./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1-dsl.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1-dsl.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 2b8fef41c3119c5f4fc9586ebd31a4ff7152be41d9f2f8da139e8cd34cf0da86 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 05:55:02,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 05:55:02,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 05:55:03,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 05:55:03,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 05:55:03,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 05:55:03,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 05:55:03,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 05:55:03,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 05:55:03,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 05:55:03,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 05:55:03,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 05:55:03,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 05:55:03,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 05:55:03,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 05:55:03,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 05:55:03,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 05:55:03,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 05:55:03,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 05:55:03,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 05:55:03,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 05:55:03,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 05:55:03,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 05:55:03,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 05:55:03,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 05:55:03,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 05:55:03,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 05:55:03,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 05:55:03,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 05:55:03,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 05:55:03,057 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 05:55:03,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 05:55:03,068 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 05:55:03,068 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 05:55:03,069 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 05:55:03,069 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 05:55:03,070 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 05:55:03,070 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 05:55:03,070 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 05:55:03,071 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 05:55:03,071 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 05:55:03,073 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 05:55:03,096 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 05:55:03,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 05:55:03,098 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 05:55:03,099 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 05:55:03,099 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 05:55:03,100 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 05:55:03,100 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 05:55:03,100 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 05:55:03,100 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 05:55:03,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 05:55:03,101 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 05:55:03,101 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 05:55:03,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 05:55:03,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 05:55:03,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 05:55:03,102 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 05:55:03,102 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 05:55:03,102 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 05:55:03,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 05:55:03,103 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 05:55:03,103 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 05:55:03,103 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 05:55:03,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 05:55:03,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 05:55:03,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 05:55:03,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:55:03,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 05:55:03,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 05:55:03,104 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 05:55:03,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 05:55:03,105 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 05:55:03,105 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 05:55:03,105 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 05:55:03,105 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 05:55:03,106 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b8fef41c3119c5f4fc9586ebd31a4ff7152be41d9f2f8da139e8cd34cf0da86 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 05:55:03,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 05:55:03,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 05:55:03,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 05:55:03,455 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 05:55:03,455 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 05:55:03,456 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1-dsl.wvr.c [2023-08-30 05:55:04,687 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 05:55:04,874 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 05:55:04,874 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1-dsl.wvr.c [2023-08-30 05:55:04,884 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/623b2a4a2/882a6923a2f6477caa4a14f4046c1add/FLAG249298de6 [2023-08-30 05:55:04,893 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/623b2a4a2/882a6923a2f6477caa4a14f4046c1add [2023-08-30 05:55:04,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 05:55:04,896 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 05:55:04,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 05:55:04,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 05:55:04,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 05:55:04,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:55:04" (1/1) ... [2023-08-30 05:55:04,901 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@199f6e90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:04, skipping insertion in model container [2023-08-30 05:55:04,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:55:04" (1/1) ... [2023-08-30 05:55:04,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 05:55:04,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:55:05,073 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/parallel-parallel-sum-1-dsl.wvr.c[4372,4385] [2023-08-30 05:55:05,082 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:55:05,090 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 05:55:05,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@47b26c61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:05, skipping insertion in model container [2023-08-30 05:55:05,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 05:55:05,091 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 05:55:05,093 INFO L158 Benchmark]: Toolchain (without parser) took 195.73ms. Allocated memory is still 65.0MB. Free memory was 45.4MB in the beginning and 35.1MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 05:55:05,093 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 65.0MB. Free memory is still 42.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 05:55:05,094 INFO L158 Benchmark]: CACSL2BoogieTranslator took 193.84ms. Allocated memory is still 65.0MB. Free memory was 45.3MB in the beginning and 35.1MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 05:55:05,095 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 65.0MB. Free memory is still 42.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 193.84ms. Allocated memory is still 65.0MB. Free memory was 45.3MB in the beginning and 35.1MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 183]: 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/parallel-parallel-sum-1-dsl.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 2b8fef41c3119c5f4fc9586ebd31a4ff7152be41d9f2f8da139e8cd34cf0da86 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 05:55:06,697 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 05:55:06,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 05:55:06,747 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 05:55:06,747 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 05:55:06,751 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 05:55:06,753 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 05:55:06,755 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 05:55:06,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 05:55:06,762 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 05:55:06,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 05:55:06,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 05:55:06,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 05:55:06,768 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 05:55:06,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 05:55:06,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 05:55:06,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 05:55:06,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 05:55:06,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 05:55:06,781 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 05:55:06,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 05:55:06,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 05:55:06,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 05:55:06,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 05:55:06,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 05:55:06,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 05:55:06,802 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 05:55:06,803 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 05:55:06,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 05:55:06,805 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 05:55:06,805 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 05:55:06,807 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 05:55:06,808 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 05:55:06,809 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 05:55:06,810 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 