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:56:51,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:56:51,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:56:51,416 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:56:51,416 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:56:51,417 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:56:51,418 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-08-30 00:56:52,414 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:56:52,614 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:56:52,615 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-08-30 00:56:52,622 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00de08146/550e7874bfdd4d3cbff9e0cd185080ed/FLAG48586a586 [2023-08-30 00:56:52,643 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00de08146/550e7874bfdd4d3cbff9e0cd185080ed [2023-08-30 00:56:52,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:56:52,646 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:56:52,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:56:52,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:56:52,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:56:52,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:56:52" (1/1) ... [2023-08-30 00:56:52,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cd617c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:56:52, skipping insertion in model container [2023-08-30 00:56:52,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:56:52" (1/1) ... [2023-08-30 00:56:52,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:56:52,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:56:52,811 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2023-08-30 00:56:52,821 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:56:52,836 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 00:56:52,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:56:52,863 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2023-08-30 00:56:52,867 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:56:52,875 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:56:52,920 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2023-08-30 00:56:52,924 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:56:52,942 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:56:52,943 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:56:52,947 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:56:52,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:56:52 WrapperNode [2023-08-30 00:56:52,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:56:52,948 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:56:52,948 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:56:52,949 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:56:52,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:56:52" (1/1) ... [2023-08-30 00:56:52,968 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:56:52" (1/1) ... [2023-08-30 00:56:52,990 INFO L138 Inliner]: procedures = 26, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 144 [2023-08-30 00:56:52,990 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:56:52,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:56:52,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:56:52,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:56:52,997 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:56:52" (1/1) ... [2023-08-30 00:56:52,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:56:52" (1/1) ... [2023-08-30 00:56:53,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:56:52" (1/1) ... [2023-08-30 00:56:53,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:56:52" (1/1) ... [2023-08-30 00:56:53,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:56:52" (1/1) ... [2023-08-30 00:56:53,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:56:52" (1/1) ... [2023-08-30 00:56:53,026 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:56:52" (1/1) ... [2023-08-30 00:56:53,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:56:52" (1/1) ... [2023-08-30 00:56:53,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:56:53,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:56:53,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:56:53,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:56:53,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:56:52" (1/1) ... [2023-08-30 00:56:53,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:56:53,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:56:53,053 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 00:56:53,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:56:53,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 00:56:53,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:56:53,076 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 00:56:53,076 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:56:53,076 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:56:53,076 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:56:53,076 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:56:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:56:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:56:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 00:56:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:56:53,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:56:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:56:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 00:56:53,078 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 00:56:53,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 00:56:53,221 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:56:53,223 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:56:53,500 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:56:53,614 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:56:53,617 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 00:56:53,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:56:53 BoogieIcfgContainer [2023-08-30 00:56:53,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:56:53,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:56:53,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:56:53,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:56:53,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:56:52" (1/3) ... [2023-08-30 00:56:53,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@664b04c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:56:53, skipping insertion in model container [2023-08-30 00:56:53,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:56:52" (2/3) ... [2023-08-30 00:56:53,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@664b04c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:56:53, skipping insertion in model container [2023-08-30 00:56:53,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:56:53" (3/3) ... [2023-08-30 00:56:53,625 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2023-08-30 00:56:53,637 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:56:53,638 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-08-30 00:56:53,638 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:56:53,702 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 00:56:53,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 144 transitions, 304 flow [2023-08-30 00:56:53,760 INFO L130 PetriNetUnfolder]: 11/142 cut-off events. [2023-08-30 00:56:53,760 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 00:56:53,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 142 events. 11/142 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 150 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2023-08-30 00:56:53,781 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 144 transitions, 304 flow [2023-08-30 00:56:53,784 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 138 transitions, 288 flow [2023-08-30 00:56:53,786 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:56:53,792 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 138 transitions, 288 flow [2023-08-30 00:56:53,797 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 138 transitions, 288 flow [2023-08-30 00:56:53,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 138 transitions, 288 flow [2023-08-30 00:56:53,832 INFO L130 PetriNetUnfolder]: 11/138 cut-off events. [2023-08-30 00:56:53,833 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 00:56:53,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 138 events. 11/138 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 149 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2023-08-30 00:56:53,836 INFO L119 LiptonReduction]: Number of co-enabled transitions 1336 [2023-08-30 00:57:05,249 INFO L134 LiptonReduction]: Checked pairs total: 1708 [2023-08-30 00:57:05,249 INFO L136 LiptonReduction]: Total number of compositions: 160 [2023-08-30 00:57:05,260 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:57:05,268 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;@3ed33376, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:57:05,268 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-08-30 00:57:05,269 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 00:57:05,270 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:57:05,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:57:05,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:57:05,279 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 00:57:05,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:57:05,282 INFO L85 PathProgramCache]: Analyzing trace with hash 20468, now seen corresponding path program 1 times [2023-08-30 00:57:05,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:57:05,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075578626] [2023-08-30 00:57:05,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:57:05,295 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:05,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:57:05,298 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:57:05,299 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 (2)] Waiting until timeout for monitored process [2023-08-30 00:57:05,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:57:05,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:57:05,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:57:05,483 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 00:57:05,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 00:57:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:57:05,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:57:05,505 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:57:05,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075578626] [2023-08-30 00:57:05,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075578626] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:57:05,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:57:05,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:57:05,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427059197] [2023-08-30 00:57:05,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:57:05,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:57:05,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:57:05,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:57:05,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:57:05,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 304 [2023-08-30 00:57:05,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:05,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:57:05,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 304 [2023-08-30 00:57:05,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:57:05,767 INFO L130 PetriNetUnfolder]: 306/469 cut-off events. [2023-08-30 00:57:05,767 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 00:57:05,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 956 conditions, 469 events. 