./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 BEFORE --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 BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:29:31,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:29:31,984 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:29:32,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:29:32,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:29:32,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:29:32,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:29:32,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:29:32,033 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:29:32,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:29:32,037 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:29:32,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:29:32,040 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:29:32,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:29:32,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:29:32,047 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:29:32,048 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:29:32,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:29:32,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:29:32,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:29:32,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:29:32,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:29:32,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:29:32,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:29:32,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:29:32,076 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:29:32,076 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:29:32,078 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:29:32,079 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:29:32,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:29:32,080 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:29:32,081 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:29:32,083 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:29:32,084 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:29:32,084 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:29:32,085 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:29:32,085 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:29:32,086 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:29:32,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:29:32,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:29:32,087 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:29:32,089 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 02:29:32,121 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:29:32,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:29:32,122 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:29:32,122 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:29:32,123 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:29:32,123 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:29:32,124 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:29:32,124 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:29:32,124 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:29:32,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:29:32,125 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:29:32,125 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:29:32,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:29:32,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:29:32,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:29:32,126 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:29:32,126 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:29:32,127 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:29:32,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:29:32,127 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:29:32,127 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:29:32,127 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:29:32,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:29:32,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:29:32,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:29:32,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:29:32,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:29:32,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:29:32,129 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 02:29:32,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 02:29:32,129 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:29:32,129 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:29:32,130 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:29:32,130 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:29:32,130 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b8fef41c3119c5f4fc9586ebd31a4ff7152be41d9f2f8da139e8cd34cf0da86 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:29:32,415 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:29:32,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:29:32,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:29:32,435 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:29:32,435 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:29:32,437 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1-dsl.wvr.c [2023-09-01 02:29:33,578 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:29:33,757 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:29:33,758 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1-dsl.wvr.c [2023-09-01 02:29:33,763 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31f7b5bc4/97b2860fd8fa44e2aa08b6eb59e9ad7b/FLAGc713e9409 [2023-09-01 02:29:33,774 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31f7b5bc4/97b2860fd8fa44e2aa08b6eb59e9ad7b [2023-09-01 02:29:33,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:29:33,776 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:29:33,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:29:33,777 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:29:33,786 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:29:33,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:29:33" (1/1) ... [2023-09-01 02:29:33,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58c90d47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:33, skipping insertion in model container [2023-09-01 02:29:33,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:29:33" (1/1) ... [2023-09-01 02:29:33,794 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:29:33,813 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:29:34,010 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] [2023-09-01 02:29:34,025 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:29:34,038 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) [2023-09-01 02:29:34,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@58b76338 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:34, skipping insertion in model container [2023-09-01 02:29:34,040 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:29:34,041 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 02:29:34,043 INFO L158 Benchmark]: Toolchain (without parser) took 265.09ms. Allocated memory is still 67.1MB. Free memory was 38.6MB in the beginning and 28.5MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 02:29:34,043 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 67.1MB. Free memory is still 45.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 02:29:34,044 INFO L158 Benchmark]: CACSL2BoogieTranslator took 263.40ms. Allocated memory is still 67.1MB. Free memory was 38.6MB in the beginning and 28.5MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 02:29:34,045 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 67.1MB. Free memory is still 45.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 263.40ms. Allocated memory is still 67.1MB. Free memory was 38.6MB in the beginning and 28.5MB in the end (delta: 10.2MB). 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 BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:29:35,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:29:35,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:29:35,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:29:35,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:29:35,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:29:35,775 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:29:35,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:29:35,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:29:35,785 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:29:35,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:29:35,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:29:35,789 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:29:35,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:29:35,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:29:35,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:29:35,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:29:35,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:29:35,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:29:35,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:29:35,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:29:35,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:29:35,809 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:29:35,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:29:35,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:29:35,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:29:35,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:29:35,819 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:29:35,820 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:29:35,820 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:29:35,821 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:29:35,827 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:29:35,828 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:29:35,829 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:29:35,830 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:29:35,830 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:29:35,831 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:29:35,831 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:29:35,831 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:29:35,832 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:29:35,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:29:35,834 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 02:29:35,875 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:29:35,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:29:35,876 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:29:35,876 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:29:35,877 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:29:35,877 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:29:35,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:29:35,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:29:35,878 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:29:35,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:29:35,879 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:29:35,879 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:29:35,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:29:35,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:29:35,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:29:35,880 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:29:35,880 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:29:35,880 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:29:35,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:29:35,880 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:29:35,881 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 02:29:35,881 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 02:29:35,881 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:29:35,881 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:29:35,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:29:35,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:29:35,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:29:35,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:29:35,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:29:35,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:29:35,882 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 02:29:35,883 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 02:29:35,883 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:29:35,883 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:29:35,883 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:29:35,883 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 02:29:35,884 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:29:35,884 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b8fef41c3119c5f4fc9586ebd31a4ff7152be41d9f2f8da139e8cd34cf0da86 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:29:36,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:29:36,211 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:29:36,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:29:36,214 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:29:36,214 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:29:36,215 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1-dsl.wvr.c [2023-09-01 02:29:37,412 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:29:37,618 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:29:37,619 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1-dsl.wvr.c [2023-09-01 02:29:37,626 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5312e176d/5e9ecea9f89346a7bfd94718d1d18e21/FLAG6e7b3ea49 [2023-09-01 02:29:37,639 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5312e176d/5e9ecea9f89346a7bfd94718d1d18e21 [2023-09-01 02:29:37,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:29:37,642 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:29:37,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:29:37,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:29:37,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:29:37,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:29:37" (1/1) ... [2023-09-01 02:29:37,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@551a3ec0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:37, skipping insertion in model container [2023-09-01 02:29:37,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:29:37" (1/1) ... [2023-09-01 02:29:37,654 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:29:37,682 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:29:37,834 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] [2023-09-01 02:29:37,861 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:29:37,880 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 02:29:37,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:29:37,908 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] [2023-09-01 