05:55:06,810 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 05:55:06,811 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 05:55:06,811 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 05:55:06,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 05:55:06,812 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 05:55:06,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 05:55:06,814 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 05:55:06,840 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 05:55:06,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 05:55:06,842 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 05:55:06,842 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 05:55:06,843 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 05:55:06,843 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 05:55:06,844 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 05:55:06,844 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 05:55:06,844 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 05:55:06,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 05:55:06,845 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 05:55:06,845 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 05:55:06,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 05:55:06,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 05:55:06,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 05:55:06,846 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 05:55:06,846 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 05:55:06,846 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 05:55:06,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 05:55:06,847 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 05:55:06,847 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 05:55:06,847 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 05:55:06,847 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 05:55:06,848 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 05:55:06,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 05:55:06,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 05:55:06,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 05:55:06,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:55:06,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 05:55:06,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 05:55:06,849 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 05:55:06,849 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 05:55:06,850 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 05:55:06,850 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 05:55:06,850 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 05:55:06,850 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 05:55:06,850 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 05:55:06,850 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b8fef41c3119c5f4fc9586ebd31a4ff7152be41d9f2f8da139e8cd34cf0da86 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 05:55:07,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 05:55:07,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 05:55:07,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 05:55:07,153 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 05:55:07,153 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 05:55:07,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1-dsl.wvr.c [2023-08-30 05:55:08,307 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 05:55:08,536 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 05:55:08,537 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1-dsl.wvr.c [2023-08-30 05:55:08,544 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40b9f03c6/af3a344ebe5f4b9fb51614db6d700278/FLAGc8e7efc25 [2023-08-30 05:55:08,556 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40b9f03c6/af3a344ebe5f4b9fb51614db6d700278 [2023-08-30 05:55:08,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 05:55:08,561 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 05:55:08,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 05:55:08,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 05:55:08,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 05:55:08,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:55:08" (1/1) ... [2023-08-30 05:55:08,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52160b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:08, skipping insertion in model container [2023-08-30 05:55:08,566 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:55:08" (1/1) ... [2023-08-30 05:55:08,571 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 05:55:08,591 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:55:08,761 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/parallel-parallel-sum-1-dsl.wvr.c[4372,4385] [2023-08-30 05:55:08,777 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:55:08,800 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 05:55:08,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:55:08,848 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/parallel-parallel-sum-1-dsl.wvr.c[4372,4385] [2023-08-30 05:55:08,854 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:55:08,863 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 05:55:08,906 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/parallel-parallel-sum-1-dsl.wvr.c[4372,4385] [2023-08-30 05:55:08,911 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:55:08,925 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 05:55:08,926 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 05:55:08,931 INFO L208 MainTranslator]: Completed translation [2023-08-30 05:55:08,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:08 WrapperNode [2023-08-30 05:55:08,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 05:55:08,933 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 05:55:08,933 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 05:55:08,934 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 05:55:08,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:08" (1/1) ... [2023-08-30 05:55:08,967 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:08" (1/1) ... [2023-08-30 05:55:09,010 INFO L138 Inliner]: procedures = 31, calls = 95, calls flagged for inlining = 21, calls inlined = 27, statements flattened = 289 [2023-08-30 05:55:09,012 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 05:55:09,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 05:55:09,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 05:55:09,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 05:55:09,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:08" (1/1) ... [2023-08-30 05:55:09,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:08" (1/1) ... [2023-08-30 05:55:09,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:08" (1/1) ... [2023-08-30 05:55:09,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:08" (1/1) ... [2023-08-30 05:55:09,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:08" (1/1) ... [2023-08-30 05:55:09,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:08" (1/1) ... [2023-08-30 05:55:09,071 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:08" (1/1) ... [2023-08-30 05:55:09,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:08" (1/1) ... [2023-08-30 05:55:09,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 05:55:09,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 05:55:09,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 05:55:09,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 05:55:09,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:08" (1/1) ... [2023-08-30 05:55:09,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:55:09,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:55:09,113 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 05:55:09,132 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 05:55:09,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 05:55:09,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 05:55:09,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 05:55:09,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 05:55:09,148 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 05:55:09,148 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 05:55:09,149 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 05:55:09,149 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 05:55:09,149 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 05:55:09,149 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 05:55:09,149 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 05:55:09,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 05:55:09,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-08-30 05:55:09,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-08-30 05:55:09,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-08-30 05:55:09,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-08-30 05:55:09,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 05:55:09,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 05:55:09,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 05:55:09,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 05:55:09,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 05:55:09,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 05:55:09,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 05:55:09,154 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 05:55:09,277 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 05:55:09,279 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 05:55:09,892 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 05:55:10,098 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 05:55:10,098 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-30 05:55:10,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:55:10 BoogieIcfgContainer [2023-08-30 05:55:10,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 05:55:10,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 05:55:10,103 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 05:55:10,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 05:55:10,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:55:08" (1/3) ... [2023-08-30 05:55:10,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6168e78c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:55:10, skipping insertion in model container [2023-08-30 05:55:10,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:08" (2/3) ... [2023-08-30 05:55:10,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6168e78c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:55:10, skipping insertion in model container [2023-08-30 05:55:10,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:55:10" (3/3) ... [2023-08-30 05:55:10,109 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1-dsl.wvr.c [2023-08-30 05:55:10,123 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 05:55:10,124 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2023-08-30 05:55:10,124 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 05:55:10,280 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-30 05:55:10,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 295 places, 294 transitions, 660 flow [2023-08-30 05:55:10,446 INFO L130 PetriNetUnfolder]: 18/262 cut-off events. [2023-08-30 05:55:10,446 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 05:55:10,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 262 events. 