306/469 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 1986 event pairs, 174 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 772. Up to 465 conditions per place. [2023-08-30 00:57:05,774 INFO L137 encePairwiseOnDemand]: 301/304 looper letters, 29 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-30 00:57:05,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 134 flow [2023-08-30 00:57:05,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:57:05,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:57:05,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2023-08-30 00:57:05,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331140350877193 [2023-08-30 00:57:05,795 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 395 transitions. [2023-08-30 00:57:05,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 395 transitions. [2023-08-30 00:57:05,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:05,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 395 transitions. [2023-08-30 00:57:05,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:05,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:05,814 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:05,816 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 78 flow. Second operand 3 states and 395 transitions. [2023-08-30 00:57:05,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 134 flow [2023-08-30 00:57:05,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 126 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 00:57:05,822 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 68 flow [2023-08-30 00:57:05,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-08-30 00:57:05,828 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -4 predicate places. [2023-08-30 00:57:05,828 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 68 flow [2023-08-30 00:57:05,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:05,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:57:05,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:57:05,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 00:57:06,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:06,048 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 00:57:06,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:57:06,050 INFO L85 PathProgramCache]: Analyzing trace with hash 20513, now seen corresponding path program 1 times [2023-08-30 00:57:06,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:57:06,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858097349] [2023-08-30 00:57:06,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:57:06,051 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:06,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:57:06,052 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:57:06,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 00:57:06,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:57:06,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:57:06,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:57:06,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:57:06,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:57:06,167 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 00:57:06,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 00:57:06,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 00:57:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:57:06,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:57:06,200 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:57:06,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858097349] [2023-08-30 00:57:06,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858097349] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:57:06,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:57:06,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:57:06,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342332808] [2023-08-30 00:57:06,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:57:06,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:57:06,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:57:06,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:57:06,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:57:06,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 304 [2023-08-30 00:57:06,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:06,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:57:06,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 304 [2023-08-30 00:57:06,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:57:06,405 INFO L130 PetriNetUnfolder]: 234/368 cut-off events. [2023-08-30 00:57:06,405 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 00:57:06,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 741 conditions, 368 events. 234/368 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 1496 event pairs, 133 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 735. Up to 364 conditions per place. [2023-08-30 00:57:06,407 INFO L137 encePairwiseOnDemand]: 301/304 looper letters, 27 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-30 00:57:06,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 29 transitions, 120 flow [2023-08-30 00:57:06,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:57:06,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:57:06,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2023-08-30 00:57:06,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4309210526315789 [2023-08-30 00:57:06,409 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 393 transitions. [2023-08-30 00:57:06,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 393 transitions. [2023-08-30 00:57:06,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:06,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 393 transitions. [2023-08-30 00:57:06,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:06,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:06,412 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:06,412 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 68 flow. Second operand 3 states and 393 transitions. [2023-08-30 00:57:06,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 29 transitions, 120 flow [2023-08-30 00:57:06,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 119 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:57:06,413 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 65 flow [2023-08-30 00:57:06,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-08-30 00:57:06,415 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -5 predicate places. [2023-08-30 00:57:06,415 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 65 flow [2023-08-30 00:57:06,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:06,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:57:06,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:57:06,438 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 (3)] Ended with exit code 0 [2023-08-30 00:57:06,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:06,624 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 00:57:06,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:57:06,625 INFO L85 PathProgramCache]: Analyzing trace with hash 20466, now seen corresponding path program 1 times [2023-08-30 00:57:06,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:57:06,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39846598] [2023-08-30 00:57:06,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:57:06,625 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:06,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:57:06,626 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:57:06,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 00:57:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:57:06,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:57:06,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:57:06,773 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 00:57:06,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 00:57:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:57:06,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:57:06,793 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:57:06,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39846598] [2023-08-30 00:57:06,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39846598] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:57:06,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:57:06,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:57:06,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749957834] [2023-08-30 00:57:06,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:57:06,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:57:06,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:57:06,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:57:06,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:57:06,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 304 [2023-08-30 00:57:06,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:06,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:57:06,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 304 [2023-08-30 00:57:06,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:57:07,134 INFO L130 PetriNetUnfolder]: 467/734 cut-off events. [2023-08-30 00:57:07,134 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 00:57:07,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1475 conditions, 734 events. 467/734 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 3480 event pairs, 266 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 1468. Up to 365 conditions per place. [2023-08-30 00:57:07,137 INFO L137 encePairwiseOnDemand]: 301/304 looper letters, 52 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-30 00:57:07,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 55 transitions, 229 flow [2023-08-30 00:57:07,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:57:07,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:57:07,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 418 transitions. [2023-08-30 00:57:07,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-08-30 00:57:07,139 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 418 transitions. [2023-08-30 00:57:07,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 418 transitions. [2023-08-30 00:57:07,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:07,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 418 transitions. [2023-08-30 00:57:07,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:07,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:07,142 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:07,142 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 65 flow. Second operand 3 states and 418 transitions. [2023-08-30 00:57:07,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 55 transitions, 229 flow [2023-08-30 00:57:07,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 55 transitions, 228 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:57:07,144 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 76 flow [2023-08-30 00:57:07,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-08-30 00:57:07,144 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2023-08-30 00:57:07,145 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 76 flow [2023-08-30 00:57:07,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:07,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:57:07,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:57:07,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 00:57:07,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:07,352 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 00:57:07,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:57:07,353 INFO L85 PathProgramCache]: Analyzing trace with hash 20514, now seen corresponding path program 1 times [2023-08-30 00:57:07,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:57:07,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1983242318] [2023-08-30 00:57:07,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:57:07,354 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:07,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:57:07,355 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:57:07,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 00:57:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:57:07,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 00:57:07,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:57:07,423 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2023-08-30 00:57:07,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2023-08-30 00:57:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:57:07,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:57:07,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:57:07,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1983242318] [2023-08-30 00:57:07,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1983242318] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:57:07,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:57:07,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:57:07,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876591233] [2023-08-30 00:57:07,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:57:07,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:57:07,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:57:07,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:57:07,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:57:07,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 304 [2023-08-30 00:57:07,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:07,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:57:07,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 304 [2023-08-30 00:57:07,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:57:07,612 INFO L130 PetriNetUnfolder]: 323/532 cut-off events. [2023-08-30 00:57:07,613 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 00:57:07,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1077 conditions, 532 events. 