02:29:37,924 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:29:37,933 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 02:29:37,968 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] [2023-09-01 02:29:37,980 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:29:37,991 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:29:37,993 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:29:37,998 INFO L208 MainTranslator]: Completed translation [2023-09-01 02:29:37,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:37 WrapperNode [2023-09-01 02:29:37,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:29:38,000 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 02:29:38,000 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 02:29:38,001 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 02:29:38,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:37" (1/1) ... [2023-09-01 02:29:38,034 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:37" (1/1) ... [2023-09-01 02:29:38,061 INFO L138 Inliner]: procedures = 31, calls = 95, calls flagged for inlining = 21, calls inlined = 27, statements flattened = 289 [2023-09-01 02:29:38,061 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 02:29:38,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 02:29:38,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 02:29:38,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 02:29:38,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:37" (1/1) ... [2023-09-01 02:29:38,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:37" (1/1) ... [2023-09-01 02:29:38,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:37" (1/1) ... [2023-09-01 02:29:38,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:37" (1/1) ... [2023-09-01 02:29:38,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:37" (1/1) ... [2023-09-01 02:29:38,114 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:37" (1/1) ... [2023-09-01 02:29:38,117 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:37" (1/1) ... [2023-09-01 02:29:38,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:37" (1/1) ... [2023-09-01 02:29:38,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 02:29:38,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 02:29:38,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 02:29:38,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 02:29:38,130 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:37" (1/1) ... [2023-09-01 02:29:38,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:29:38,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:29:38,153 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) [2023-09-01 02:29:38,178 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 [2023-09-01 02:29:38,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 02:29:38,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 02:29:38,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 02:29:38,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 02:29:38,201 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 02:29:38,201 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 02:29:38,201 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 02:29:38,201 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 02:29:38,201 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 02:29:38,202 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 02:29:38,202 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 02:29:38,202 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 02:29:38,202 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-09-01 02:29:38,202 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-09-01 02:29:38,202 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-09-01 02:29:38,203 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-09-01 02:29:38,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 02:29:38,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 02:29:38,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 02:29:38,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 02:29:38,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 02:29:38,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 02:29:38,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 02:29:38,210 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 02:29:38,343 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 02:29:38,345 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 02:29:38,973 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 02:29:39,205 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 02:29:39,206 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-09-01 02:29:39,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:29:39 BoogieIcfgContainer [2023-09-01 02:29:39,209 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 02:29:39,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 02:29:39,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 02:29:39,215 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 02:29:39,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:29:37" (1/3) ... [2023-09-01 02:29:39,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14561378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:29:39, skipping insertion in model container [2023-09-01 02:29:39,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:29:37" (2/3) ... [2023-09-01 02:29:39,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14561378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:29:39, skipping insertion in model container [2023-09-01 02:29:39,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:29:39" (3/3) ... [2023-09-01 02:29:39,217 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1-dsl.wvr.c [2023-09-01 02:29:39,232 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 02:29:39,232 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2023-09-01 02:29:39,232 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 02:29:39,385 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-09-01 02:29:39,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 295 places, 294 transitions, 660 flow [2023-09-01 02:29:39,556 INFO L130 PetriNetUnfolder]: 18/262 cut-off events. [2023-09-01 02:29:39,557 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 02:29:39,563 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. [2023-09-01 02:29:39,563 INFO L82 GeneralOperation]: Start removeDead. Operand has 295 places, 294 transitions, 660 flow [2023-09-01 02:29:39,569 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 259 places, 258 transitions, 564 flow [2023-09-01 02:29:39,572 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 02:29:39,580 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 259 places, 258 transitions, 564 flow [2023-09-01 02:29:39,582 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 259 places, 258 transitions, 564 flow [2023-09-01 02:29:39,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 258 transitions, 564 flow [2023-09-01 02:29:39,629 INFO L130 PetriNetUnfolder]: 18/258 cut-off events. [2023-09-01 02:29:39,629 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 02:29:39,631 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. [2023-09-01 02:29:39,637 INFO L119 LiptonReduction]: Number of co-enabled transitions 12760 [2023-09-01 02:29:51,368 INFO L134 LiptonReduction]: Checked pairs total: 60475 [2023-09-01 02:29:51,369 INFO L136 LiptonReduction]: Total number of compositions: 213 [2023-09-01 02:29:51,381 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 02:29:51,386 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;@507105f3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 02:29:51,387 INFO L358 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2023-09-01 02:29:51,389 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 02:29:51,389 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:29:51,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:29:51,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:29:51,390 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:29:51,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:29:51,394 INFO L85 PathProgramCache]: Analyzing trace with hash 43267, now seen corresponding path program 1 times [2023-09-01 02:29:51,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:29:51,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997747483] [2023-09-01 02:29:51,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:29:51,407 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 [2023-09-01 02:29:51,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:29:51,417 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) [2023-09-01 02:29:51,427 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 [2023-09-01 02:29:51,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:29:51,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 02:29:51,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:29:51,676 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 02:29:51,677 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 [2023-09-01 02:29:51,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:29:51,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:29:51,709 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:29:51,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997747483] [2023-09-01 02:29:51,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997747483] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:29:51,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:29:51,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:29:51,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699471827] [2023-09-01 02:29:51,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:29:51,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:29:51,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:29:51,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:29:51,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:29:51,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 511 [2023-09-01 02:29:51,947 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) [2023-09-01 02:29:51,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:29:51,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 511 [2023-09-01 02:29:51,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:30:19,041 INFO L130 PetriNetUnfolder]: 290858/362019 cut-off events. [2023-09-01 02:30:19,041 INFO L131 PetriNetUnfolder]: For 18009/18009 co-relation queries the response was YES. [2023-09-01 02:30:19,832 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. [2023-09-01 02:30:21,609 INFO L137 encePairwiseOnDemand]: 506/511 looper letters, 110 selfloop transitions, 3 changer transitions 0/147 dead transitions. [2023-09-01 02:30:21,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 147 transitions, 607 flow [2023-09-01 02:30:21,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:30:21,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:30:21,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 799 transitions. [2023-09-01 02:30:21,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212002609262884 [2023-09-01 02:30:21,625 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 799 transitions. [2023-09-01 02:30:21,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 799 transitions. [2023-09-01 02:30:21,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:30:21,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 799 transitions. [2023-09-01 02:30:21,633 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) [2023-09-01 02:30:21,638 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) [2023-09-01 02:30:21,640 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) [2023-09-01 02:30:21,641 INFO L175 Difference]: Start difference. First operand has 110 places, 100 transitions, 248 flow. Second operand 3 states and 799 transitions. [2023-09-01 02:30:21,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 147 transitions, 607 flow [2023-09-01 02:30:30,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 147 transitions, 549 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-09-01 02:30:30,002 INFO L231 Difference]: Finished difference. Result has 99 places, 100 transitions, 229 flow [2023-09-01 02:30:30,003 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} [2023-09-01 02:30:30,006 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -11 predicate places. [2023-09-01 02:30:30,006 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 100 transitions, 229 flow [2023-09-01 02:30:30,007 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) [2023-09-01 02:30:30,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:30:30,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:30:30,016 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 [2023-09-01 02:30:30,208 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 [2023-09-01 02:30:30,208 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:30:30,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:30:30,209 INFO L85 PathProgramCache]: Analyzing trace with hash 43311, now seen corresponding path program 1 times [2023-09-01 02:30:30,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:30:30,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374240947] [2023-09-01 02:30:30,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:30:30,210 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 [2023-09-01 02:30:30,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:30:30,211 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) [2023-09-01 02:30:30,214 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 [2023-09-01 02:30:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:30:30,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:30:30,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:30:30,334 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-09-01 02:30:30,335 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 [2023-09-01 02:30:30,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:30:30,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:30:30,379 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:30:30,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374240947] [2023-09-01 02:30:30,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374240947] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:30:30,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:30:30,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:30:30,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075274623] [2023-09-01 02:30:30,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:30:30,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:30:30,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:30:30,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:30:30,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:30:30,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 511 [2023-09-01 02:30:30,608 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) [2023-09-01 02:30:30,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:30:30,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 