18/262 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 492 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 222. Up to 3 conditions per place. [2023-08-30 05:55:10,455 INFO L82 GeneralOperation]: Start removeDead. Operand has 295 places, 294 transitions, 660 flow [2023-08-30 05:55:10,467 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 259 places, 258 transitions, 564 flow [2023-08-30 05:55:10,479 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 05:55:10,489 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 259 places, 258 transitions, 564 flow [2023-08-30 05:55:10,497 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 259 places, 258 transitions, 564 flow [2023-08-30 05:55:10,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 258 transitions, 564 flow [2023-08-30 05:55:10,554 INFO L130 PetriNetUnfolder]: 18/258 cut-off events. [2023-08-30 05:55:10,554 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 05:55:10,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 258 events. 18/258 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 490 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 222. Up to 3 conditions per place. [2023-08-30 05:55:10,566 INFO L119 LiptonReduction]: Number of co-enabled transitions 12760 [2023-08-30 05:55:22,210 INFO L134 LiptonReduction]: Checked pairs total: 60475 [2023-08-30 05:55:22,210 INFO L136 LiptonReduction]: Total number of compositions: 213 [2023-08-30 05:55:22,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 05:55:22,227 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;@569f741, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 05:55:22,228 INFO L358 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2023-08-30 05:55:22,230 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 05:55:22,230 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 05:55:22,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:55:22,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:55:22,231 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:55:22,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:55:22,235 INFO L85 PathProgramCache]: Analyzing trace with hash 43267, now seen corresponding path program 1 times [2023-08-30 05:55:22,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:55:22,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722578139] [2023-08-30 05:55:22,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:55:22,245 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 05:55:22,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:55:22,253 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 05:55:22,299 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 05:55:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:55:22,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 05:55:22,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:55:22,482 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 05:55:22,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 05:55:22,506 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 05:55:22,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:55:22,507 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:55:22,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722578139] [2023-08-30 05:55:22,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722578139] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:55:22,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:55:22,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:55:22,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258062408] [2023-08-30 05:55:22,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:55:22,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:55:22,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:55:22,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:55:22,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:55:22,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 511 [2023-08-30 05:55:22,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 100 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:22,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:55:22,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 511 [2023-08-30 05:55:22,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:55:49,824 INFO L130 PetriNetUnfolder]: 290858/362019 cut-off events. [2023-08-30 05:55:49,824 INFO L131 PetriNetUnfolder]: For 18009/18009 co-relation queries the response was YES. [2023-08-30 05:55:50,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734759 conditions, 362019 events. 290858/362019 cut-off events. For 18009/18009 co-relation queries the response was YES. Maximal size of possible extension queue 16502. Compared 2026823 event pairs, 236783 based on Foata normal form. 0/145706 useless extension candidates. Maximal degree in co-relation 731026. Up to 339059 conditions per place. [2023-08-30 05:55:52,251 INFO L137 encePairwiseOnDemand]: 506/511 looper letters, 110 selfloop transitions, 3 changer transitions 0/147 dead transitions. [2023-08-30 05:55:52,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 147 transitions, 607 flow [2023-08-30 05:55:52,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:55:52,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:55:52,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 799 transitions. [2023-08-30 05:55:52,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212002609262884 [2023-08-30 05:55:52,267 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 799 transitions. [2023-08-30 05:55:52,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 799 transitions. [2023-08-30 05:55:52,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:55:52,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 799 transitions. [2023-08-30 05:55:52,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.3333333333333) internal successors, (799), 3 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:52,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:52,283 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:52,285 INFO L175 Difference]: Start difference. First operand has 110 places, 100 transitions, 248 flow. Second operand 3 states and 799 transitions. [2023-08-30 05:55:52,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 147 transitions, 607 flow [2023-08-30 05:56:00,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 147 transitions, 549 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-30 05:56:00,752 INFO L231 Difference]: Finished difference. Result has 99 places, 100 transitions, 229 flow [2023-08-30 05:56:00,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=229, PETRI_PLACES=99, PETRI_TRANSITIONS=100} [2023-08-30 05:56:00,757 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -11 predicate places. [2023-08-30 05:56:00,757 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 100 transitions, 229 flow [2023-08-30 05:56:00,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:00,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:56:00,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:56:00,770 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 05:56:00,967 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 05:56:00,968 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:56:00,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:56:00,968 INFO L85 PathProgramCache]: Analyzing trace with hash 43311, now seen corresponding path program 1 times [2023-08-30 05:56:00,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:56:00,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162521747] [2023-08-30 05:56:00,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:56:00,969 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 05:56:00,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:56:00,971 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 05:56:00,972 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 05:56:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:56:01,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:56:01,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:56:01,099 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 05:56:01,100 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 29 [2023-08-30 05:56:01,143 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 05:56:01,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:56:01,144 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:56:01,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162521747] [2023-08-30 05:56:01,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162521747] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:56:01,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:56:01,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:56:01,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357516954] [2023-08-30 05:56:01,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:56:01,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:56:01,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:56:01,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:56:01,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:56:01,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 511 [2023-08-30 05:56:01,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 100 transitions, 229 flow. Second operand has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:01,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:56:01,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 511 [2023-08-30 05:56:01,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:56:18,346 INFO L130 PetriNetUnfolder]: 216518/270567 cut-off events. [2023-08-30 05:56:18,346 INFO L131 PetriNetUnfolder]: For 3071/3071 co-relation queries the response was YES. [2023-08-30 05:56:18,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 537433 conditions, 270567 events. 