323/532 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 2439 event pairs, 184 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 1068. Up to 524 conditions per place. [2023-08-30 00:57:07,615 INFO L137 encePairwiseOnDemand]: 301/304 looper letters, 26 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-30 00:57:07,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 126 flow [2023-08-30 00:57:07,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:57:07,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:57:07,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 382 transitions. [2023-08-30 00:57:07,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41885964912280704 [2023-08-30 00:57:07,617 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 382 transitions. [2023-08-30 00:57:07,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 382 transitions. [2023-08-30 00:57:07,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:07,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 382 transitions. [2023-08-30 00:57:07,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:07,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:07,620 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:07,620 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 76 flow. Second operand 3 states and 382 transitions. [2023-08-30 00:57:07,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 126 flow [2023-08-30 00:57:07,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 124 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:57:07,621 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 72 flow [2023-08-30 00:57:07,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-08-30 00:57:07,622 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -4 predicate places. [2023-08-30 00:57:07,622 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 72 flow [2023-08-30 00:57:07,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:07,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:57:07,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:57:07,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 00:57:07,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:07,830 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 00:57:07,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:57:07,830 INFO L85 PathProgramCache]: Analyzing trace with hash 636405, now seen corresponding path program 1 times [2023-08-30 00:57:07,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:57:07,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188562748] [2023-08-30 00:57:07,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:57:07,831 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:07,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:57:07,832 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:57:07,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 00:57:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:57:07,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:57:07,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:57:07,963 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 00:57:07,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 00:57:08,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:57:08,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:57:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:57:08,170 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:57:08,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188562748] [2023-08-30 00:57:08,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188562748] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:57:08,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:57:08,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:57:08,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230593150] [2023-08-30 00:57:08,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:57:08,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:57:08,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:57:08,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:57:08,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:57:08,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 304 [2023-08-30 00:57:08,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 72 flow. Second operand has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:08,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:57:08,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 304 [2023-08-30 00:57:08,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:57:08,994 INFO L130 PetriNetUnfolder]: 486/801 cut-off events. [2023-08-30 00:57:08,995 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:57:08,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1619 conditions, 801 events. 486/801 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 3947 event pairs, 276 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 1609. Up to 263 conditions per place. [2023-08-30 00:57:08,997 INFO L137 encePairwiseOnDemand]: 300/304 looper letters, 71 selfloop transitions, 7 changer transitions 0/79 dead transitions. [2023-08-30 00:57:08,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 79 transitions, 344 flow [2023-08-30 00:57:08,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:57:08,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:57:08,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 777 transitions. [2023-08-30 00:57:09,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42598684210526316 [2023-08-30 00:57:09,000 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 777 transitions. [2023-08-30 00:57:09,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 777 transitions. [2023-08-30 00:57:09,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:09,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 777 transitions. [2023-08-30 00:57:09,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 129.5) internal successors, (777), 6 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:09,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 304.0) internal successors, (2128), 7 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:09,005 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 304.0) internal successors, (2128), 7 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:09,005 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 72 flow. Second operand 6 states and 777 transitions. [2023-08-30 00:57:09,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 79 transitions, 344 flow [2023-08-30 00:57:09,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 79 transitions, 343 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:57:09,006 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 125 flow [2023-08-30 00:57:09,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=125, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-08-30 00:57:09,007 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-08-30 00:57:09,007 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 125 flow [2023-08-30 00:57:09,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:09,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:57:09,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 00:57:09,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 00:57:09,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:09,215 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 00:57:09,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:57:09,216 INFO L85 PathProgramCache]: Analyzing trace with hash 19729438, now seen corresponding path program 1 times [2023-08-30 00:57:09,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:57:09,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873684106] [2023-08-30 00:57:09,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:57:09,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:09,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:57:09,219 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:57:09,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 00:57:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:57:09,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:57:09,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:57:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:57:09,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:57:09,286 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:57:09,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873684106] [2023-08-30 00:57:09,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873684106] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:57:09,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:57:09,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:57:09,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773204990] [2023-08-30 00:57:09,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:57:09,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:57:09,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:57:09,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:57:09,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:57:09,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 304 [2023-08-30 00:57:09,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:09,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:57:09,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 304 [2023-08-30 00:57:09,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:57:09,484 INFO L130 PetriNetUnfolder]: 450/861 cut-off events. [2023-08-30 00:57:09,486 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-30 00:57:09,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1765 conditions, 861 events. 450/861 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 5158 event pairs, 195 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 1750. Up to 535 conditions per place. [2023-08-30 00:57:09,489 INFO L137 encePairwiseOnDemand]: 299/304 looper letters, 44 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-30 00:57:09,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 47 transitions, 247 flow [2023-08-30 00:57:09,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:57:09,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:57:09,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 412 transitions. [2023-08-30 00:57:09,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4517543859649123 [2023-08-30 00:57:09,491 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 412 transitions. [2023-08-30 00:57:09,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 412 transitions. [2023-08-30 00:57:09,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:09,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 412 transitions. [2023-08-30 00:57:09,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:09,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:09,494 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:09,495 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 125 flow. Second operand 3 states and 412 transitions. [2023-08-30 00:57:09,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 47 transitions, 247 flow [2023-08-30 00:57:09,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 47 transitions, 237 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 00:57:09,497 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 131 flow [2023-08-30 00:57:09,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-08-30 00:57:09,499 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 6 predicate places. [2023-08-30 00:57:09,499 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 131 flow [2023-08-30 00:57:09,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:09,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:57:09,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 00:57:09,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 00:57:09,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:09,706 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 00:57:09,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:57:09,707 INFO L85 PathProgramCache]: Analyzing trace with hash 19729451, now seen corresponding path program 1 times [2023-08-30 00:57:09,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:57:09,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416849044] [2023-08-30 00:57:09,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:57:09,708 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:09,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:57:09,709 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:57:09,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 00:57:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:57:09,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:57:09,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:57:09,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:57:09,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:57:09,802 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 00:57:09,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 00:57:09,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 00:57:09,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:57:09,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:57:09,823 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:57:09,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416849044] [2023-08-30 00:57:09,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1416849044] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:57:09,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:57:09,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:57:09,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412281545] [2023-08-30 00:57:09,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:57:09,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:57:09,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:57:09,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:57:09,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:57:09,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 304 [2023-08-30 00:57:09,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:09,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:57:09,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 304 [2023-08-30 00:57:09,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:57:10,009 INFO L130 PetriNetUnfolder]: 411/780 cut-off events. [2023-08-30 00:57:10,009 INFO L131 PetriNetUnfolder]: For 94/94 co-relation queries the response was YES. [2023-08-30 00:57:10,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1784 conditions, 780 events. 