511 [2023-09-01 02:30:30,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:30:47,396 INFO L130 PetriNetUnfolder]: 216518/270567 cut-off events. [2023-09-01 02:30:47,397 INFO L131 PetriNetUnfolder]: For 3071/3071 co-relation queries the response was YES. [2023-09-01 02:30:47,754 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. [2023-09-01 02:30:49,061 INFO L137 encePairwiseOnDemand]: 506/511 looper letters, 108 selfloop transitions, 3 changer transitions 0/145 dead transitions. [2023-09-01 02:30:49,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 145 transitions, 554 flow [2023-09-01 02:30:49,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:30:49,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:30:49,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 797 transitions. [2023-09-01 02:30:49,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198956294846706 [2023-09-01 02:30:49,064 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 797 transitions. [2023-09-01 02:30:49,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 797 transitions. [2023-09-01 02:30:49,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:30:49,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 797 transitions. [2023-09-01 02:30:49,067 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) [2023-09-01 02:30:49,070 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) [2023-09-01 02:30:49,071 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) [2023-09-01 02:30:49,071 INFO L175 Difference]: Start difference. First operand has 99 places, 100 transitions, 229 flow. Second operand 3 states and 797 transitions. [2023-09-01 02:30:49,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 145 transitions, 554 flow [2023-09-01 02:30:49,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 145 transitions, 551 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:30:49,111 INFO L231 Difference]: Finished difference. Result has 100 places, 99 transitions, 235 flow [2023-09-01 02:30:49,111 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} [2023-09-01 02:30:49,112 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -10 predicate places. [2023-09-01 02:30:49,112 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 99 transitions, 235 flow [2023-09-01 02:30:49,113 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) [2023-09-01 02:30:49,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:30:49,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:30:49,123 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 [2023-09-01 02:30:49,322 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 [2023-09-01 02:30:49,323 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:30:49,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:30:49,324 INFO L85 PathProgramCache]: Analyzing trace with hash 43268, now seen corresponding path program 1 times [2023-09-01 02:30:49,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:30:49,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918532099] [2023-09-01 02:30:49,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:30:49,324 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 [2023-09-01 02:30:49,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:30:49,328 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) [2023-09-01 02:30:49,331 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 [2023-09-01 02:30:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:30:49,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:30:49,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:30:49,486 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:30:49,486 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 [2023-09-01 02:30:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:30:49,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:30:49,509 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:30:49,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918532099] [2023-09-01 02:30:49,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918532099] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:30:49,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:30:49,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:30:49,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982363137] [2023-09-01 02:30:49,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:30:49,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:30:49,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:30:49,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:30:49,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:30:49,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 511 [2023-09-01 02:30:49,687 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) [2023-09-01 02:30:49,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:30:49,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 511 [2023-09-01 02:30:49,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:31:06,852 INFO L130 PetriNetUnfolder]: 220117/275725 cut-off events. [2023-09-01 02:31:06,852 INFO L131 PetriNetUnfolder]: For 4858/4858 co-relation queries the response was YES. [2023-09-01 02:31:07,268 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. [2023-09-01 02:31:08,205 INFO L137 encePairwiseOnDemand]: 506/511 looper letters, 74 selfloop transitions, 4 changer transitions 0/109 dead transitions. [2023-09-01 02:31:08,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 109 transitions, 413 flow [2023-09-01 02:31:08,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:31:08,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:31:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 773 transitions. [2023-09-01 02:31:08,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5042400521852577 [2023-09-01 02:31:08,209 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 773 transitions. [2023-09-01 02:31:08,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 773 transitions. [2023-09-01 02:31:08,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:31:08,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 773 transitions. [2023-09-01 02:31:08,214 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) [2023-09-01 02:31:08,217 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) [2023-09-01 02:31:08,218 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) [2023-09-01 02:31:08,218 INFO L175 Difference]: Start difference. First operand has 100 places, 99 transitions, 235 flow. Second operand 3 states and 773 transitions. [2023-09-01 02:31:08,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 109 transitions, 413 flow [2023-09-01 02:31:08,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 109 transitions, 407 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:31:08,230 INFO L231 Difference]: Finished difference. Result has 101 places, 102 transitions, 255 flow [2023-09-01 02:31:08,230 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} [2023-09-01 02:31:08,231 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -9 predicate places. [2023-09-01 02:31:08,231 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 102 transitions, 255 flow [2023-09-01 02:31:08,232 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) [2023-09-01 02:31:08,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:31:08,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:31:08,243 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 [2023-09-01 02:31:08,440 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 [2023-09-01 02:31:08,441 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:31:08,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:31:08,441 INFO L85 PathProgramCache]: Analyzing trace with hash 43312, now seen corresponding path program 1 times [2023-09-01 02:31:08,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:31:08,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513627752] [2023-09-01 02:31:08,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:31:08,442 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 [2023-09-01 02:31:08,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:31:08,443 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) [2023-09-01 02:31:08,444 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 [2023-09-01 02:31:08,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:31:08,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:31:08,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:31:08,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:31:08,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:31:08,580 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 02:31:08,581 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 [2023-09-01 02:31:08,592 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 [2023-09-01 02:31:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:31:08,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:31:08,624 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:31:08,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513627752] [2023-09-01 02:31:08,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513627752] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:31:08,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:31:08,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:31:08,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250635144] [2023-09-01 02:31:08,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:31:08,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:31:08,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:31:08,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:31:08,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:31:08,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 511 [2023-09-01 02:31:08,853 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) [2023-09-01 02:31:08,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:31:08,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 511 [2023-09-01 02:31:08,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:31:20,579 INFO L130 PetriNetUnfolder]: 141195/178036 cut-off events. [2023-09-01 02:31:20,580 INFO L131 PetriNetUnfolder]: For 2405/2405 co-relation queries the response was YES. [2023-09-01 02:31:20,862 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. [2023-09-01 02:31:21,434 INFO L137 encePairwiseOnDemand]: 508/511 looper letters, 63 selfloop transitions, 1 changer transitions 0/100 dead transitions. [2023-09-01 02:31:21,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 100 transitions, 379 flow [2023-09-01 02:31:21,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:31:21,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:31:21,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 771 transitions. [2023-09-01 02:31:21,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50293542074364 [2023-09-01 02:31:21,437 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 771 transitions. [2023-09-01 02:31:21,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 771 transitions. [2023-09-01 02:31:21,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:31:21,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 771 transitions. [2023-09-01 02:31:21,440 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) [2023-09-01 02:31:21,442 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) [2023-09-01 02:31:21,443 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) [2023-09-01 02:31:21,443 INFO L175 Difference]: Start difference. First operand has 101 places, 102 transitions, 255 flow. Second operand 3 states and 771 transitions. [2023-09-01 02:31:21,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 100 transitions, 379 flow [2023-09-01 02:31:21,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 100 transitions, 375 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:31:21,452 INFO L231 Difference]: Finished difference. Result has 100 places, 100 transitions, 249 flow [2023-09-01 02:31:21,452 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} [2023-09-01 02:31:21,453 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -10 predicate places. [2023-09-01 02:31:21,453 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 100 transitions, 249 flow [2023-09-01 02:31:21,454 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) [2023-09-01 02:31:21,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:31:21,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:31:21,463 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 (5)] Ended with exit code 0 [2023-09-01 02:31:21,662 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 [2023-09-01 02:31:21,663 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:31:21,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:31:21,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1343966, now seen corresponding path program 1 times [2023-09-01 02:31:21,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:31:21,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931526498] [2023-09-01 02:31:21,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:31:21,664 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 [2023-09-01 02:31:21,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:31:21,666 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) [2023-09-01 02:31:21,668 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 [2023-09-01 02:31:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:31:21,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 02:31:21,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:31:21,822 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:31:21,822 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 [2023-09-01 02:31:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:31:21,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:31:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:31:22,053 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:31:22,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [931526498] [2023-09-01 02:31:22,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [931526498] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:31:22,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:31:22,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 02:31:22,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470658063] [2023-09-01 02:31:22,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:31:22,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:31:22,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:31:22,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:31:22,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:31:23,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 511 [2023-09-01 02:31:23,035 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) [2023-09-01 02:31:23,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:31:23,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 511 [2023-09-01 02:31:23,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:31:35,085 INFO L130 PetriNetUnfolder]: 142979/180488 cut-off events. [2023-09-01 02:31:35,086 INFO