216518/270567 cut-off events. For 3071/3071 co-relation queries the response was YES. Maximal size of possible extension queue 12445. Compared 1489049 event pairs, 174483 based on Foata normal form. 0/113967 useless extension candidates. Maximal degree in co-relation 516084. Up to 251030 conditions per place. [2023-08-30 05:56:19,751 INFO L137 encePairwiseOnDemand]: 506/511 looper letters, 108 selfloop transitions, 3 changer transitions 0/145 dead transitions. [2023-08-30 05:56:19,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 145 transitions, 554 flow [2023-08-30 05:56:19,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:56:19,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:56:19,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 797 transitions. [2023-08-30 05:56:19,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198956294846706 [2023-08-30 05:56:19,754 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 797 transitions. [2023-08-30 05:56:19,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 797 transitions. [2023-08-30 05:56:19,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:56:19,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 797 transitions. [2023-08-30 05:56:19,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.6666666666667) internal successors, (797), 3 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:19,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:19,761 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:19,761 INFO L175 Difference]: Start difference. First operand has 99 places, 100 transitions, 229 flow. Second operand 3 states and 797 transitions. [2023-08-30 05:56:19,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 145 transitions, 554 flow [2023-08-30 05:56:19,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 145 transitions, 551 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:56:19,794 INFO L231 Difference]: Finished difference. Result has 100 places, 99 transitions, 235 flow [2023-08-30 05:56:19,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=235, PETRI_PLACES=100, PETRI_TRANSITIONS=99} [2023-08-30 05:56:19,795 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -10 predicate places. [2023-08-30 05:56:19,796 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 99 transitions, 235 flow [2023-08-30 05:56:19,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:19,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:56:19,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:56:19,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 05:56:20,008 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 05:56:20,009 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:56:20,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:56:20,009 INFO L85 PathProgramCache]: Analyzing trace with hash 43268, now seen corresponding path program 1 times [2023-08-30 05:56:20,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:56:20,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1019748870] [2023-08-30 05:56:20,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:56:20,010 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 05:56:20,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:56:20,011 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 05:56:20,014 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 (4)] Waiting until timeout for monitored process [2023-08-30 05:56:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:56:20,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:56:20,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:56:20,147 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 05:56:20,148 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 05:56:20,167 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 05:56:20,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:56:20,168 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:56:20,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1019748870] [2023-08-30 05:56:20,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1019748870] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:56:20,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:56:20,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:56:20,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757869255] [2023-08-30 05:56:20,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:56:20,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:56:20,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:56:20,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:56:20,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:56:20,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 511 [2023-08-30 05:56:20,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 99 transitions, 235 flow. Second operand has 3 states, 3 states have (on average 232.66666666666666) internal successors, (698), 3 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:20,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:56:20,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 511 [2023-08-30 05:56:20,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:56:37,927 INFO L130 PetriNetUnfolder]: 220117/275725 cut-off events. [2023-08-30 05:56:37,927 INFO L131 PetriNetUnfolder]: For 4858/4858 co-relation queries the response was YES. [2023-08-30 05:56:38,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 548577 conditions, 275725 events. 220117/275725 cut-off events. For 4858/4858 co-relation queries the response was YES. Maximal size of possible extension queue 12445. Compared 1519142 event pairs, 153763 based on Foata normal form. 0/117349 useless extension candidates. Maximal degree in co-relation 525802. Up to 265620 conditions per place. [2023-08-30 05:56:39,284 INFO L137 encePairwiseOnDemand]: 506/511 looper letters, 74 selfloop transitions, 4 changer transitions 0/109 dead transitions. [2023-08-30 05:56:39,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 109 transitions, 413 flow [2023-08-30 05:56:39,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:56:39,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:56:39,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 773 transitions. [2023-08-30 05:56:39,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5042400521852577 [2023-08-30 05:56:39,288 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 773 transitions. [2023-08-30 05:56:39,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 773 transitions. [2023-08-30 05:56:39,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:56:39,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 773 transitions. [2023-08-30 05:56:39,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:39,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:39,297 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:39,298 INFO L175 Difference]: Start difference. First operand has 100 places, 99 transitions, 235 flow. Second operand 3 states and 773 transitions. [2023-08-30 05:56:39,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 109 transitions, 413 flow [2023-08-30 05:56:39,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 109 transitions, 407 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:56:39,310 INFO L231 Difference]: Finished difference. Result has 101 places, 102 transitions, 255 flow [2023-08-30 05:56:39,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=255, PETRI_PLACES=101, PETRI_TRANSITIONS=102} [2023-08-30 05:56:39,311 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -9 predicate places. [2023-08-30 05:56:39,311 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 102 transitions, 255 flow [2023-08-30 05:56:39,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 232.66666666666666) internal successors, (698), 3 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:39,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:56:39,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:56:39,319 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 05:56:39,516 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 05:56:39,516 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:56:39,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:56:39,517 INFO L85 PathProgramCache]: Analyzing trace with hash 43312, now seen corresponding path program 1 times [2023-08-30 05:56:39,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:56:39,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35476087] [2023-08-30 05:56:39,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:56:39,518 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 05:56:39,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:56:39,519 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 05:56:39,519 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 05:56:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:56:39,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:56:39,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:56:39,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:56:39,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:56:39,640 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 05:56:39,641 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 05:56:39,658 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 05:56:39,688 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 05:56:39,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:56:39,689 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:56:39,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35476087] [2023-08-30 05:56:39,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35476087] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:56:39,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:56:39,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:56:39,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864441535] [2023-08-30 05:56:39,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:56:39,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:56:39,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:56:39,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:56:39,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:56:39,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 511 [2023-08-30 05:56:39,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 102 transitions, 255 flow. Second operand has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:39,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:56:39,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 511 [2023-08-30 05:56:39,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:56:51,517 INFO L130 PetriNetUnfolder]: 141195/178036 cut-off events. [2023-08-30 05:56:51,517 INFO L131 PetriNetUnfolder]: For 2405/2405 co-relation queries the response was YES. [2023-08-30 05:56:51,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354018 conditions, 178036 events. 