411/780 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 4460 event pairs, 339 based on Foata normal form. 0/438 useless extension candidates. Maximal degree in co-relation 1767. Up to 774 conditions per place. [2023-08-30 00:57:10,012 INFO L137 encePairwiseOnDemand]: 301/304 looper letters, 30 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-08-30 00:57:10,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 32 transitions, 189 flow [2023-08-30 00:57:10,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:57:10,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:57:10,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 389 transitions. [2023-08-30 00:57:10,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42653508771929827 [2023-08-30 00:57:10,014 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 389 transitions. [2023-08-30 00:57:10,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 389 transitions. [2023-08-30 00:57:10,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:10,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 389 transitions. [2023-08-30 00:57:10,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:10,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:10,017 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:10,017 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 131 flow. Second operand 3 states and 389 transitions. [2023-08-30 00:57:10,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 32 transitions, 189 flow [2023-08-30 00:57:10,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 32 transitions, 187 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:57:10,020 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 127 flow [2023-08-30 00:57:10,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2023-08-30 00:57:10,021 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2023-08-30 00:57:10,021 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 127 flow [2023-08-30 00:57:10,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:10,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:57:10,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 00:57:10,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 00:57:10,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:10,231 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 00:57:10,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:57:10,232 INFO L85 PathProgramCache]: Analyzing trace with hash 19729449, now seen corresponding path program 1 times [2023-08-30 00:57:10,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:57:10,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308419440] [2023-08-30 00:57:10,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:57:10,232 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:10,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:57:10,233 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:57:10,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 00:57:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:57:10,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 00:57:10,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:57:10,299 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 00:57:10,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2023-08-30 00:57:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:57:10,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:57:10,318 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:57:10,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308419440] [2023-08-30 00:57:10,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308419440] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:57:10,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:57:10,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:57:10,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848335243] [2023-08-30 00:57:10,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:57:10,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:57:10,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:57:10,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:57:10,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:57:10,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 304 [2023-08-30 00:57:10,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:10,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:57:10,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 304 [2023-08-30 00:57:10,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:57:10,463 INFO L130 PetriNetUnfolder]: 372/699 cut-off events. [2023-08-30 00:57:10,463 INFO L131 PetriNetUnfolder]: For 88/88 co-relation queries the response was YES. [2023-08-30 00:57:10,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1596 conditions, 699 events. 372/699 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 3850 event pairs, 303 based on Foata normal form. 0/423 useless extension candidates. Maximal degree in co-relation 1578. Up to 693 conditions per place. [2023-08-30 00:57:10,465 INFO L137 encePairwiseOnDemand]: 301/304 looper letters, 28 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-30 00:57:10,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 30 transitions, 181 flow [2023-08-30 00:57:10,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:57:10,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:57:10,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-08-30 00:57:10,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144736842105263 [2023-08-30 00:57:10,467 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-08-30 00:57:10,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-08-30 00:57:10,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:10,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-08-30 00:57:10,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:10,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:10,469 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:10,469 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 127 flow. Second operand 3 states and 378 transitions. [2023-08-30 00:57:10,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 30 transitions, 181 flow [2023-08-30 00:57:10,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 30 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:57:10,471 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 124 flow [2023-08-30 00:57:10,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2023-08-30 00:57:10,471 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-08-30 00:57:10,471 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 124 flow [2023-08-30 00:57:10,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:10,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:57:10,472 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:57:10,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 00:57:10,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:10,679 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 00:57:10,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:57:10,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1781217458, now seen corresponding path program 2 times [2023-08-30 00:57:10,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:57:10,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544514013] [2023-08-30 00:57:10,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:57:10,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:10,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:57:10,681 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:57:10,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 00:57:10,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:57:10,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:57:10,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:57:10,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:57:10,809 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 00:57:10,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 00:57:10,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:57:10,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:57:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:57:11,479 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:57:11,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544514013] [2023-08-30 00:57:11,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544514013] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:57:11,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:57:11,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:57:11,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124569249] [2023-08-30 00:57:11,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:57:11,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:57:11,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:57:11,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:57:11,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:57:13,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 304 [2023-08-30 00:57:13,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 124 flow. Second operand has 12 states, 12 states have (on average 118.0) internal successors, (1416), 12 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:13,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:57:13,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 304 [2023-08-30 00:57:13,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:57:16,049 INFO L130 PetriNetUnfolder]: 1232/2314 cut-off events. [2023-08-30 00:57:16,049 INFO L131 PetriNetUnfolder]: For 288/288 co-relation queries the response was YES. [2023-08-30 00:57:16,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5222 conditions, 2314 events. 