L131 PetriNetUnfolder]: For 2911/2911 co-relation queries the response was YES. [2023-09-01 02:31:35,381 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. [2023-09-01 02:31:36,133 INFO L137 encePairwiseOnDemand]: 503/511 looper letters, 81 selfloop transitions, 17 changer transitions 0/129 dead transitions. [2023-09-01 02:31:36,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 129 transitions, 527 flow [2023-09-01 02:31:36,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:31:36,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:31:36,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1461 transitions. [2023-09-01 02:31:36,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4765166340508806 [2023-09-01 02:31:36,138 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1461 transitions. [2023-09-01 02:31:36,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1461 transitions. [2023-09-01 02:31:36,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:31:36,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1461 transitions. [2023-09-01 02:31:36,142 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) [2023-09-01 02:31:36,147 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) [2023-09-01 02:31:36,148 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) [2023-09-01 02:31:36,148 INFO L175 Difference]: Start difference. First operand has 100 places, 100 transitions, 249 flow. Second operand 6 states and 1461 transitions. [2023-09-01 02:31:36,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 129 transitions, 527 flow [2023-09-01 02:31:36,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 129 transitions, 526 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:31:36,155 INFO L231 Difference]: Finished difference. Result has 108 places, 113 transitions, 376 flow [2023-09-01 02:31:36,155 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} [2023-09-01 02:31:36,156 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -2 predicate places. [2023-09-01 02:31:36,156 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 113 transitions, 376 flow [2023-09-01 02:31:36,157 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) [2023-09-01 02:31:36,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:31:36,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 02:31:36,169 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 (6)] Ended with exit code 0 [2023-09-01 02:31:36,365 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 [2023-09-01 02:31:36,367 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:31:36,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:31:36,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1376510548, now seen corresponding path program 1 times [2023-09-01 02:31:36,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:31:36,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049600096] [2023-09-01 02:31:36,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:31:36,368 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 [2023-09-01 02:31:36,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:31:36,368 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) [2023-09-01 02:31:36,370 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 [2023-09-01 02:31:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:31:36,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 02:31:36,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:31:36,470 INFO L321 Elim1Store]: treesize reduction 43, result has 33.8 percent of original size [2023-09-01 02:31:36,470 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 [2023-09-01 02:31:36,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:31:36,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:31:36,491 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:31:36,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049600096] [2023-09-01 02:31:36,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049600096] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:31:36,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:31:36,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:31:36,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913533192] [2023-09-01 02:31:36,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:31:36,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:31:36,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:31:36,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:31:36,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:31:36,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 511 [2023-09-01 02:31:36,602 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) [2023-09-01 02:31:36,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:31:36,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 511 [2023-09-01 02:31:36,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:31:49,252 INFO L130 PetriNetUnfolder]: 144792/183219 cut-off events. [2023-09-01 02:31:49,252 INFO L131 PetriNetUnfolder]: For 2993/2999 co-relation queries the response was YES. [2023-09-01 02:31:49,687 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. [2023-09-01 02:31:50,249 INFO L137 encePairwiseOnDemand]: 502/511 looper letters, 119 selfloop transitions, 8 changer transitions 0/168 dead transitions. [2023-09-01 02:31:50,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 168 transitions, 761 flow [2023-09-01 02:31:50,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:31:50,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:31:50,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 796 transitions. [2023-09-01 02:31:50,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192433137638617 [2023-09-01 02:31:50,251 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 796 transitions. [2023-09-01 02:31:50,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 796 transitions. [2023-09-01 02:31:50,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:31:50,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 796 transitions. [2023-09-01 02:31:50,253 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) [2023-09-01 02:31:50,255 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) [2023-09-01 02:31:50,256 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) [2023-09-01 02:31:50,256 INFO L175 Difference]: Start difference. First operand has 108 places, 113 transitions, 376 flow. Second operand 3 states and 796 transitions. [2023-09-01 02:31:50,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 168 transitions, 761 flow [2023-09-01 02:31:50,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 168 transitions, 739 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 02:31:50,266 INFO L231 Difference]: Finished difference. Result has 111 places, 118 transitions, 412 flow [2023-09-01 02:31:50,266 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} [2023-09-01 02:31:50,267 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 1 predicate places. [2023-09-01 02:31:50,267 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 118 transitions, 412 flow [2023-09-01 02:31:50,268 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) [2023-09-01 02:31:50,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:31:50,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 02:31:50,278 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 [2023-09-01 02:31:50,476 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 [2023-09-01 02:31:50,477 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:31:50,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:31:50,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1376510549, now seen corresponding path program 1 times [2023-09-01 02:31:50,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:31:50,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850975709] [2023-09-01 02:31:50,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:31:50,478 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 [2023-09-01 02:31:50,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:31:50,480 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) [2023-09-01 02:31:50,483 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 [2023-09-01 02:31:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:31:50,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:31:50,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:31:50,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:31:50,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:31:50,585 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 02:31:50,585 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 [2023-09-01 02:31:50,590 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 [2023-09-01 02:31:50,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:31:50,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:31:50,618 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:31:50,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850975709] [2023-09-01 02:31:50,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850975709] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:31:50,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:31:50,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:31:50,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972761421] [2023-09-01 02:31:50,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:31:50,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:31:50,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:31:50,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:31:50,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:31:50,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 511 [2023-09-01 02:31:50,765 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) [2023-09-01 02:31:50,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:31:50,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 511 [2023-09-01 02:31:50,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:32:03,411 INFO L130 PetriNetUnfolder]: 143847/181912 cut-off events. [2023-09-01 02:32:03,411 INFO L131 PetriNetUnfolder]: For 7134/7142 co-relation queries the response was YES. [2023-09-01 02:32:03,920 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. [2023-09-01 02:32:04,641 INFO L137 encePairwiseOnDemand]: 508/511 looper letters, 72 selfloop transitions, 1 changer transitions 0/116 dead transitions. [2023-09-01 02:32:04,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 116 transitions, 554 flow [2023-09-01 02:32:04,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:32:04,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:32:04,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 770 transitions. [2023-09-01 02:32:04,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.502283105022831 [2023-09-01 02:32:04,644 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 770 transitions. [2023-09-01 02:32:04,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 770 transitions. [2023-09-01 02:32:04,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:32:04,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 770 transitions. [2023-09-01 02:32:04,646 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) [2023-09-01 02:32:04,648 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) [2023-09-01 02:32:04,648 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) [2023-09-01 02:32:04,649 INFO L175 Difference]: Start difference. First operand has 111 places, 118 transitions, 412 flow. Second operand 3 states and 770 transitions. [2023-09-01 02:32:04,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 116 transitions, 554 flow [2023-09-01 02:32:04,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 116 transitions, 538 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:32:04,669 INFO L231 Difference]: Finished difference. Result has 109 places, 116 transitions, 394 flow [2023-09-01 02:32:04,669 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} [2023-09-01 02:32:04,670 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -1 predicate places. [2023-09-01 02:32:04,670 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 116 transitions, 394 flow [2023-09-01 02:32:04,670 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) [2023-09-01 02:32:04,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:32:04,670 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 02:32:04,682 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 [2023-09-01 02:32:04,883 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 [2023-09-01 02:32:04,883 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:32:04,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:32:04,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1386024836, now seen corresponding path program 2 times [2023-09-01 02:32:04,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:32:04,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730836583] [2023-09-01 02:32:04,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:32:04,884 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 [2023-09-01 02:32:04,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:32:04,885 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) [2023-09-01 02:32:04,887 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 [2023-09-01 02:32:04,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:32:04,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:32:04,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 02:32:04,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:32:05,028 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:32:05,029 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 [2023-09-01 02:32:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:32:05,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:32:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:32:05,665 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:32:05,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730836583] [2023-09-01 02:32:05,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730836583] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:32:05,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:32:05,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:32:05,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320765796] [2023-09-01 02:32:05,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:32:05,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:32:05,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:32:05,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:32:05,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:32:09,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 511 [2023-09-01 02:32:09,557 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) [2023-09-01 02:32:09,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:32:09,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 511 [2023-09-01 02:32:09,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:32:23,924 INFO L130 PetriNetUnfolder]: 145156/183628 cut-off events. [2023-09-01 02:32:23,924 INFO L131 PetriNetUnfolder]: For 6704/6708 co-relation queries the response was YES. [2023-09-01 