141195/178036 cut-off events. For 2405/2405 co-relation queries the response was YES. Maximal size of possible extension queue 8390. Compared 961465 event pairs, 117077 based on Foata normal form. 0/82402 useless extension candidates. Maximal degree in co-relation 352352. Up to 171439 conditions per place. [2023-08-30 05:56:52,431 INFO L137 encePairwiseOnDemand]: 508/511 looper letters, 63 selfloop transitions, 1 changer transitions 0/100 dead transitions. [2023-08-30 05:56:52,432 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 100 transitions, 379 flow [2023-08-30 05:56:52,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:56:52,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:56:52,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 771 transitions. [2023-08-30 05:56:52,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50293542074364 [2023-08-30 05:56:52,435 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 771 transitions. [2023-08-30 05:56:52,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 771 transitions. [2023-08-30 05:56:52,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:56:52,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 771 transitions. [2023-08-30 05:56:52,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:52,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:52,441 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:52,441 INFO L175 Difference]: Start difference. First operand has 101 places, 102 transitions, 255 flow. Second operand 3 states and 771 transitions. [2023-08-30 05:56:52,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 100 transitions, 379 flow [2023-08-30 05:56:52,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 100 transitions, 375 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:56:52,450 INFO L231 Difference]: Finished difference. Result has 100 places, 100 transitions, 249 flow [2023-08-30 05:56:52,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=100, PETRI_TRANSITIONS=100} [2023-08-30 05:56:52,452 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -10 predicate places. [2023-08-30 05:56:52,453 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 100 transitions, 249 flow [2023-08-30 05:56:52,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:52,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:56:52,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 05:56:52,466 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 05:56:52,664 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 05:56:52,665 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:56:52,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:56:52,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1343966, now seen corresponding path program 1 times [2023-08-30 05:56:52,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:56:52,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958558796] [2023-08-30 05:56:52,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:56:52,666 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 05:56:52,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:56:52,667 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 05:56:52,668 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 05:56:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:56:52,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 05:56:52,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:56:52,789 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 05:56:52,790 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 05:56:52,844 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 05:56:52,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:56:52,996 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 05:56:52,997 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:56:52,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958558796] [2023-08-30 05:56:52,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958558796] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:56:52,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:56:52,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 05:56:52,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644677653] [2023-08-30 05:56:52,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:56:52,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:56:52,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:56:52,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:56:52,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:56:54,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 511 [2023-08-30 05:56:54,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 100 transitions, 249 flow. Second operand has 6 states, 6 states have (on average 228.0) internal successors, (1368), 6 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:54,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:56:54,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 511 [2023-08-30 05:56:54,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:57:06,380 INFO L130 PetriNetUnfolder]: 142979/180488 cut-off events. [2023-08-30 05:57:06,380 INFO L131 PetriNetUnfolder]: For 2911/2911 co-relation queries the response was YES. [2023-08-30 05:57:06,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359315 conditions, 180488 events. 142979/180488 cut-off events. For 2911/2911 co-relation queries the response was YES. Maximal size of possible extension queue 8390. Compared 973345 event pairs, 117797 based on Foata normal form. 0/84042 useless extension candidates. Maximal degree in co-relation 359304. Up to 173708 conditions per place. [2023-08-30 05:57:07,321 INFO L137 encePairwiseOnDemand]: 503/511 looper letters, 81 selfloop transitions, 17 changer transitions 0/129 dead transitions. [2023-08-30 05:57:07,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 129 transitions, 527 flow [2023-08-30 05:57:07,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 05:57:07,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 05:57:07,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1461 transitions. [2023-08-30 05:57:07,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4765166340508806 [2023-08-30 05:57:07,326 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1461 transitions. [2023-08-30 05:57:07,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1461 transitions. [2023-08-30 05:57:07,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:57:07,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1461 transitions. [2023-08-30 05:57:07,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 243.5) internal successors, (1461), 6 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:07,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 511.0) internal successors, (3577), 7 states have internal predecessors, (3577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:07,336 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 511.0) internal successors, (3577), 7 states have internal predecessors, (3577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:07,336 INFO L175 Difference]: Start difference. First operand has 100 places, 100 transitions, 249 flow. Second operand 6 states and 1461 transitions. [2023-08-30 05:57:07,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 129 transitions, 527 flow [2023-08-30 05:57:07,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 129 transitions, 526 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:57:07,343 INFO L231 Difference]: Finished difference. Result has 108 places, 113 transitions, 376 flow [2023-08-30 05:57:07,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=108, PETRI_TRANSITIONS=113} [2023-08-30 05:57:07,344 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -2 predicate places. [2023-08-30 05:57:07,345 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 113 transitions, 376 flow [2023-08-30 05:57:07,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 228.0) internal successors, (1368), 6 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:07,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:57:07,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 05:57:07,357 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 05:57:07,554 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 05:57:07,555 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:57:07,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:57:07,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1376510548, now seen corresponding path program 1 times [2023-08-30 05:57:07,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:57:07,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197716815] [2023-08-30 05:57:07,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:57:07,556 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 05:57:07,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:57:07,557 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 05:57:07,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 05:57:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:57:07,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 05:57:07,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:57:07,668 INFO L321 Elim1Store]: treesize reduction 43, result has 33.8 percent of original size [2023-08-30 05:57:07,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 29 [2023-08-30 05:57:07,697 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 05:57:07,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:57:07,697 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:57:07,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [197716815] [2023-08-30 05:57:07,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [197716815] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:57:07,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:57:07,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:57:07,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646792245] [2023-08-30 05:57:07,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:57:07,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:57:07,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:57:07,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:57:07,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:57:07,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 511 [2023-08-30 05:57:07,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 113 transitions, 376 flow. Second operand has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:07,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:57:07,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 511 [2023-08-30 05:57:07,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:57:21,018 INFO L130 PetriNetUnfolder]: 144792/183219 cut-off events. [2023-08-30 05:57:21,018 INFO L131 PetriNetUnfolder]: For 2993/2999 co-relation queries the response was YES. [2023-08-30 05:57:21,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364760 conditions, 183219 events. 