1232/2314 cut-off events. For 288/288 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14646 event pairs, 1010 based on Foata normal form. 6/1436 useless extension candidates. Maximal degree in co-relation 5203. Up to 521 conditions per place. [2023-08-30 00:57:16,059 INFO L137 encePairwiseOnDemand]: 300/304 looper letters, 202 selfloop transitions, 12 changer transitions 0/215 dead transitions. [2023-08-30 00:57:16,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 215 transitions, 1104 flow [2023-08-30 00:57:16,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 00:57:16,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 00:57:16,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1614 transitions. [2023-08-30 00:57:16,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44243421052631576 [2023-08-30 00:57:16,063 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1614 transitions. [2023-08-30 00:57:16,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1614 transitions. [2023-08-30 00:57:16,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:16,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1614 transitions. [2023-08-30 00:57:16,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 134.5) internal successors, (1614), 12 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:16,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 304.0) internal successors, (3952), 13 states have internal predecessors, (3952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:16,081 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 304.0) internal successors, (3952), 13 states have internal predecessors, (3952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:16,081 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 124 flow. Second operand 12 states and 1614 transitions. [2023-08-30 00:57:16,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 215 transitions, 1104 flow [2023-08-30 00:57:16,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 215 transitions, 1103 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:57:16,087 INFO L231 Difference]: Finished difference. Result has 58 places, 37 transitions, 221 flow [2023-08-30 00:57:16,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=221, PETRI_PLACES=58, PETRI_TRANSITIONS=37} [2023-08-30 00:57:16,087 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 21 predicate places. [2023-08-30 00:57:16,087 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 37 transitions, 221 flow [2023-08-30 00:57:16,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 118.0) internal successors, (1416), 12 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:16,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:57:16,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:57:16,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-08-30 00:57:16,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:16,295 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 00:57:16,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:57:16,296 INFO L85 PathProgramCache]: Analyzing trace with hash -650030388, now seen corresponding path program 1 times [2023-08-30 00:57:16,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:57:16,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498992082] [2023-08-30 00:57:16,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:57:16,296 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:16,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:57:16,297 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:57:16,323 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 (11)] Waiting until timeout for monitored process [2023-08-30 00:57:16,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:57:16,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 00:57:16,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:57:16,398 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 00:57:16,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 00:57:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:57:16,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:57:16,427 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:57:16,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498992082] [2023-08-30 00:57:16,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498992082] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:57:16,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:57:16,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:57:16,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637450026] [2023-08-30 00:57:16,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:57:16,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:57:16,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:57:16,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:57:16,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:57:16,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 304 [2023-08-30 00:57:16,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 37 transitions, 221 flow. Second operand has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:16,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:57:16,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 304 [2023-08-30 00:57:16,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:57:16,716 INFO L130 PetriNetUnfolder]: 712/1394 cut-off events. [2023-08-30 00:57:16,717 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-08-30 00:57:16,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3201 conditions, 1394 events. 712/1394 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8240 event pairs, 550 based on Foata normal form. 0/994 useless extension candidates. Maximal degree in co-relation 3174. Up to 1361 conditions per place. [2023-08-30 00:57:16,723 INFO L137 encePairwiseOnDemand]: 299/304 looper letters, 28 selfloop transitions, 5 changer transitions 0/34 dead transitions. [2023-08-30 00:57:16,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 34 transitions, 279 flow [2023-08-30 00:57:16,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:57:16,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:57:16,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 490 transitions. [2023-08-30 00:57:16,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4029605263157895 [2023-08-30 00:57:16,725 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 490 transitions. [2023-08-30 00:57:16,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 490 transitions. [2023-08-30 00:57:16,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:16,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 490 transitions. [2023-08-30 00:57:16,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:16,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 304.0) internal successors, (1520), 5 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:16,727 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 304.0) internal successors, (1520), 5 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:16,728 INFO L175 Difference]: Start difference. First operand has 58 places, 37 transitions, 221 flow. Second operand 4 states and 490 transitions. [2023-08-30 00:57:16,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 34 transitions, 279 flow [2023-08-30 00:57:16,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 34 transitions, 254 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 00:57:16,730 INFO L231 Difference]: Finished difference. Result has 54 places, 34 transitions, 198 flow [2023-08-30 00:57:16,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=54, PETRI_TRANSITIONS=34} [2023-08-30 00:57:16,731 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 17 predicate places. [2023-08-30 00:57:16,731 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 34 transitions, 198 flow [2023-08-30 00:57:16,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:16,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:57:16,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:57:16,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 00:57:16,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:16,939 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 00:57:16,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:57:16,939 INFO L85 PathProgramCache]: Analyzing trace with hash -650030387, now seen corresponding path program 1 times [2023-08-30 00:57:16,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:57:16,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763449295] [2023-08-30 00:57:16,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:57:16,940 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:16,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:57:16,941 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:57:16,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 00:57:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:57:17,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 00:57:17,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:57:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:57:17,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:57:17,011 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:57:17,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763449295] [2023-08-30 00:57:17,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763449295] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:57:17,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:57:17,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:57:17,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670044209] [2023-08-30 00:57:17,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:57:17,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:57:17,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:57:17,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:57:17,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:57:17,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 304 [2023-08-30 00:57:17,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 34 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:17,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:57:17,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 304 [2023-08-30 00:57:17,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:57:17,233 INFO L130 PetriNetUnfolder]: 712/1374 cut-off events. [2023-08-30 00:57:17,233 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2023-08-30 00:57:17,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3175 conditions, 1374 events. 712/1374 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 7370 event pairs, 370 based on Foata normal form. 0/1074 useless extension candidates. Maximal degree in co-relation 3147. Up to 995 conditions per place. [2023-08-30 00:57:17,239 INFO L137 encePairwiseOnDemand]: 301/304 looper letters, 40 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-30 00:57:17,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 42 transitions, 300 flow [2023-08-30 00:57:17,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:57:17,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:57:17,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 402 transitions. [2023-08-30 00:57:17,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4407894736842105 [2023-08-30 00:57:17,241 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 402 transitions. [2023-08-30 00:57:17,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 402 transitions. [2023-08-30 00:57:17,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:17,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 402 transitions. [2023-08-30 00:57:17,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:17,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:17,243 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:17,244 INFO L175 Difference]: Start difference. First operand has 54 places, 34 transitions, 198 flow. Second operand 3 states and 402 transitions. [2023-08-30 00:57:17,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 42 transitions, 300 flow [2023-08-30 00:57:17,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 42 transitions, 294 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:57:17,245 INFO L231 Difference]: Finished difference. Result has 55 places, 34 transitions, 200 flow [2023-08-30 00:57:17,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=55, PETRI_TRANSITIONS=34} [2023-08-30 00:57:17,246 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 18 predicate places. [2023-08-30 00:57:17,246 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 34 transitions, 200 flow [2023-08-30 00:57:17,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:17,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:57:17,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:57:17,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 00:57:17,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:17,454 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 00:57:17,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:57:17,454 INFO L85 PathProgramCache]: Analyzing trace with hash -650030386, now seen corresponding path program 1 times [2023-08-30 00:57:17,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:57:17,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805881958] [2023-08-30 00:57:17,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:57:17,455 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:17,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:57:17,456 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:57:17,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 00:57:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:57:17,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:57:17,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:57:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:57:17,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:57:17,558 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:57:17,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805881958] [2023-08-30 00:57:17,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805881958] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:57:17,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:57:17,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:57:17,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915569709] [2023-08-30 00:57:17,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:57:17,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:57:17,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:57:17,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:57:17,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:57:17,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 304 [2023-08-30 00:57:17,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 34 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:17,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:57:17,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 304 [2023-08-30 00:57:17,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:57:17,789 INFO L130 PetriNetUnfolder]: 596/1178 cut-off events. [2023-08-30 00:57:17,790 INFO L131 PetriNetUnfolder]: For 384/422 co-relation queries the response was YES. [2023-08-30 00:57:17,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2933 conditions, 1178 events. 596/1178 cut-off events. For 384/422 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6646 event pairs, 450 based on Foata normal form. 42/1020 useless extension candidates. Maximal degree in co-relation 2905. Up to 1130 conditions per place. [2023-08-30 00:57:17,794 INFO L137 encePairwiseOnDemand]: 299/304 looper letters, 41 selfloop transitions, 3 changer transitions 0/45 dead transitions. [2023-08-30 00:57:17,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 45 transitions, 319 flow [2023-08-30 00:57:17,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:57:17,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:57:17,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 517 transitions. [2023-08-30 00:57:17,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251644736842105 [2023-08-30 00:57:17,796 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 517 transitions. [2023-08-30 00:57:17,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 517 transitions. [2023-08-30 00:57:17,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:17,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 517 transitions. [2023-08-30 00:57:17,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:17,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 304.0) internal successors, (1520), 5 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:17,799 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 304.0) internal successors, (1520), 5 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:17,799 INFO L175 Difference]: Start difference. First operand has 55 places, 34 transitions, 200 flow. Second operand 4 states and 517 transitions. [2023-08-30 00:57:17,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 45 transitions, 319 flow [2023-08-30 00:57:17,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 45 transitions, 315 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:57:17,801 INFO L231 Difference]: Finished difference. Result has 58 places, 35 transitions, 219 flow [2023-08-30 00:57:17,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=219, PETRI_PLACES=58, PETRI_TRANSITIONS=35} [2023-08-30 00:57:17,802 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 21 predicate places. [2023-08-30 00:57:17,802 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 35 transitions, 219 flow [2023-08-30 00:57:17,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:17,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:57:17,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:57:17,823 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 [2023-08-30 00:57:18,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:18,010 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 00:57:18,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:57:18,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1975109973, now seen corresponding path program 1 times [2023-08-30 00:57:18,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:57:18,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1480324454] [2023-08-30 00:57:18,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:57:18,011 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:18,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:57:18,012 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:57:18,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 00:57:18,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:57:18,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:57:18,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:57:18,153 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 00:57:18,153 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 00:57:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:57:18,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:57:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:57:18,738 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:57:18,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1480324454] [2023-08-30 00:57:18,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1480324454] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:57:18,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:57:18,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:57:18,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948196175] [2023-08-30 00:57:18,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:57:18,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:57:18,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:57:18,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:57:18,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:57:22,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 304 [2023-08-30 00:57:22,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 35 transitions, 219 flow. Second operand has 8 states, 8 states have (on average 113.75) internal successors, (910), 8 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:22,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:57:22,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 304 [2023-08-30 00:57:22,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:57:25,041 INFO L130 PetriNetUnfolder]: 494/998 cut-off events. [2023-08-30 00:57:25,041 INFO L131 PetriNetUnfolder]: For 435/475 co-relation queries the response was YES. [2023-08-30 00:57:25,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2599 conditions, 998 events. 494/998 cut-off events. For 435/475 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5561 event pairs, 366 based on Foata normal form. 94/1044 useless extension candidates. Maximal degree in co-relation 2569. Up to 745 conditions per place. [2023-08-30 00:57:25,045 INFO L137 encePairwiseOnDemand]: 297/304 looper letters, 59 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2023-08-30 00:57:25,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 72 transitions, 472 flow [2023-08-30 00:57:25,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 00:57:25,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 00:57:25,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1187 transitions. [2023-08-30 00:57:25,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904605263157895 [2023-08-30 00:57:25,049 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1187 transitions. [2023-08-30 00:57:25,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1187 transitions. [2023-08-30 00:57:25,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:25,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1187 transitions. [2023-08-30 00:57:25,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 118.7) internal successors, (1187), 10 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:25,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 304.0) internal successors, (3344), 11 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:25,055 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 304.0) internal successors, (3344), 11 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:25,055 INFO L175 Difference]: Start difference. First operand has 58 places, 35 transitions, 219 flow. Second operand 10 states and 1187 transitions. [2023-08-30 00:57:25,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 72 transitions, 472 flow [2023-08-30 00:57:25,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 72 transitions, 462 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 00:57:25,059 INFO L231 Difference]: Finished difference. Result has 67 places, 36 transitions, 257 flow [2023-08-30 00:57:25,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=257, PETRI_PLACES=67, PETRI_TRANSITIONS=36} [2023-08-30 00:57:25,060 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 30 predicate places. [2023-08-30 00:57:25,060 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 36 transitions, 257 flow [2023-08-30 00:57:25,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 113.75) internal successors, (910), 8 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:25,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:57:25,061 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:57:25,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 00:57:25,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:25,268 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 00:57:25,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:57:25,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1699340814, now seen corresponding path program 2 times [2023-08-30 00:57:25,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:57:25,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520402971] [2023-08-30 00:57:25,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:57:25,270 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:25,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:57:25,271 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:57:25,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 00:57:25,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 00:57:25,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:57:25,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 00:57:25,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:57:25,403 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 00:57:25,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 00:57:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 00:57:25,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:57:25,472 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:57:25,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520402971] [2023-08-30 00:57:25,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520402971] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:57:25,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:57:25,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:57:25,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531427912] [2023-08-30 00:57:25,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:57:25,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:57:25,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:57:25,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:57:25,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:57:25,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 304 [2023-08-30 00:57:25,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 36 transitions, 257 flow. Second operand has 4 states, 4 states have (on average 119.75) internal successors, (479), 4 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:25,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:57:25,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 304 [2023-08-30 00:57:25,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:57:25,726 INFO L130 PetriNetUnfolder]: 290/638 cut-off events. [2023-08-30 00:57:25,726 INFO L131 PetriNetUnfolder]: For 1071/1099 co-relation queries the response was YES. [2023-08-30 00:57:25,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 638 events. 290/638 cut-off events. For 1071/1099 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3325 event pairs, 198 based on Foata normal form. 160/798 useless extension candidates. Maximal degree in co-relation 1645. Up to 605 conditions per place. [2023-08-30 00:57:25,729 INFO L137 encePairwiseOnDemand]: 299/304 looper letters, 25 selfloop transitions, 7 changer transitions 0/33 dead transitions. [2023-08-30 00:57:25,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 33 transitions, 297 flow [2023-08-30 00:57:25,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:57:25,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:57:25,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 491 transitions. [2023-08-30 00:57:25,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037828947368421 [2023-08-30 00:57:25,730 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 491 transitions. [2023-08-30 00:57:25,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 491 transitions. [2023-08-30 00:57:25,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:25,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 491 transitions. [2023-08-30 00:57:25,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.75) internal successors, (491), 4 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:25,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 304.0) internal successors, (1520), 5 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:25,733 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 304.0) internal successors, (1520), 5 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:25,733 INFO L175 Difference]: Start difference. First operand has 67 places, 36 transitions, 257 flow. Second operand 4 states and 491 transitions. [2023-08-30 00:57:25,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 33 transitions, 297 flow [2023-08-30 00:57:25,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 33 transitions, 242 flow, removed 11 selfloop flow, removed 12 redundant places. [2023-08-30 00:57:25,735 INFO L231 Difference]: Finished difference. Result has 55 places, 33 transitions, 192 flow [2023-08-30 00:57:25,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=55, PETRI_TRANSITIONS=33} [2023-08-30 00:57:25,735 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 18 predicate places. [2023-08-30 00:57:25,735 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 33 transitions, 192 flow [2023-08-30 00:57:25,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.75) internal successors, (479), 4 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:25,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:57:25,736 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 00:57:25,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 00:57:25,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:25,942 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 00:57:25,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:57:25,943 INFO L85 PathProgramCache]: Analyzing trace with hash -2125848110, now seen corresponding path program 3 times [2023-08-30 00:57:25,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:57:25,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608447528] [2023-08-30 00:57:25,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:57:25,943 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:25,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:57:25,951 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:57:25,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 00:57:26,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 00:57:26,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:57:26,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:57:26,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:57:26,158 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 00:57:26,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 00:57:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:57:26,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:57:28,096 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:57:28,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:57:28,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608447528] [2023-08-30 00:57:28,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608447528] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:57:28,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:57:28,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 00:57:28,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631850658] [2023-08-30 00:57:28,097 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:57:28,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 00:57:28,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:57:28,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 00:57:28,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 00:57:35,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 304 [2023-08-30 00:57:35,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 33 transitions, 192 flow. Second operand has 24 states, 24 states have (on average 118.0) internal successors, (2832), 24 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:35,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:57:35,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 304 [2023-08-30 00:57:35,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:57:47,106 INFO L130 PetriNetUnfolder]: 662/1442 cut-off events. [2023-08-30 00:57:47,106 INFO L131 PetriNetUnfolder]: For 830/830 co-relation queries the response was YES. [2023-08-30 00:57:47,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3591 conditions, 1442 events. 662/1442 cut-off events. For 830/830 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 7999 event pairs, 450 based on Foata normal form. 12/1452 useless extension candidates. Maximal degree in co-relation 3566. Up to 337 conditions per place. [2023-08-30 00:57:47,111 INFO L137 encePairwiseOnDemand]: 300/304 looper letters, 307 selfloop transitions, 24 changer transitions 0/332 dead transitions. [2023-08-30 00:57:47,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 332 transitions, 1904 flow [2023-08-30 00:57:47,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 00:57:47,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 00:57:47,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3130 transitions. [2023-08-30 00:57:47,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4290021929824561 [2023-08-30 00:57:47,117 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3130 transitions. [2023-08-30 00:57:47,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3130 transitions. [2023-08-30 00:57:47,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:47,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3130 transitions. [2023-08-30 00:57:47,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 130.41666666666666) internal successors, (3130), 24 states have internal predecessors, (3130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:47,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 304.0) internal successors, (7600), 25 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:47,128 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 304.0) internal successors, (7600), 25 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:47,128 INFO L175 Difference]: Start difference. First operand has 55 places, 33 transitions, 192 flow. Second operand 24 states and 3130 transitions. [2023-08-30 00:57:47,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 332 transitions, 1904 flow [2023-08-30 00:57:47,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 332 transitions, 1879 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:57:47,133 INFO L231 Difference]: Finished difference. Result has 89 places, 46 transitions, 371 flow [2023-08-30 00:57:47,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=371, PETRI_PLACES=89, PETRI_TRANSITIONS=46} [2023-08-30 00:57:47,133 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 52 predicate places. [2023-08-30 00:57:47,133 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 46 transitions, 371 flow [2023-08-30 00:57:47,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 118.0) internal successors, (2832), 24 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:47,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:57:47,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:57:47,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 00:57:47,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:47,343 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 00:57:47,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:57:47,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1203095455, now seen corresponding path program 1 times [2023-08-30 00:57:47,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:57:47,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959890144] [2023-08-30 00:57:47,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:57:47,344 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:47,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:57:47,345 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:57:47,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 00:57:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:57:47,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:57:47,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:57:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:57:47,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:57:47,419 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:57:47,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959890144] [2023-08-30 00:57:47,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959890144] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:57:47,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:57:47,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:57:47,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939171971] [2023-08-30 00:57:47,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:57:47,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:57:47,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:57:47,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:57:47,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:57:47,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 304 [2023-08-30 00:57:47,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 46 transitions, 371 flow. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:47,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:57:47,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 304 [2023-08-30 00:57:47,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:57:47,664 INFO L130 PetriNetUnfolder]: 998/2029 cut-off events. [2023-08-30 00:57:47,664 INFO L131 PetriNetUnfolder]: For 694/694 co-relation queries the response was YES. [2023-08-30 00:57:47,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5049 conditions, 2029 events. 998/2029 cut-off events. For 694/694 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 11535 event pairs, 450 based on Foata normal form. 43/1986 useless extension candidates. Maximal degree in co-relation 5011. Up to 1271 conditions per place. [2023-08-30 00:57:47,670 INFO L137 encePairwiseOnDemand]: 301/304 looper letters, 46 selfloop transitions, 2 changer transitions 5/54 dead transitions. [2023-08-30 00:57:47,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 54 transitions, 499 flow [2023-08-30 00:57:47,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:57:47,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:57:47,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-08-30 00:57:47,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418859649122807 [2023-08-30 00:57:47,672 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-08-30 00:57:47,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-08-30 00:57:47,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:47,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-08-30 00:57:47,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:47,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:47,674 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:47,675 INFO L175 Difference]: Start difference. First operand has 89 places, 46 transitions, 371 flow. Second operand 3 states and 403 transitions. [2023-08-30 00:57:47,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 54 transitions, 499 flow [2023-08-30 00:57:47,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 54 transitions, 451 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-08-30 00:57:47,678 INFO L231 Difference]: Finished difference. Result has 82 places, 46 transitions, 329 flow [2023-08-30 00:57:47,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=329, PETRI_PLACES=82, PETRI_TRANSITIONS=46} [2023-08-30 00:57:47,679 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 45 predicate places. [2023-08-30 00:57:47,679 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 46 transitions, 329 flow [2023-08-30 00:57:47,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:47,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:57:47,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:57:47,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 00:57:47,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:47,886 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 00:57:47,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:57:47,886 INFO L85 PathProgramCache]: Analyzing trace with hash -540375072, now seen corresponding path program 1 times [2023-08-30 00:57:47,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:57:47,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1158192748] [2023-08-30 00:57:47,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:57:47,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:47,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:57:47,888 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:57:47,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 00:57:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:57:47,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 00:57:47,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:57:48,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-08-30 00:57:48,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 00:57:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:57:48,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:57:48,227 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 166 treesize of output 162 [2023-08-30 00:57:48,328 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 00:57:48,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 258 treesize of output 166 [2023-08-30 00:57:48,335 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 92 treesize of output 88 [2023-08-30 00:57:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:57:50,157 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:57:50,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1158192748] [2023-08-30 00:57:50,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1158192748] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:57:50,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:57:50,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:57:50,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101263404] [2023-08-30 00:57:50,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:57:50,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:57:50,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:57:50,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:57:50,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:57:50,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 304 [2023-08-30 00:57:50,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 46 transitions, 329 flow. Second operand has 10 states, 10 states have (on average 116.2) internal successors, (1162), 10 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:50,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:57:50,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 304 [2023-08-30 00:57:50,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:57:51,159 INFO L130 PetriNetUnfolder]: 1383/2687 cut-off events. [2023-08-30 00:57:51,159 INFO L131 PetriNetUnfolder]: For 649/649 co-relation queries the response was YES. [2023-08-30 00:57:51,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6950 conditions, 2687 events. 1383/2687 cut-off events. For 649/649 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 14935 event pairs, 60 based on Foata normal form. 20/2707 useless extension candidates. Maximal degree in co-relation 6910. Up to 721 conditions per place. [2023-08-30 00:57:51,168 INFO L137 encePairwiseOnDemand]: 299/304 looper letters, 50 selfloop transitions, 5 changer transitions 16/71 dead transitions. [2023-08-30 00:57:51,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 71 transitions, 536 flow [2023-08-30 00:57:51,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:57:51,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:57:51,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 723 transitions. [2023-08-30 00:57:51,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3963815789473684 [2023-08-30 00:57:51,171 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 723 transitions. [2023-08-30 00:57:51,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 723 transitions. [2023-08-30 00:57:51,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:51,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 723 transitions. [2023-08-30 00:57:51,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 120.5) internal successors, (723), 6 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:51,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 304.0) internal successors, (2128), 7 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:51,174 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 304.0) internal successors, (2128), 7 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:51,174 INFO L175 Difference]: Start difference. First operand has 82 places, 46 transitions, 329 flow. Second operand 6 states and 723 transitions. [2023-08-30 00:57:51,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 71 transitions, 536 flow [2023-08-30 00:57:51,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 71 transitions, 532 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 00:57:51,180 INFO L231 Difference]: Finished difference. Result has 84 places, 47 transitions, 347 flow [2023-08-30 00:57:51,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=347, PETRI_PLACES=84, PETRI_TRANSITIONS=47} [2023-08-30 00:57:51,180 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 47 predicate places. [2023-08-30 00:57:51,181 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 47 transitions, 347 flow [2023-08-30 00:57:51,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 116.2) internal successors, (1162), 10 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:51,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:57:51,181 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:57:51,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 00:57:51,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:51,389 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 00:57:51,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:57:51,389 INFO L85 PathProgramCache]: Analyzing trace with hash -702120888, now seen corresponding path program 2 times [2023-08-30 00:57:51,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:57:51,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1756564547] [2023-08-30 00:57:51,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:57:51,390 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 [2023-08-30 00:57:51,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:57:51,391 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:57:51,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 00:57:51,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:57:51,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:57:51,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 00:57:51,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:57:51,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2023-08-30 00:57:51,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 00:57:51,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:57:51,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:57:51,961 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 00:57:51,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 328 treesize of output 188 [2023-08-30 00:57:51,968 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 188 treesize of output 184 [2023-08-30 00:57:51,975 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 184 treesize of output 180 [2023-08-30 00:57:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:57:52,330 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:57:52,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1756564547] [2023-08-30 00:57:52,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1756564547] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:57:52,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:57:52,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2023-08-30 00:57:52,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144659923] [2023-08-30 00:57:52,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:57:52,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 00:57:52,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:57:52,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 00:57:52,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-08-30 00:57:52,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 304 [2023-08-30 00:57:52,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 47 transitions, 347 flow. Second operand has 13 states, 13 states have (on average 114.23076923076923) internal successors, (1485), 13 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:52,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:57:52,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 304 [2023-08-30 00:57:52,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:57:54,102 INFO L130 PetriNetUnfolder]: 2719/5282 cut-off events. [2023-08-30 00:57:54,102 INFO L131 PetriNetUnfolder]: For 3555/3555 co-relation queries the response was YES. [2023-08-30 00:57:54,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13879 conditions, 5282 events. 2719/5282 cut-off events. For 3555/3555 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 34372 event pairs, 820 based on Foata normal form. 168/5450 useless extension candidates. Maximal degree in co-relation 13838. Up to 2015 conditions per place. [2023-08-30 00:57:54,141 INFO L137 encePairwiseOnDemand]: 298/304 looper letters, 56 selfloop transitions, 9 changer transitions 29/94 dead transitions. [2023-08-30 00:57:54,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 94 transitions, 688 flow [2023-08-30 00:57:54,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 00:57:54,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 00:57:54,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1189 transitions. [2023-08-30 00:57:54,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39111842105263156 [2023-08-30 00:57:54,145 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1189 transitions. [2023-08-30 00:57:54,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1189 transitions. [2023-08-30 00:57:54,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:54,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1189 transitions. [2023-08-30 00:57:54,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 118.9) internal successors, (1189), 10 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:54,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 304.0) internal successors, (3344), 11 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:54,149 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 304.0) internal successors, (3344), 11 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:54,149 INFO L175 Difference]: Start difference. First operand has 84 places, 47 transitions, 347 flow. Second operand 10 states and 1189 transitions. [2023-08-30 00:57:54,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 94 transitions, 688 flow [2023-08-30 00:57:54,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 94 transitions, 670 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-30 00:57:54,160 INFO L231 Difference]: Finished difference. Result has 94 places, 51 transitions, 409 flow [2023-08-30 00:57:54,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=409, PETRI_PLACES=94, PETRI_TRANSITIONS=51} [2023-08-30 00:57:54,160 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 57 predicate places. [2023-08-30 00:57:54,160 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 51 transitions, 409 flow [2023-08-30 00:57:54,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 114.23076923076923) internal successors, (1485), 13 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:54,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:57:54,161 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:57:54,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 00:57:54,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:54,369 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 00:57:54,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:57:54,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1517803675, now seen corresponding path program 3 times [2023-08-30 00:57:54,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:57:54,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497813087] [2023-08-30 00:57:54,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:57:54,369 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:54,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:57:54,370 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:57:54,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 00:57:54,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 00:57:54,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:57:54,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:57:54,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:57:54,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-08-30 00:57:54,963 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 20 treesize of output 16 [2023-08-30 00:57:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 00:57:55,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:58:05,269 INFO L321 Elim1Store]: treesize reduction 888, result has 19.1 percent of original size [2023-08-30 00:58:05,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 676 treesize of output 532 [2023-08-30 00:58:05,292 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 285 treesize of output 277 [2023-08-30 00:58:05,326 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 277 treesize of output 269 [2023-08-30 00:59:55,937 WARN L222 SmtUtils]: Spent 5.83s on a formula simplification. DAG size of input: 3398 DAG size of output: 3399 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 01:01:39,482 WARN L222 SmtUtils]: Spent 23.83s on a formula simplification. DAG size of input: 5649 DAG size of output: 5808 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 01:05:03,960 WARN L222 SmtUtils]: Spent 58.63s on a formula simplification. DAG size of input: 9973 DAG size of output: 9976 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 01:05:21,596 WARN L222 SmtUtils]: Spent 11.96s on a formula simplification. DAG size of input: 9439 DAG size of output: 9439 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15