02:32:24,435 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. [2023-09-01 02:32:24,999 INFO L137 encePairwiseOnDemand]: 503/511 looper letters, 116 selfloop transitions, 36 changer transitions 0/183 dead transitions. [2023-09-01 02:32:24,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 183 transitions, 963 flow [2023-09-01 02:32:25,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 02:32:25,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 02:32:25,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2886 transitions. [2023-09-01 02:32:25,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4706457925636008 [2023-09-01 02:32:25,006 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2886 transitions. [2023-09-01 02:32:25,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2886 transitions. [2023-09-01 02:32:25,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:32:25,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2886 transitions. [2023-09-01 02:32:25,012 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) [2023-09-01 02:32:25,019 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) [2023-09-01 02:32:25,020 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) [2023-09-01 02:32:25,021 INFO L175 Difference]: Start difference. First operand has 109 places, 116 transitions, 394 flow. Second operand 12 states and 2886 transitions. [2023-09-01 02:32:25,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 183 transitions, 963 flow [2023-09-01 02:32:25,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 183 transitions, 962 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:32:25,030 INFO L231 Difference]: Finished difference. Result has 126 places, 137 transitions, 663 flow [2023-09-01 02:32:25,031 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} [2023-09-01 02:32:25,031 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 16 predicate places. [2023-09-01 02:32:25,031 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 137 transitions, 663 flow [2023-09-01 02:32:25,033 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) [2023-09-01 02:32:25,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:32:25,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:32:25,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 02:32:25,248 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 [2023-09-01 02:32:25,249 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:32:25,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:32:25,250 INFO L85 PathProgramCache]: Analyzing trace with hash -266273782, now seen corresponding path program 1 times [2023-09-01 02:32:25,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:32:25,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074009010] [2023-09-01 02:32:25,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:32:25,250 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 [2023-09-01 02:32:25,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:32:25,252 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) [2023-09-01 02:32:25,254 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 [2023-09-01 02:32:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:32:25,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 02:32:25,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:32:25,341 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 [2023-09-01 02:32:25,362 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 02:32:25,362 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 [2023-09-01 02:32:25,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:32:25,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:32:25,370 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:32:25,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074009010] [2023-09-01 02:32:25,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074009010] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:32:25,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:32:25,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:32:25,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515663123] [2023-09-01 02:32:25,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:32:25,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:32:25,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:32:25,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:32:25,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:32:25,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 511 [2023-09-01 02:32:25,510 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) [2023-09-01 02:32:25,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:32:25,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 511 [2023-09-01 02:32:25,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:32:36,790 INFO L130 PetriNetUnfolder]: 115791/150843 cut-off events. [2023-09-01 02:32:36,790 INFO L131 PetriNetUnfolder]: For 6647/6651 co-relation queries the response was YES. [2023-09-01 02:32:37,406 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. [2023-09-01 02:32:37,850 INFO L137 encePairwiseOnDemand]: 503/511 looper letters, 125 selfloop transitions, 18 changer transitions 0/186 dead transitions. [2023-09-01 02:32:37,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 186 transitions, 1073 flow [2023-09-01 02:32:37,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:32:37,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:32:37,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 792 transitions. [2023-09-01 02:32:37,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166340508806262 [2023-09-01 02:32:37,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 792 transitions. [2023-09-01 02:32:37,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 792 transitions. [2023-09-01 02:32:37,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:32:37,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 792 transitions. [2023-09-01 02:32:37,854 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) [2023-09-01 02:32:37,856 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) [2023-09-01 02:32:37,857 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) [2023-09-01 02:32:37,857 INFO L175 Difference]: Start difference. First operand has 126 places, 137 transitions, 663 flow. Second operand 3 states and 792 transitions. [2023-09-01 02:32:37,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 186 transitions, 1073 flow [2023-09-01 02:32:37,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 186 transitions, 1053 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-09-01 02:32:37,872 INFO L231 Difference]: Finished difference. Result has 128 places, 142 transitions, 748 flow [2023-09-01 02:32:37,872 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} [2023-09-01 02:32:37,873 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 18 predicate places. [2023-09-01 02:32:37,873 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 142 transitions, 748 flow [2023-09-01 02:32:37,873 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) [2023-09-01 02:32:37,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:32:37,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:32:37,882 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 [2023-09-01 02:32:38,078 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 [2023-09-01 02:32:38,078 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:32:38,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:32:38,079 INFO L85 PathProgramCache]: Analyzing trace with hash -266273781, now seen corresponding path program 1 times [2023-09-01 02:32:38,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:32:38,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730615395] [2023-09-01 02:32:38,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:32:38,079 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 [2023-09-01 02:32:38,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:32:38,080 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) [2023-09-01 02:32:38,082 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 [2023-09-01 02:32:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:32:38,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:32:38,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:32:38,168 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 [2023-09-01 02:32:38,172 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 [2023-09-01 02:32:38,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:32:38,198 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 [2023-09-01 02:32:38,208 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 02:32:38,208 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 [2023-09-01 02:32:38,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:32:38,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:32:38,224 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:32:38,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730615395] [2023-09-01 02:32:38,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730615395] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:32:38,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:32:38,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:32:38,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030548974] [2023-09-01 02:32:38,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:32:38,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:32:38,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:32:38,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:32:38,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:32:38,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 511 [2023-09-01 02:32:38,416 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) [2023-09-01 02:32:38,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:32:38,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 511 [2023-09-01 02:32:38,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:32:47,456 INFO L130 PetriNetUnfolder]: 84357/111274 cut-off events. [2023-09-01 02:32:47,456 INFO L131 PetriNetUnfolder]: For 18045/18048 co-relation queries the response was YES. [2023-09-01 02:32:47,961 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. [2023-09-01 02:32:48,311 INFO L137 encePairwiseOnDemand]: 502/511 looper letters, 149 selfloop transitions, 20 changer transitions 0/211 dead transitions. [2023-09-01 02:32:48,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 211 transitions, 1264 flow [2023-09-01 02:32:48,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:32:48,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:32:48,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1033 transitions. [2023-09-01 02:32:48,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5053816046966731 [2023-09-01 02:32:48,314 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1033 transitions. [2023-09-01 02:32:48,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1033 transitions. [2023-09-01 02:32:48,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:32:48,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1033 transitions. [2023-09-01 02:32:48,316 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) [2023-09-01 02:32:48,318 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) [2023-09-01 02:32:48,319 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) [2023-09-01 02:32:48,319 INFO L175 Difference]: Start difference. First operand has 128 places, 142 transitions, 748 flow. Second operand 4 states and 1033 transitions. [2023-09-01 02:32:48,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 211 transitions, 1264 flow [2023-09-01 02:32:48,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 211 transitions, 1228 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:32:48,357 INFO L231 Difference]: Finished difference. Result has 127 places, 140 transitions, 748 flow [2023-09-01 02:32:48,357 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} [2023-09-01 02:32:48,358 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 17 predicate places. [2023-09-01 02:32:48,358 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 140 transitions, 748 flow [2023-09-01 02:32:48,358 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) [2023-09-01 02:32:48,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:32:48,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:32:48,370 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 (11)] Ended with exit code 0 [2023-09-01 02:32:48,567 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 [2023-09-01 02:32:48,567 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:32:48,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:32:48,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1808967282, now seen corresponding path program 1 times [2023-09-01 02:32:48,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:32:48,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125391328] [2023-09-01 02:32:48,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:32:48,568 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:32:48,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:32:48,569 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) [2023-09-01 02:32:48,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 02:32:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:32:48,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 02:32:48,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:32:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:32:48,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:32:48,759 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:32:48,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125391328] [2023-09-01 02:32:48,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125391328] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:32:48,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:32:48,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:32:48,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533611503] [2023-09-01 02:32:48,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:32:48,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:32:48,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:32:48,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:32:48,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:32:48,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 511 [2023-09-01 02:32:48,853 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) [2023-09-01 02:32:48,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:32:48,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 511 [2023-09-01 02:32:48,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:33:00,299 INFO L130 PetriNetUnfolder]: 105201/140365 cut-off events. [2023-09-01 02:33:00,299 INFO L131 PetriNetUnfolder]: For 22638/22650 co-relation queries the response was YES. [2023-09-01 02:33:00,904 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. [2023-09-01 02:33:01,343 INFO L137 encePairwiseOnDemand]: 501/511 looper letters, 165 selfloop transitions, 4 changer transitions 0/226 dead transitions. [2023-09-01 02:33:01,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 226 transitions, 1389 flow [2023-09-01 02:33:01,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:33:01,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:33:01,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1311 transitions. [2023-09-01 02:33:01,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5131115459882584 [2023-09-01 02:33:01,345 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1311 transitions. [2023-09-01 02:33:01,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1311 transitions. [2023-09-01 02:33:01,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:33:01,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1311 transitions. [2023-09-01 02:33:01,348 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) [2023-09-01 02:33:01,351 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) [2023-09-01 02:33:01,352 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) [2023-09-01 02:33:01,352 INFO L175 Difference]: Start difference. First operand has 127 places, 140 transitions, 748 flow. Second operand 5 states and 1311 transitions. [2023-09-01 02:33:01,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 226 transitions, 1389 flow [2023-09-01 02:33:01,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 226 transitions, 1348 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:33:01,465 INFO L231 Difference]: Finished difference. Result has 132 places, 142 transitions, 754 flow [2023-09-01 02:33:01,465 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} [2023-09-01 02:33:01,465 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 22 predicate places. [2023-09-01 02:33:01,466 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 142 transitions, 754 flow [2023-09-01 02:33:01,466 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) [2023-09-01 02:33:01,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:33:01,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:33:01,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 02:33:01,675 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 [2023-09-01 02:33:01,676 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:33:01,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:33:01,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1462434484, now seen corresponding path program 1 times [2023-09-01 02:33:01,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:33:01,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705038960] [2023-09-01 02:33:01,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:33:01,677 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:33:01,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:33:01,678 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) [2023-09-01 02:33:01,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 02:33:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:33:01,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 02:33:01,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:33:01,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:33:01,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:33:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:33:01,993 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:33:01,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705038960] [2023-09-01 02:33:01,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705038960] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:33:01,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:33:01,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 02:33:01,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073167614] [2023-09-01 02:33:01,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:33:01,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 02:33:01,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:33:01,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 02:33:01,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-09-01 02:33:02,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 511 [2023-09-01 02:33:02,169 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) [2023-09-01 02:33:02,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:33:02,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 511 [2023-09-01 02:33:02,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:33:18,303 INFO L130 PetriNetUnfolder]: 123460/172273 cut-off events. [2023-09-01 02:33:18,303 INFO L131 PetriNetUnfolder]: For 33299/33308 co-relation queries the response was YES. [2023-09-01 02:33:19,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369427 conditions, 172273 events. 123460/172273 cut-off events. For 33299/33308 co-relation queries the response was YES. Maximal size of possible extension queue 5597. Compared 1208487 event pairs, 50405 based on Foata normal form. 4037/107386 useless extension candidates. Maximal degree in co-relation 369395. Up to 58227 conditions per place. [2023-09-01 02:33:19,912 INFO L137 encePairwiseOnDemand]: 498/511 looper letters, 278 selfloop transitions, 14 changer transitions 0/349 dead transitions. [2023-09-01 02:33:19,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 349 transitions, 2032 flow [2023-09-01 02:33:19,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 02:33:19,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 02:33:19,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2810 transitions. [2023-09-01 02:33:19,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49991104785625334 [2023-09-01 02:33:19,917 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2810 transitions. [2023-09-01 02:33:19,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2810 transitions. [2023-09-01 02:33:19,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:33:19,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2810 transitions. [2023-09-01 02:33:19,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 255.45454545454547) internal successors, (2810), 11 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:19,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 511.0) internal successors, (6132), 12 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:19,926 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 511.0) internal successors, (6132), 12 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:19,926 INFO L175 Difference]: Start difference. First operand has 132 places, 142 transitions, 754 flow. Second operand 11 states and 2810 transitions. [2023-09-01 02:33:19,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 349 transitions, 2032 flow [2023-09-01 02:33:19,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 349 transitions, 2024 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 02:33:19,991 INFO L231 Difference]: Finished difference. Result has 145 places, 146 transitions, 831 flow [2023-09-01 02:33:19,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=831, PETRI_PLACES=145, PETRI_TRANSITIONS=146} [2023-09-01 02:33:19,993 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 35 predicate places. [2023-09-01 02:33:19,993 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 146 transitions, 831 flow [2023-09-01 02:33:19,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-09-01 02:33:19,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:33:19,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:33:20,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-09-01 02:33:20,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:33:20,194 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:33:20,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:33:20,195 INFO L85 PathProgramCache]: Analyzing trace with hash 803337788, now seen corresponding path program 1 times [2023-09-01 02:33:20,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:33:20,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651930589] [2023-09-01 02:33:20,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:33:20,195 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 [2023-09-01 02:33:20,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:33:20,196 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:33:20,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 02:33:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:33:20,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:33:20,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:33:20,297 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 [2023-09-01 02:33:20,301 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 [2023-09-01 02:33:20,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:33:20,316 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 [2023-09-01 02:33:20,326 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 02:33:20,327 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 [2023-09-01 02:33:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:33:20,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:33:20,341 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:33:20,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651930589] [2023-09-01 02:33:20,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1651930589] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:33:20,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:33:20,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:33:20,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863733878] [2023-09-01 02:33:20,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:33:20,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:33:20,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:33:20,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:33:20,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:33:20,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 511 [2023-09-01 02:33:20,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 146 transitions, 831 flow. Second operand has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:20,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:33:20,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 511 [2023-09-01 02:33:20,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:33:30,196 INFO L130 PetriNetUnfolder]: 76065/110524 cut-off events. [2023-09-01 02:33:30,196 INFO L131 PetriNetUnfolder]: For 53393/53397 co-relation queries the response was YES. [2023-09-01 02:33:30,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266382 conditions, 110524 events. 76065/110524 cut-off events. For 53393/53397 co-relation queries the response was YES. Maximal size of possible extension queue 2818. Compared 785567 event pairs, 21032 based on Foata normal form. 0/73849 useless extension candidates. Maximal degree in co-relation 266345. Up to 81899 conditions per place. [2023-09-01 02:33:31,344 INFO L137 encePairwiseOnDemand]: 501/511 looper letters, 139 selfloop transitions, 23 changer transitions 0/204 dead transitions. [2023-09-01 02:33:31,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 204 transitions, 1392 flow [2023-09-01 02:33:31,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:33:31,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:33:31,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1012 transitions. [2023-09-01 02:33:31,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49510763209393344 [2023-09-01 02:33:31,346 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1012 transitions. [2023-09-01 02:33:31,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1012 transitions. [2023-09-01 02:33:31,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:33:31,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1012 transitions. [2023-09-01 02:33:31,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:31,349 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) [2023-09-01 02:33:31,349 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) [2023-09-01 02:33:31,349 INFO L175 Difference]: Start difference. First operand has 145 places, 146 transitions, 831 flow. Second operand 4 states and 1012 transitions. [2023-09-01 02:33:31,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 204 transitions, 1392 flow [2023-09-01 02:33:31,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 204 transitions, 1363 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-09-01 02:33:31,398 INFO L231 Difference]: Finished difference. Result has 144 places, 151 transitions, 925 flow [2023-09-01 02:33:31,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=925, PETRI_PLACES=144, PETRI_TRANSITIONS=151} [2023-09-01 02:33:31,399 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 34 predicate places. [2023-09-01 02:33:31,399 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 151 transitions, 925 flow [2023-09-01 02:33:31,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:31,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:33:31,400 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:33:31,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 02:33:31,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:33:31,600 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:33:31,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:33:31,601 INFO L85 PathProgramCache]: Analyzing trace with hash 203325874, now seen corresponding path program 2 times [2023-09-01 02:33:31,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:33:31,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381247652] [2023-09-01 02:33:31,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:33:31,601 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 [2023-09-01 02:33:31,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:33:31,603 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:33:31,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 02:33:31,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 02:33:31,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:33:31,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:33:31,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:33:31,727 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 02:33:31,728 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 [2023-09-01 02:33:31,756 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-09-01 02:33:31,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2023-09-01 02:33:31,782 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-09-01 02:33:31,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2023-09-01 02:33:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 02:33:31,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:33:31,860 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:33:31,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381247652] [2023-09-01 02:33:31,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381247652] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:33:31,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:33:31,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 02:33:31,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330883523] [2023-09-01 02:33:31,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:33:31,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:33:31,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:33:31,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:33:31,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:33:32,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 511 [2023-09-01 02:33:32,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 151 transitions, 925 flow. Second operand has 6 states, 6 states have (on average 203.66666666666666) internal successors, (1222), 6 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:32,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:33:32,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 511 [2023-09-01 02:33:32,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:33:42,717 INFO L130 PetriNetUnfolder]: 81238/116353 cut-off events. [2023-09-01 02:33:42,717 INFO L131 PetriNetUnfolder]: For 93220/93220 co-relation queries the response was YES. [2023-09-01 02:33:43,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296873 conditions, 116353 events. 81238/116353 cut-off events. For 93220/93220 co-relation queries the response was YES. Maximal size of possible extension queue 2709. Compared 793740 event pairs, 38168 based on Foata normal form. 0/87019 useless extension candidates. Maximal degree in co-relation 296836. Up to 56365 conditions per place. [2023-09-01 02:33:43,921 INFO L137 encePairwiseOnDemand]: 489/511 looper letters, 254 selfloop transitions, 49 changer transitions 0/324 dead transitions. [2023-09-01 02:33:43,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 324 transitions, 2207 flow [2023-09-01 02:33:43,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 02:33:43,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 02:33:43,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1646 transitions. [2023-09-01 02:33:43,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46016214705060104 [2023-09-01 02:33:43,924 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1646 transitions. [2023-09-01 02:33:43,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1646 transitions. [2023-09-01 02:33:43,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:33:43,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1646 transitions. [2023-09-01 02:33:43,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 235.14285714285714) internal successors, (1646), 7 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:43,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 511.0) internal successors, (4088), 8 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:43,930 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 511.0) internal successors, (4088), 8 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:43,930 INFO L175 Difference]: Start difference. First operand has 144 places, 151 transitions, 925 flow. Second operand 7 states and 1646 transitions. [2023-09-01 02:33:43,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 324 transitions, 2207 flow [2023-09-01 02:33:43,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 324 transitions, 2166 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 02:33:43,989 INFO L231 Difference]: Finished difference. Result has 153 places, 188 transitions, 1335 flow [2023-09-01 02:33:43,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1335, PETRI_PLACES=153, PETRI_TRANSITIONS=188} [2023-09-01 02:33:43,990 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 43 predicate places. [2023-09-01 02:33:43,990 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 188 transitions, 1335 flow [2023-09-01 02:33:43,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 203.66666666666666) internal successors, (1222), 6 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:43,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:33:43,990 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:33:43,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-09-01 02:33:44,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:33:44,191 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:33:44,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:33:44,192 INFO L85 PathProgramCache]: Analyzing trace with hash 203325875, now seen corresponding path program 1 times [2023-09-01 02:33:44,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:33:44,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127387404] [2023-09-01 02:33:44,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:33:44,192 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 [2023-09-01 02:33:44,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:33:44,193 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:33:44,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 02:33:44,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:33:44,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 02:33:44,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:33:44,402 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:33:44,402 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 [2023-09-01 02:33:44,458 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 02:33:44,458 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 [2023-09-01 02:33:44,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:33:44,687 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 19 treesize of output 19 [2023-09-01 02:33:44,696 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 02:33:44,697 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 [2023-09-01 02:33:44,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:33:44,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 02:33:44,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:33:44,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:33:55,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:33:55,673 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:33:55,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127387404] [2023-09-01 02:33:55,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127387404] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:33:55,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:33:55,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-09-01 02:33:55,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230103663] [2023-09-01 02:33:55,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:33:55,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 02:33:55,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:33:55,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 02:33:55,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=193, Unknown=2, NotChecked=0, Total=240 [2023-09-01 02:33:58,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:34:01,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:34:03,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:34:06,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:34:08,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:34:11,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:34:13,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:34:15,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:34:17,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:34:20,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:34:22,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:34:24,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:34:26,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:34:28,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:34:31,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:34:33,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:34:35,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:34:37,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:34:39,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:34:41,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:34:44,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:34:48,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:34:49,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:34:51,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:34:54,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:34:57,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:01,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:03,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:05,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:08,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:10,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:12,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:15,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:17,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:20,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:22,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:25,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:27,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:30,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:33,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:35,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:37,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 02:35:40,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:42,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:45,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:47,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:49,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:52,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:54,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:57,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:35:58,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:01,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:03,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:06,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:08,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:10,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:12,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:15,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:18,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:20,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:20,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 511 [2023-09-01 02:36:20,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 188 transitions, 1335 flow. Second operand has 16 states, 16 states have (on average 158.375) internal successors, (2534), 16 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:36:20,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:36:20,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 511 [2023-09-01 02:36:20,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:36:26,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:28,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:38,295 WARN L222 SmtUtils]: Spent 6.00s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:36:40,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:42,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:43,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:45,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:47,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:49,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:51,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:36:59,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:37:07,269 WARN L222 SmtUtils]: Spent 5.89s on a formula simplification. DAG size of input: 63 DAG size of output: 61 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:37:09,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:37:13,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:37:15,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:37:17,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:37:19,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:37:22,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:37:24,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:37:31,043 WARN L222 SmtUtils]: Spent 6.64s on a formula simplification. DAG size of input: 69 DAG size of output: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:37:33,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:37:35,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:37:38,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:37:40,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:37:42,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:37:44,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:37:47,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:37:50,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:37:57,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:37:59,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:38:02,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:38:04,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:38:06,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:38:09,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:38:11,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:38:14,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:38:21,422 WARN L222 SmtUtils]: Spent 5.37s on a formula simplification. DAG size of input: 51 DAG size of output: 44 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:38:23,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:38:25,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:38:35,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:38:41,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:38:50,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:38:55,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:39:42,504 INFO L130 PetriNetUnfolder]: 324006/440410 cut-off events. [2023-09-01 02:39:42,504 INFO L131 PetriNetUnfolder]: For 754331/754349 co-relation queries the response was YES. [2023-09-01 02:39:45,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1295353 conditions, 440410 events. 324006/440410 cut-off events. For 754331/754349 co-relation queries the response was YES. Maximal size of possible extension queue 7853. Compared 3177443 event pairs, 131084 based on Foata normal form. 3808/370756 useless extension candidates. Maximal degree in co-relation 1295311. Up to 114693 conditions per place. [2023-09-01 02:39:46,854 INFO L137 encePairwiseOnDemand]: 491/511 looper letters, 1006 selfloop transitions, 140 changer transitions 0/1156 dead transitions. [2023-09-01 02:39:46,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 1156 transitions, 8583 flow [2023-09-01 02:39:46,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 02:39:46,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 02:39:46,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4625 transitions. [2023-09-01 02:39:46,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37712002609262885 [2023-09-01 02:39:46,863 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4625 transitions. [2023-09-01 02:39:46,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4625 transitions. [2023-09-01 02:39:46,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:39:46,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4625 transitions. [2023-09-01 02:39:46,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 192.70833333333334) internal successors, (4625), 24 states have internal predecessors, (4625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:46,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 511.0) internal successors, (12775), 25 states have internal predecessors, (12775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:46,882 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 511.0) internal successors, (12775), 25 states have internal predecessors, (12775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:46,883 INFO L175 Difference]: Start difference. First operand has 153 places, 188 transitions, 1335 flow. Second operand 24 states and 4625 transitions. [2023-09-01 02:39:46,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 1156 transitions, 8583 flow [2023-09-01 02:39:54,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 1156 transitions, 8446 flow, removed 47 selfloop flow, removed 2 redundant places. [2023-09-01 02:39:55,002 INFO L231 Difference]: Finished difference. Result has 182 places, 314 transitions, 3180 flow [2023-09-01 02:39:55,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=1301, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3180, PETRI_PLACES=182, PETRI_TRANSITIONS=314} [2023-09-01 02:39:55,003 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 72 predicate places. [2023-09-01 02:39:55,003 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 314 transitions, 3180 flow [2023-09-01 02:39:55,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 158.375) internal successors, (2534), 16 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:55,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:39:55,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:39:55,011 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 (16)] Ended with exit code 0 [2023-09-01 02:39:55,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:39:55,205 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:39:55,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:39:55,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1044234259, now seen corresponding path program 1 times [2023-09-01 02:39:55,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:39:55,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2002532129] [2023-09-01 02:39:55,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:39:55,206 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 [2023-09-01 02:39:55,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:39:55,207 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:39:55,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 02:39:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:39:55,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 02:39:55,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:39:55,298 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 [2023-09-01 02:39:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:39:55,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:39:55,315 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:39:55,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2002532129] [2023-09-01 02:39:55,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2002532129] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:39:55,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:39:55,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:39:55,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597214485] [2023-09-01 02:39:55,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:39:55,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:39:55,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:39:55,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:39:55,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:39:55,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 511 [2023-09-01 02:39:55,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 314 transitions, 3180 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) [2023-09-01 02:39:55,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:39:55,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 511 [2023-09-01 02:39:55,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:40:32,619 INFO L130 PetriNetUnfolder]: 213153/303377 cut-off events. [2023-09-01 02:40:32,619 INFO L131 PetriNetUnfolder]: For 1022000/1023688 co-relation queries the response was YES. [2023-09-01 02:40:34,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1037589 conditions, 303377 events. 213153/303377 cut-off events. For 1022000/1023688 co-relation queries the response was YES. Maximal size of possible extension queue 6168. Compared 2335751 event pairs, 90530 based on Foata normal form. 211/262224 useless extension candidates. Maximal degree in co-relation 1037539. Up to 160131 conditions per place. [2023-09-01 02:40:36,083 INFO L137 encePairwiseOnDemand]: 503/511 looper letters, 292 selfloop transitions, 47 changer transitions 0/396 dead transitions. [2023-09-01 02:40:36,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 396 transitions, 4596 flow [2023-09-01 02:40:36,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:40:36,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:40:36,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 789 transitions. [2023-09-01 02:40:36,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146771037181996 [2023-09-01 02:40:36,085 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 789 transitions. [2023-09-01 02:40:36,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 789 transitions. [2023-09-01 02:40:36,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:40:36,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 789 transitions. [2023-09-01 02:40:36,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 263.0) internal successors, (789), 3 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:36,089 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) [2023-09-01 02:40:36,089 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) [2023-09-01 02:40:36,089 INFO L175 Difference]: Start difference. First operand has 182 places, 314 transitions, 3180 flow. Second operand 3 states and 789 transitions. [2023-09-01 02:40:36,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 396 transitions, 4596 flow [2023-09-01 02:40:45,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 396 transitions, 4423 flow, removed 79 selfloop flow, removed 4 redundant places. [2023-09-01 02:40:45,740 INFO L231 Difference]: Finished difference. Result has 182 places, 331 transitions, 3485 flow [2023-09-01 02:40:45,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=3047, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3485, PETRI_PLACES=182, PETRI_TRANSITIONS=331} [2023-09-01 02:40:45,741 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 72 predicate places. [2023-09-01 02:40:45,741 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 331 transitions, 3485 flow [2023-09-01 02:40:45,742 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) [2023-09-01 02:40:45,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:40:45,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:40:45,750 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 (17)] Ended with exit code 0 [2023-09-01 02:40:45,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:40:45,948 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:40:45,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:40:45,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1044234258, now seen corresponding path program 1 times [2023-09-01 02:40:45,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:40:45,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820071335] [2023-09-01 02:40:45,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:40:45,949 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 [2023-09-01 02:40:45,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:40:45,953 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:40:45,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 02:40:46,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:40:46,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 02:40:46,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:40:46,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 02:40:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:40:46,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:40:46,070 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:40:46,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820071335] [2023-09-01 02:40:46,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820071335] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:40:46,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:40:46,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:40:46,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988546938] [2023-09-01 02:40:46,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:40:46,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:40:46,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:40:46,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:40:46,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:40:46,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 511 [2023-09-01 02:40:46,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 331 transitions, 3485 flow. Second operand has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:46,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:40:46,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 511 [2023-09-01 02:40:46,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:41:19,461 INFO L130 PetriNetUnfolder]: 190356/277057 cut-off events. [2023-09-01 02:41:19,461 INFO L131 PetriNetUnfolder]: For 1079470/1081652 co-relation queries the response was YES. [2023-09-01 02:41:21,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 958934 conditions, 277057 events. 190356/277057 cut-off events. For 1079470/1081652 co-relation queries the response was YES. Maximal size of possible extension queue 6069. Compared 2190435 event pairs, 120459 based on Foata normal form. 6035/244096 useless extension candidates. Maximal degree in co-relation 958885. Up to 185226 conditions per place. [2023-09-01 02:41:22,907 INFO L137 encePairwiseOnDemand]: 507/511 looper letters, 293 selfloop transitions, 23 changer transitions 0/377 dead transitions. [2023-09-01 02:41:22,908 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 377 transitions, 4474 flow [2023-09-01 02:41:22,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:41:22,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:41:22,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 798 transitions. [2023-09-01 02:41:22,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5205479452054794 [2023-09-01 02:41:22,910 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 798 transitions. [2023-09-01 02:41:22,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 798 transitions. [2023-09-01 02:41:22,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:41:22,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 798 transitions. [2023-09-01 02:41:22,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.0) internal successors, (798), 3 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:22,912 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) [2023-09-01 02:41:22,912 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) [2023-09-01 02:41:22,912 INFO L175 Difference]: Start difference. First operand has 182 places, 331 transitions, 3485 flow. Second operand 3 states and 798 transitions. [2023-09-01 02:41:22,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 377 transitions, 4474 flow [2023-09-01 02:41:34,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 377 transitions, 4352 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 02:41:34,260 INFO L231 Difference]: Finished difference. Result has 179 places, 329 transitions, 3405 flow [2023-09-01 02:41:34,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=3359, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3405, PETRI_PLACES=179, PETRI_TRANSITIONS=329} [2023-09-01 02:41:34,261 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 69 predicate places. [2023-09-01 02:41:34,261 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 329 transitions, 3405 flow [2023-09-01 02:41:34,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:34,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:41:34,262 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 02:41:34,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 02:41:34,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:41:34,469 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-09-01 02:41:34,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:41:34,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1005457732, now seen corresponding path program 3 times [2023-09-01 02:41:34,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:41:34,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896046723] [2023-09-01 02:41:34,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:41:34,470 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:41:34,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:41:34,470 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:41:34,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 02:41:34,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 02:41:34,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:41:34,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 02:41:34,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:41:34,696 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:41:34,697 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 [2023-09-01 02:41:35,006 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:41:35,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:41:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:41:37,296 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:41:37,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896046723] [2023-09-01 02:41:37,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896046723] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:41:37,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:41:37,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 02:41:37,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976651792] [2023-09-01 02:41:37,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:41:37,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 02:41:37,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:41:37,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 02:41:37,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 02:41:59,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 511 [2023-09-01 02:41:59,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 329 transitions, 3405 flow. Second operand has 24 states, 24 states have (on average 229.0) internal successors, (5496), 24 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:59,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:41:59,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 511 [2023-09-01 02:41:59,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15