144792/183219 cut-off events. For 2993/2999 co-relation queries the response was YES. Maximal size of possible extension queue 8397. Compared 993984 event pairs, 115184 based on Foata normal form. 1/85289 useless extension candidates. Maximal degree in co-relation 364744. Up to 168721 conditions per place. [2023-08-30 05:57:22,114 INFO L137 encePairwiseOnDemand]: 502/511 looper letters, 119 selfloop transitions, 8 changer transitions 0/168 dead transitions. [2023-08-30 05:57:22,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 168 transitions, 761 flow [2023-08-30 05:57:22,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:57:22,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:57:22,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 796 transitions. [2023-08-30 05:57:22,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192433137638617 [2023-08-30 05:57:22,116 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 796 transitions. [2023-08-30 05:57:22,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 796 transitions. [2023-08-30 05:57:22,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:57:22,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 796 transitions. [2023-08-30 05:57:22,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:22,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:22,122 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:22,122 INFO L175 Difference]: Start difference. First operand has 108 places, 113 transitions, 376 flow. Second operand 3 states and 796 transitions. [2023-08-30 05:57:22,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 168 transitions, 761 flow [2023-08-30 05:57:22,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 168 transitions, 739 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 05:57:22,132 INFO L231 Difference]: Finished difference. Result has 111 places, 118 transitions, 412 flow [2023-08-30 05:57:22,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=412, PETRI_PLACES=111, PETRI_TRANSITIONS=118} [2023-08-30 05:57:22,133 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 1 predicate places. [2023-08-30 05:57:22,133 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 118 transitions, 412 flow [2023-08-30 05:57:22,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:22,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:57:22,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 05:57:22,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 05:57:22,343 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 05:57:22,343 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:57:22,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:57:22,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1376510549, now seen corresponding path program 1 times [2023-08-30 05:57:22,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:57:22,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243069101] [2023-08-30 05:57:22,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:57:22,345 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:57:22,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:57:22,348 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 05:57:22,349 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 05:57:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:57:22,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:57:22,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:57:22,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:57:22,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:57:22,466 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 05:57:22,467 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 05:57:22,473 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 05:57:22,513 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 05:57:22,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:57:22,513 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:57:22,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243069101] [2023-08-30 05:57:22,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1243069101] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:57:22,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:57:22,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:57:22,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101933911] [2023-08-30 05:57:22,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:57:22,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:57:22,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:57:22,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:57:22,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:57:22,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 511 [2023-08-30 05:57:22,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 118 transitions, 412 flow. Second operand has 3 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:22,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:57:22,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 511 [2023-08-30 05:57:22,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:57:35,224 INFO L130 PetriNetUnfolder]: 143847/181912 cut-off events. [2023-08-30 05:57:35,224 INFO L131 PetriNetUnfolder]: For 7134/7142 co-relation queries the response was YES. [2023-08-30 05:57:35,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365034 conditions, 181912 events. 143847/181912 cut-off events. For 7134/7142 co-relation queries the response was YES. Maximal size of possible extension queue 8395. Compared 987168 event pairs, 118846 based on Foata normal form. 361/85253 useless extension candidates. Maximal degree in co-relation 365015. Up to 175045 conditions per place. [2023-08-30 05:57:36,519 INFO L137 encePairwiseOnDemand]: 508/511 looper letters, 72 selfloop transitions, 1 changer transitions 0/116 dead transitions. [2023-08-30 05:57:36,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 116 transitions, 554 flow [2023-08-30 05:57:36,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:57:36,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:57:36,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 770 transitions. [2023-08-30 05:57:36,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.502283105022831 [2023-08-30 05:57:36,522 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 770 transitions. [2023-08-30 05:57:36,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 770 transitions. [2023-08-30 05:57:36,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:57:36,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 770 transitions. [2023-08-30 05:57:36,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:36,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:36,527 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:36,527 INFO L175 Difference]: Start difference. First operand has 111 places, 118 transitions, 412 flow. Second operand 3 states and 770 transitions. [2023-08-30 05:57:36,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 116 transitions, 554 flow [2023-08-30 05:57:36,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 116 transitions, 538 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:57:36,552 INFO L231 Difference]: Finished difference. Result has 109 places, 116 transitions, 394 flow [2023-08-30 05:57:36,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=394, PETRI_PLACES=109, PETRI_TRANSITIONS=116} [2023-08-30 05:57:36,553 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -1 predicate places. [2023-08-30 05:57:36,553 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 116 transitions, 394 flow [2023-08-30 05:57:36,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:36,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:57:36,554 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 05:57:36,564 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 05:57:36,762 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 05:57:36,763 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:57:36,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:57:36,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1386024836, now seen corresponding path program 2 times [2023-08-30 05:57:36,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:57:36,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728672134] [2023-08-30 05:57:36,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:57:36,764 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 05:57:36,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:57:36,765 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 05:57:36,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 05:57:36,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:57:36,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:57:36,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 05:57:36,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:57:36,919 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 05:57:36,920 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 05:57:37,037 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 05:57:37,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:57:37,533 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 05:57:37,533 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:57:37,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728672134] [2023-08-30 05:57:37,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728672134] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:57:37,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:57:37,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 05:57:37,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142541275] [2023-08-30 05:57:37,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:57:37,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 05:57:37,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:57:37,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 05:57:37,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 05:57:41,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 511 [2023-08-30 05:57:41,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 116 transitions, 394 flow. Second operand has 12 states, 12 states have (on average 229.0) internal successors, (2748), 12 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:41,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:57:41,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 511 [2023-08-30 05:57:41,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:57:56,126 INFO L130 PetriNetUnfolder]: 145156/183628 cut-off events. [2023-08-30 05:57:56,126 INFO L131 PetriNetUnfolder]: For 6704/6708 co-relation queries the response was YES. [2023-08-30 05:57:56,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368828 conditions, 183628 events. 145156/183628 cut-off events. For 6704/6708 co-relation queries the response was YES. Maximal size of possible extension queue 8398. Compared 994155 event pairs, 104516 based on Foata normal form. 6/86088 useless extension candidates. Maximal degree in co-relation 368809. Up to 176604 conditions per place. [2023-08-30 05:57:57,206 INFO L137 encePairwiseOnDemand]: 503/511 looper letters, 116 selfloop transitions, 36 changer transitions 0/183 dead transitions. [2023-08-30 05:57:57,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 183 transitions, 963 flow [2023-08-30 05:57:57,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 05:57:57,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 05:57:57,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2886 transitions. [2023-08-30 05:57:57,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4706457925636008 [2023-08-30 05:57:57,213 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2886 transitions. [2023-08-30 05:57:57,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2886 transitions. [2023-08-30 05:57:57,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:57:57,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2886 transitions. [2023-08-30 05:57:57,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 240.5) internal successors, (2886), 12 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:57,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 511.0) internal successors, (6643), 13 states have internal predecessors, (6643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:57,227 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 511.0) internal successors, (6643), 13 states have internal predecessors, (6643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:57,228 INFO L175 Difference]: Start difference. First operand has 109 places, 116 transitions, 394 flow. Second operand 12 states and 2886 transitions. [2023-08-30 05:57:57,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 183 transitions, 963 flow [2023-08-30 05:57:57,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 183 transitions, 962 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:57:57,237 INFO L231 Difference]: Finished difference. Result has 126 places, 137 transitions, 663 flow [2023-08-30 05:57:57,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=663, PETRI_PLACES=126, PETRI_TRANSITIONS=137} [2023-08-30 05:57:57,238 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 16 predicate places. [2023-08-30 05:57:57,238 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 137 transitions, 663 flow [2023-08-30 05:57:57,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 229.0) internal successors, (2748), 12 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:57,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:57:57,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:57:57,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-08-30 05:57:57,448 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 05:57:57,449 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:57:57,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:57:57,449 INFO L85 PathProgramCache]: Analyzing trace with hash -266273782, now seen corresponding path program 1 times [2023-08-30 05:57:57,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:57:57,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924701912] [2023-08-30 05:57:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:57:57,449 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 05:57:57,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:57:57,451 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 05:57:57,453 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 05:57:57,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:57:57,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 05:57:57,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:57:57,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 05:57:57,556 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 05:57:57,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 05:57:57,563 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 05:57:57,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:57:57,563 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:57:57,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924701912] [2023-08-30 05:57:57,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924701912] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:57:57,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:57:57,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:57:57,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69366374] [2023-08-30 05:57:57,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:57:57,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:57:57,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:57:57,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:57:57,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:57:57,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 511 [2023-08-30 05:57:57,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 137 transitions, 663 flow. Second operand has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:57,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:57:57,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 511 [2023-08-30 05:57:57,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:58:09,084 INFO L130 PetriNetUnfolder]: 115791/150843 cut-off events. [2023-08-30 05:58:09,084 INFO L131 PetriNetUnfolder]: For 6647/6651 co-relation queries the response was YES. [2023-08-30 05:58:09,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300639 conditions, 150843 events. 115791/150843 cut-off events. For 6647/6651 co-relation queries the response was YES. Maximal size of possible extension queue 6338. Compared 866172 event pairs, 81266 based on Foata normal form. 0/74741 useless extension candidates. Maximal degree in co-relation 300612. Up to 130436 conditions per place. [2023-08-30 05:58:10,455 INFO L137 encePairwiseOnDemand]: 503/511 looper letters, 125 selfloop transitions, 18 changer transitions 0/186 dead transitions. [2023-08-30 05:58:10,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 186 transitions, 1073 flow [2023-08-30 05:58:10,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:58:10,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:58:10,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 792 transitions. [2023-08-30 05:58:10,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166340508806262 [2023-08-30 05:58:10,458 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 792 transitions. [2023-08-30 05:58:10,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 792 transitions. [2023-08-30 05:58:10,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:58:10,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 792 transitions. [2023-08-30 05:58:10,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:58:10,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:58:10,462 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:58:10,463 INFO L175 Difference]: Start difference. First operand has 126 places, 137 transitions, 663 flow. Second operand 3 states and 792 transitions. [2023-08-30 05:58:10,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 186 transitions, 1073 flow [2023-08-30 05:58:10,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 186 transitions, 1053 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-30 05:58:10,480 INFO L231 Difference]: Finished difference. Result has 128 places, 142 transitions, 748 flow [2023-08-30 05:58:10,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=748, PETRI_PLACES=128, PETRI_TRANSITIONS=142} [2023-08-30 05:58:10,481 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 18 predicate places. [2023-08-30 05:58:10,481 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 142 transitions, 748 flow [2023-08-30 05:58:10,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:58:10,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:58:10,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:58:10,491 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 05:58:10,690 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 05:58:10,691 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:58:10,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:58:10,691 INFO L85 PathProgramCache]: Analyzing trace with hash -266273781, now seen corresponding path program 1 times [2023-08-30 05:58:10,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:58:10,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097978891] [2023-08-30 05:58:10,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:58:10,692 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 05:58:10,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:58:10,693 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 05:58:10,696 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 05:58:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:58:10,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 05:58:10,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:58:10,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 05:58:10,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 05:58:10,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:58:10,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:58:10,825 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 05:58:10,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 05:58:10,841 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 05:58:10,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:58:10,841 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:58:10,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097978891] [2023-08-30 05:58:10,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097978891] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:58:10,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:58:10,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:58:10,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145764061] [2023-08-30 05:58:10,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:58:10,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:58:10,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:58:10,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:58:10,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:58:11,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 511 [2023-08-30 05:58:11,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 142 transitions, 748 flow. Second operand has 4 states, 4 states have (on average 224.75) internal successors, (899), 4 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:58:11,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:58:11,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 511 [2023-08-30 05:58:11,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:58:19,782 INFO L130 PetriNetUnfolder]: 84357/111274 cut-off events. [2023-08-30 05:58:19,782 INFO L131 PetriNetUnfolder]: For 18045/18048 co-relation queries the response was YES. [2023-08-30 05:58:20,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231656 conditions, 111274 events. 84357/111274 cut-off events. For 18045/18048 co-relation queries the response was YES. Maximal size of possible extension queue 4255. Compared 635591 event pairs, 65355 based on Foata normal form. 6528/65730 useless extension candidates. Maximal degree in co-relation 231628. Up to 93571 conditions per place. [2023-08-30 05:58:20,691 INFO L137 encePairwiseOnDemand]: 502/511 looper letters, 149 selfloop transitions, 20 changer transitions 0/211 dead transitions. [2023-08-30 05:58:20,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 211 transitions, 1264 flow [2023-08-30 05:58:20,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:58:20,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:58:20,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1033 transitions. [2023-08-30 05:58:20,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5053816046966731 [2023-08-30 05:58:20,693 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1033 transitions. [2023-08-30 05:58:20,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1033 transitions. [2023-08-30 05:58:20,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:58:20,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1033 transitions. [2023-08-30 05:58:20,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 258.25) internal successors, (1033), 4 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:58:20,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 511.0) internal successors, (2555), 5 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:58:20,699 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 511.0) internal successors, (2555), 5 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:58:20,699 INFO L175 Difference]: Start difference. First operand has 128 places, 142 transitions, 748 flow. Second operand 4 states and 1033 transitions. [2023-08-30 05:58:20,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 211 transitions, 1264 flow [2023-08-30 05:58:20,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 211 transitions, 1228 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:58:20,735 INFO L231 Difference]: Finished difference. Result has 127 places, 140 transitions, 748 flow [2023-08-30 05:58:20,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=748, PETRI_PLACES=127, PETRI_TRANSITIONS=140} [2023-08-30 05:58:20,736 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 17 predicate places. [2023-08-30 05:58:20,736 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 140 transitions, 748 flow [2023-08-30 05:58:20,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.75) internal successors, (899), 4 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:58:20,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:58:20,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:58:20,746 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 05:58:20,945 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 05:58:20,945 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:58:20,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:58:20,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1808967282, now seen corresponding path program 1 times [2023-08-30 05:58:20,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:58:20,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1344395324] [2023-08-30 05:58:20,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:58:20,946 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 05:58:20,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:58:20,947 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 05:58:21,105 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 05:58:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:58:21,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 05:58:21,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:58:21,293 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 05:58:21,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:58:21,293 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:58:21,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1344395324] [2023-08-30 05:58:21,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1344395324] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:58:21,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:58:21,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:58:21,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384213275] [2023-08-30 05:58:21,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:58:21,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:58:21,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:58:21,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:58:21,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:58:21,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 511 [2023-08-30 05:58:21,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 140 transitions, 748 flow. Second operand has 5 states, 5 states have (on average 235.2) internal successors, (1176), 5 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:58:21,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:58:21,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 511 [2023-08-30 05:58:21,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:58:32,576 INFO L130 PetriNetUnfolder]: 105201/140365 cut-off events. [2023-08-30 05:58:32,576 INFO L131 PetriNetUnfolder]: For 22638/22650 co-relation queries the response was YES. [2023-08-30 05:58:33,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293608 conditions, 140365 events. 105201/140365 cut-off events. For 22638/22650 co-relation queries the response was YES. Maximal size of possible extension queue 4820. Compared 851065 event pairs, 72333 based on Foata normal form. 1/76731 useless extension candidates. Maximal degree in co-relation 293580. Up to 102412 conditions per place. [2023-08-30 05:58:33,683 INFO L137 encePairwiseOnDemand]: 501/511 looper letters, 165 selfloop transitions, 4 changer transitions 0/226 dead transitions. [2023-08-30 05:58:33,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 226 transitions, 1389 flow [2023-08-30 05:58:33,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:58:33,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:58:33,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1311 transitions. [2023-08-30 05:58:33,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5131115459882584 [2023-08-30 05:58:33,686 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1311 transitions. [2023-08-30 05:58:33,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1311 transitions. [2023-08-30 05:58:33,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:58:33,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1311 transitions. [2023-08-30 05:58:33,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 262.2) internal successors, (1311), 5 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:58:33,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 511.0) internal successors, (3066), 6 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:58:33,692 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 511.0) internal successors, (3066), 6 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:58:33,692 INFO L175 Difference]: Start difference. First operand has 127 places, 140 transitions, 748 flow. Second operand 5 states and 1311 transitions. [2023-08-30 05:58:33,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 226 transitions, 1389 flow [2023-08-30 05:58:33,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 226 transitions, 1348 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:58:33,802 INFO L231 Difference]: Finished difference. Result has 132 places, 142 transitions, 754 flow [2023-08-30 05:58:33,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=754, PETRI_PLACES=132, PETRI_TRANSITIONS=142} [2023-08-30 05:58:33,802 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 22 predicate places. [2023-08-30 05:58:33,802 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 142 transitions, 754 flow [2023-08-30 05:58:33,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 235.2) internal successors, (1176), 5 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:58:33,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:58:33,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:58:33,816 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 05:58:34,013 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 05:58:34,013 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:58:34,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:58:34,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1462434484, now seen corresponding path program 1 times [2023-08-30 05:58:34,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:58:34,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921445787] [2023-08-30 05:58:34,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:58:34,014 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 05:58:34,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:58:34,015 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 05:58:34,016 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 05:58:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:58:34,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 05:58:34,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:58:34,219 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 05:58:34,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:58:34,307 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 05:58:34,308 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:58:34,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921445787] [2023-08-30 05:58:34,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921445787] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:58:34,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:58:34,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 05:58:34,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198899905] [2023-08-30 05:58:34,308 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:58:34,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 05:58:34,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:58:34,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 05:58:34,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 05:58:34,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 511 [2023-08-30 05:58:34,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 142 transitions, 754 flow. Second operand has 10 states, 10 states have (on average 233.4) internal successors, (2334), 10 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:58:34,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:58:34,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 511 [2023-08-30 05:58:34,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand