./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue.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 c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:05:14,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:05:14,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:05:14,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:05:14,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:05:14,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:05:14,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:05:14,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:05:14,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:05:14,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:05:14,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:05:14,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:05:14,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:05:14,996 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:05:14,997 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:05:15,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:05:15,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:05:15,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:05:15,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:05:15,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:05:15,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:05:15,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:05:15,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:05:15,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:05:15,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:05:15,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:05:15,035 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:05:15,037 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:05:15,038 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:05:15,039 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:05:15,039 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:05:15,041 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:05:15,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:05:15,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:05:15,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:05:15,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:05:15,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:05:15,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:05:15,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:05:15,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:05:15,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:05:15,048 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:05:15,081 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:05:15,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:05:15,083 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:05:15,083 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:05:15,084 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:05:15,085 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:05:15,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:05:15,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:05:15,086 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:05:15,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:05:15,087 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:05:15,087 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:05:15,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:05:15,088 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:05:15,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:05:15,088 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:05:15,088 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:05:15,088 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:05:15,089 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:05:15,089 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:05:15,089 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:05:15,089 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:05:15,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:05:15,090 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:05:15,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:05:15,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:05:15,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:05:15,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:05:15,091 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:05:15,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:05:15,091 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:05:15,091 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:05:15,092 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:05:15,092 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:05:15,092 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:05:15,415 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:05:15,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:05:15,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:05:15,437 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:05:15,437 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:05:15,439 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c [2023-08-30 06:05:16,673 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:05:16,905 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:05:16,905 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c [2023-08-30 06:05:16,912 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82b255a00/5ca65f7bf69c46bfa51bd685b109f6f5/FLAG0c7a16bca [2023-08-30 06:05:16,927 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82b255a00/5ca65f7bf69c46bfa51bd685b109f6f5 [2023-08-30 06:05:16,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:05:16,930 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:05:16,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:05:16,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:05:16,943 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:05:16,944 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:05:16" (1/1) ... [2023-08-30 06:05:16,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bcc8667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:05:16, skipping insertion in model container [2023-08-30 06:05:16,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:05:16" (1/1) ... [2023-08-30 06:05:16,951 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:05:16,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:05:17,172 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2023-08-30 06:05:17,195 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:05:17,207 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 06:05:17,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@15cc5423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:05:17, skipping insertion in model container [2023-08-30 06:05:17,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:05:17,210 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:05:17,212 INFO L158 Benchmark]: Toolchain (without parser) took 280.43ms. Allocated memory is still 79.7MB. Free memory was 58.0MB in the beginning and 48.1MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 06:05:17,212 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 60.8MB. Free memory was 38.8MB in the beginning and 38.8MB in the end (delta: 81.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:05:17,214 INFO L158 Benchmark]: CACSL2BoogieTranslator took 278.36ms. Allocated memory is still 79.7MB. Free memory was 57.8MB in the beginning and 48.3MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 06:05:17,215 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 60.8MB. Free memory was 38.8MB in the beginning and 38.8MB in the end (delta: 81.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 278.36ms. Allocated memory is still 79.7MB. Free memory was 57.8MB in the beginning and 48.3MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 96]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue.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 c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:05:19,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:05:19,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:05:19,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:05:19,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:05:19,154 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:05:19,156 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:05:19,159 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:05:19,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:05:19,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:05:19,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:05:19,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:05:19,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:05:19,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:05:19,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:05:19,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:05:19,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:05:19,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:05:19,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:05:19,187 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:05:19,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:05:19,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:05:19,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:05:19,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:05:19,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:05:19,203 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:05:19,204 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:05:19,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:05:19,206 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:05:19,207 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:05:19,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:05:19,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:05:19,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:05:19,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:05:19,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:05:19,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:05:19,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:05:19,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:05:19,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:05:19,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:05:19,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:05:19,216 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:05:19,251 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:05:19,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:05:19,257 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:05:19,257 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:05:19,258 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:05:19,259 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:05:19,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:05:19,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:05:19,260 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:05:19,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:05:19,261 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:05:19,261 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:05:19,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:05:19,261 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:05:19,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:05:19,262 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:05:19,262 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:05:19,262 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:05:19,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:05:19,262 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:05:19,262 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:05:19,263 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:05:19,263 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:05:19,263 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:05:19,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:05:19,264 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:05:19,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:05:19,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:05:19,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:05:19,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:05:19,265 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:05:19,265 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:05:19,265 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:05:19,265 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:05:19,266 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:05:19,266 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:05:19,266 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:05:19,266 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:05:19,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:05:19,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:05:19,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:05:19,616 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:05:19,618 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:05:19,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c [2023-08-30 06:05:20,978 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:05:21,215 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:05:21,216 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c [2023-08-30 06:05:21,222 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62bb08756/839cc02a38d847a9ad3cbdff5ff65efe/FLAGd997a0fb4 [2023-08-30 06:05:21,234 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62bb08756/839cc02a38d847a9ad3cbdff5ff65efe [2023-08-30 06:05:21,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:05:21,237 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:05:21,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:05:21,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:05:21,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:05:21,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:05:21" (1/1) ... [2023-08-30 06:05:21,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c6b4d92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:05:21, skipping insertion in model container [2023-08-30 06:05:21,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:05:21" (1/1) ... [2023-08-30 06:05:21,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:05:21,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:05:21,417 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2023-08-30 06:05:21,430 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:05:21,442 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:05:21,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:05:21,455 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2023-08-30 06:05:21,460 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:05:21,468 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:05:21,498 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2023-08-30 06:05:21,511 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:05:21,527 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:05:21,530 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:05:21,536 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:05:21,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:05:21 WrapperNode [2023-08-30 06:05:21,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:05:21,539 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:05:21,539 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:05:21,539 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:05:21,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:05:21" (1/1) ... [2023-08-30 06:05:21,567 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:05:21" (1/1) ... [2023-08-30 06:05:21,602 INFO L138 Inliner]: procedures = 28, calls = 40, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 142 [2023-08-30 06:05:21,603 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:05:21,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:05:21,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:05:21,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:05:21,613 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:05:21" (1/1) ... [2023-08-30 06:05:21,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:05:21" (1/1) ... [2023-08-30 06:05:21,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:05:21" (1/1) ... [2023-08-30 06:05:21,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:05:21" (1/1) ... [2023-08-30 06:05:21,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:05:21" (1/1) ... [2023-08-30 06:05:21,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:05:21" (1/1) ... [2023-08-30 06:05:21,677 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:05:21" (1/1) ... [2023-08-30 06:05:21,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:05:21" (1/1) ... [2023-08-30 06:05:21,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:05:21,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:05:21,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:05:21,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:05:21,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:05:21" (1/1) ... [2023-08-30 06:05:21,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:05:21,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:05:21,726 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 06:05:21,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 06:05:21,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:05:21,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:05:21,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:05:21,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:05:21,772 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:05:21,772 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:05:21,772 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:05:21,772 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:05:21,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:05:21,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:05:21,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:05:21,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:05:21,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:05:21,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:05:21,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:05:21,775 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 06:05:21,907 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:05:21,909 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:05:22,274 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:05:22,400 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:05:22,401 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 06:05:22,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:05:22 BoogieIcfgContainer [2023-08-30 06:05:22,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:05:22,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:05:22,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:05:22,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:05:22,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:05:21" (1/3) ... [2023-08-30 06:05:22,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9af05e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:05:22, skipping insertion in model container [2023-08-30 06:05:22,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:05:21" (2/3) ... [2023-08-30 06:05:22,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9af05e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:05:22, skipping insertion in model container [2023-08-30 06:05:22,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:05:22" (3/3) ... [2023-08-30 06:05:22,412 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2023-08-30 06:05:22,429 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:05:22,429 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-08-30 06:05:22,429 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:05:22,512 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 06:05:22,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 127 transitions, 270 flow [2023-08-30 06:05:22,617 INFO L130 PetriNetUnfolder]: 9/125 cut-off events. [2023-08-30 06:05:22,617 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 06:05:22,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 125 events. 9/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 136 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-08-30 06:05:22,622 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 127 transitions, 270 flow [2023-08-30 06:05:22,627 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 121 transitions, 254 flow [2023-08-30 06:05:22,630 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:05:22,638 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 119 places, 121 transitions, 254 flow [2023-08-30 06:05:22,641 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 119 places, 121 transitions, 254 flow [2023-08-30 06:05:22,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 121 transitions, 254 flow [2023-08-30 06:05:22,667 INFO L130 PetriNetUnfolder]: 9/121 cut-off events. [2023-08-30 06:05:22,667 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 06:05:22,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 121 events. 9/121 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 135 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-08-30 06:05:22,670 INFO L119 LiptonReduction]: Number of co-enabled transitions 936 [2023-08-30 06:05:33,391 INFO L134 LiptonReduction]: Checked pairs total: 1568 [2023-08-30 06:05:33,392 INFO L136 LiptonReduction]: Total number of compositions: 124 [2023-08-30 06:05:33,409 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:05:33,414 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;@372db361, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:05:33,414 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-08-30 06:05:33,417 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 06:05:33,417 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:05:33,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:05:33,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:05:33,418 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:05:33,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:05:33,423 INFO L85 PathProgramCache]: Analyzing trace with hash 18618, now seen corresponding path program 1 times [2023-08-30 06:05:33,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:05:33,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [948029141] [2023-08-30 06:05:33,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:05:33,439 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:33,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:05:33,448 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:05:33,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 06:05:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:05:33,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:05:33,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:05:33,651 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 06:05:33,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 06:05:33,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:05:33,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:05:33,693 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:05:33,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [948029141] [2023-08-30 06:05:33,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [948029141] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:05:33,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:05:33,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:05:33,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914737532] [2023-08-30 06:05:33,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:05:33,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:05:33,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:05:33,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:05:33,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:05:33,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 251 [2023-08-30 06:05:33,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:33,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:05:33,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 251 [2023-08-30 06:05:33,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:05:34,108 INFO L130 PetriNetUnfolder]: 429/628 cut-off events. [2023-08-30 06:05:34,109 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 06:05:34,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1275 conditions, 628 events. 429/628 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 2670 event pairs, 222 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 1124. Up to 622 conditions per place. [2023-08-30 06:05:34,115 INFO L137 encePairwiseOnDemand]: 248/251 looper letters, 29 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-08-30 06:05:34,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 136 flow [2023-08-30 06:05:34,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:05:34,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:05:34,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 356 transitions. [2023-08-30 06:05:34,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47277556440903057 [2023-08-30 06:05:34,139 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 356 transitions. [2023-08-30 06:05:34,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 356 transitions. [2023-08-30 06:05:34,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:05:34,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 356 transitions. [2023-08-30 06:05:34,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:34,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:34,159 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:34,161 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 80 flow. Second operand 3 states and 356 transitions. [2023-08-30 06:05:34,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 136 flow [2023-08-30 06:05:34,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 128 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 06:05:34,169 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 70 flow [2023-08-30 06:05:34,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2023-08-30 06:05:34,177 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2023-08-30 06:05:34,177 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 70 flow [2023-08-30 06:05:34,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:34,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:05:34,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:05:34,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 06:05:34,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:34,393 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:05:34,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:05:34,394 INFO L85 PathProgramCache]: Analyzing trace with hash 18619, now seen corresponding path program 1 times [2023-08-30 06:05:34,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:05:34,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760361648] [2023-08-30 06:05:34,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:05:34,395 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:34,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:05:34,396 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:05:34,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 06:05:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:05:34,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:05:34,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:05:34,520 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:05:34,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:05:34,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:05:34,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:05:34,546 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:05:34,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760361648] [2023-08-30 06:05:34,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760361648] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:05:34,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:05:34,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:05:34,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592496898] [2023-08-30 06:05:34,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:05:34,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:05:34,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:05:34,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:05:34,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:05:34,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 251 [2023-08-30 06:05:34,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:34,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:05:34,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 251 [2023-08-30 06:05:34,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:05:35,005 INFO L130 PetriNetUnfolder]: 857/1254 cut-off events. [2023-08-30 06:05:35,005 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 06:05:35,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2514 conditions, 1254 events. 857/1254 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 6094 event pairs, 444 based on Foata normal form. 0/448 useless extension candidates. Maximal degree in co-relation 2508. Up to 623 conditions per place. [2023-08-30 06:05:35,016 INFO L137 encePairwiseOnDemand]: 248/251 looper letters, 56 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-08-30 06:05:35,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 60 transitions, 246 flow [2023-08-30 06:05:35,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:05:35,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:05:35,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 383 transitions. [2023-08-30 06:05:35,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5086321381142098 [2023-08-30 06:05:35,020 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 383 transitions. [2023-08-30 06:05:35,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 383 transitions. [2023-08-30 06:05:35,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:05:35,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 383 transitions. [2023-08-30 06:05:35,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:35,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:35,025 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:35,026 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 70 flow. Second operand 3 states and 383 transitions. [2023-08-30 06:05:35,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 60 transitions, 246 flow [2023-08-30 06:05:35,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 60 transitions, 245 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:05:35,028 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 81 flow [2023-08-30 06:05:35,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2023-08-30 06:05:35,029 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2023-08-30 06:05:35,029 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 81 flow [2023-08-30 06:05:35,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:35,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:05:35,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:05:35,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-08-30 06:05:35,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:35,241 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:05:35,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:05:35,245 INFO L85 PathProgramCache]: Analyzing trace with hash 18644, now seen corresponding path program 1 times [2023-08-30 06:05:35,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:05:35,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319519907] [2023-08-30 06:05:35,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:05:35,247 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:35,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:05:35,249 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:05:35,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 06:05:35,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:05:35,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 06:05:35,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:05:35,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:05:35,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:05:35,374 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 06:05:35,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 06:05:35,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 06:05:35,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:05:35,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:05:35,433 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:05:35,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319519907] [2023-08-30 06:05:35,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319519907] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:05:35,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:05:35,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:05:35,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867576723] [2023-08-30 06:05:35,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:05:35,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:05:35,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:05:35,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:05:35,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:05:35,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 251 [2023-08-30 06:05:35,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:35,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:05:35,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 251 [2023-08-30 06:05:35,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:05:35,786 INFO L130 PetriNetUnfolder]: 651/974 cut-off events. [2023-08-30 06:05:35,787 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 06:05:35,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1960 conditions, 974 events. 651/974 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 4667 event pairs, 334 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 1952. Up to 962 conditions per place. [2023-08-30 06:05:35,793 INFO L137 encePairwiseOnDemand]: 248/251 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-30 06:05:35,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 135 flow [2023-08-30 06:05:35,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:05:35,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:05:35,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 354 transitions. [2023-08-30 06:05:35,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4701195219123506 [2023-08-30 06:05:35,796 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 354 transitions. [2023-08-30 06:05:35,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 354 transitions. [2023-08-30 06:05:35,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:05:35,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 354 transitions. [2023-08-30 06:05:35,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:35,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:35,800 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:35,800 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 81 flow. Second operand 3 states and 354 transitions. [2023-08-30 06:05:35,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 135 flow [2023-08-30 06:05:35,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 133 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:05:35,802 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 77 flow [2023-08-30 06:05:35,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-08-30 06:05:35,803 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-08-30 06:05:35,803 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 77 flow [2023-08-30 06:05:35,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:35,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:05:35,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:05:35,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 06:05:36,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:36,014 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:05:36,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:05:36,015 INFO L85 PathProgramCache]: Analyzing trace with hash 18646, now seen corresponding path program 1 times [2023-08-30 06:05:36,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:05:36,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586085187] [2023-08-30 06:05:36,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:05:36,016 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:36,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:05:36,017 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:05:36,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 06:05:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:05:36,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:05:36,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:05:36,107 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2023-08-30 06:05:36,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2023-08-30 06:05:36,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:05:36,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:05:36,131 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:05:36,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586085187] [2023-08-30 06:05:36,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586085187] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:05:36,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:05:36,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:05:36,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471786898] [2023-08-30 06:05:36,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:05:36,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:05:36,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:05:36,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:05:36,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:05:36,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 251 [2023-08-30 06:05:36,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:36,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:05:36,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 251 [2023-08-30 06:05:36,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:05:36,385 INFO L130 PetriNetUnfolder]: 445/694 cut-off events. [2023-08-30 06:05:36,385 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 06:05:36,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1400 conditions, 694 events. 445/694 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3260 event pairs, 224 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 1391. Up to 682 conditions per place. [2023-08-30 06:05:36,390 INFO L137 encePairwiseOnDemand]: 248/251 looper letters, 26 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-30 06:05:36,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 127 flow [2023-08-30 06:05:36,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:05:36,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:05:36,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 343 transitions. [2023-08-30 06:05:36,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4555112881806109 [2023-08-30 06:05:36,392 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 343 transitions. [2023-08-30 06:05:36,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 343 transitions. [2023-08-30 06:05:36,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:05:36,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 343 transitions. [2023-08-30 06:05:36,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:36,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:36,396 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:36,396 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 77 flow. Second operand 3 states and 343 transitions. [2023-08-30 06:05:36,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 127 flow [2023-08-30 06:05:36,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 29 transitions, 126 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:05:36,398 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 74 flow [2023-08-30 06:05:36,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2023-08-30 06:05:36,400 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2023-08-30 06:05:36,400 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 74 flow [2023-08-30 06:05:36,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:36,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:05:36,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:05:36,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 06:05:36,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:36,610 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:05:36,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:05:36,611 INFO L85 PathProgramCache]: Analyzing trace with hash 578572, now seen corresponding path program 1 times [2023-08-30 06:05:36,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:05:36,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88948056] [2023-08-30 06:05:36,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:05:36,611 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:36,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:05:36,613 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:05:36,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 06:05:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:05:36,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:05:36,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:05:36,739 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:05:36,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:05:36,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:05:36,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:05:37,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:05:37,003 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:05:37,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88948056] [2023-08-30 06:05:37,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88948056] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:05:37,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:05:37,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:05:37,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495694801] [2023-08-30 06:05:37,004 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:05:37,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:05:37,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:05:37,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:05:37,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:05:37,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 251 [2023-08-30 06:05:37,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 74 flow. Second operand has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:37,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:05:37,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 251 [2023-08-30 06:05:37,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:05:38,047 INFO L130 PetriNetUnfolder]: 669/1044 cut-off events. [2023-08-30 06:05:38,047 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:05:38,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2105 conditions, 1044 events. 669/1044 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 5345 event pairs, 336 based on Foata normal form. 0/463 useless extension candidates. Maximal degree in co-relation 2095. Up to 342 conditions per place. [2023-08-30 06:05:38,054 INFO L137 encePairwiseOnDemand]: 247/251 looper letters, 71 selfloop transitions, 7 changer transitions 0/80 dead transitions. [2023-08-30 06:05:38,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 80 transitions, 346 flow [2023-08-30 06:05:38,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:05:38,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:05:38,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 699 transitions. [2023-08-30 06:05:38,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641434262948207 [2023-08-30 06:05:38,058 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 699 transitions. [2023-08-30 06:05:38,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 699 transitions. [2023-08-30 06:05:38,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:05:38,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 699 transitions. [2023-08-30 06:05:38,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 116.5) internal successors, (699), 6 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:38,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 251.0) internal successors, (1757), 7 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:38,064 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 251.0) internal successors, (1757), 7 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:38,064 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 74 flow. Second operand 6 states and 699 transitions. [2023-08-30 06:05:38,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 80 transitions, 346 flow [2023-08-30 06:05:38,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 80 transitions, 345 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:05:38,068 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 127 flow [2023-08-30 06:05:38,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=127, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2023-08-30 06:05:38,070 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-08-30 06:05:38,071 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 127 flow [2023-08-30 06:05:38,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:38,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:05:38,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 06:05:38,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 06:05:38,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:38,284 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:05:38,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:05:38,284 INFO L85 PathProgramCache]: Analyzing trace with hash 17931614, now seen corresponding path program 1 times [2023-08-30 06:05:38,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:05:38,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1094101702] [2023-08-30 06:05:38,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:05:38,285 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:38,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:05:38,286 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:05:38,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 06:05:38,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:05:38,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:05:38,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:05:38,385 INFO L321 Elim1Store]: treesize reduction 43, result has 33.8 percent of original size [2023-08-30 06:05:38,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 29 [2023-08-30 06:05:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:05:38,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:05:38,413 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:05:38,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1094101702] [2023-08-30 06:05:38,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1094101702] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:05:38,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:05:38,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:05:38,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414653425] [2023-08-30 06:05:38,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:05:38,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:05:38,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:05:38,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:05:38,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:05:38,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 251 [2023-08-30 06:05:38,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:38,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:05:38,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 251 [2023-08-30 06:05:38,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:05:38,652 INFO L130 PetriNetUnfolder]: 618/957 cut-off events. [2023-08-30 06:05:38,652 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 06:05:38,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1957 conditions, 957 events. 618/957 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 4748 event pairs, 309 based on Foata normal form. 0/444 useless extension candidates. Maximal degree in co-relation 1942. Up to 939 conditions per place. [2023-08-30 06:05:38,658 INFO L137 encePairwiseOnDemand]: 248/251 looper letters, 29 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-08-30 06:05:38,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 32 transitions, 183 flow [2023-08-30 06:05:38,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:05:38,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:05:38,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 341 transitions. [2023-08-30 06:05:38,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45285524568393093 [2023-08-30 06:05:38,660 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 341 transitions. [2023-08-30 06:05:38,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 341 transitions. [2023-08-30 06:05:38,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:05:38,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 341 transitions. [2023-08-30 06:05:38,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:38,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:38,664 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:38,664 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 127 flow. Second operand 3 states and 341 transitions. [2023-08-30 06:05:38,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 32 transitions, 183 flow [2023-08-30 06:05:38,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 32 transitions, 173 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 06:05:38,668 INFO L231 Difference]: Finished difference. Result has 41 places, 32 transitions, 115 flow [2023-08-30 06:05:38,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=41, PETRI_TRANSITIONS=32} [2023-08-30 06:05:38,670 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-08-30 06:05:38,671 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 32 transitions, 115 flow [2023-08-30 06:05:38,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:38,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:05:38,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 06:05:38,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 06:05:38,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:38,881 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:05:38,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:05:38,881 INFO L85 PathProgramCache]: Analyzing trace with hash 17931615, now seen corresponding path program 1 times [2023-08-30 06:05:38,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:05:38,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [998852527] [2023-08-30 06:05:38,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:05:38,882 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:38,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:05:38,883 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:05:38,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 06:05:38,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:05:38,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:05:38,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:05:38,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:05:38,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:05:39,002 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 06:05:39,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 06:05:39,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 06:05:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:05:39,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:05:39,034 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:05:39,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [998852527] [2023-08-30 06:05:39,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [998852527] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:05:39,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:05:39,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:05:39,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205539342] [2023-08-30 06:05:39,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:05:39,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:05:39,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:05:39,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:05:39,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:05:39,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 251 [2023-08-30 06:05:39,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 32 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:39,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:05:39,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 251 [2023-08-30 06:05:39,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:05:39,286 INFO L130 PetriNetUnfolder]: 567/870 cut-off events. [2023-08-30 06:05:39,287 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 06:05:39,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1780 conditions, 870 events. 567/870 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 4220 event pairs, 282 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 1764. Up to 852 conditions per place. [2023-08-30 06:05:39,292 INFO L137 encePairwiseOnDemand]: 248/251 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-30 06:05:39,292 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 30 transitions, 167 flow [2023-08-30 06:05:39,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:05:39,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:05:39,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2023-08-30 06:05:39,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46215139442231074 [2023-08-30 06:05:39,295 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 348 transitions. [2023-08-30 06:05:39,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 348 transitions. [2023-08-30 06:05:39,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:05:39,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 348 transitions. [2023-08-30 06:05:39,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:39,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:39,305 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:39,305 INFO L175 Difference]: Start difference. First operand has 41 places, 32 transitions, 115 flow. Second operand 3 states and 348 transitions. [2023-08-30 06:05:39,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 30 transitions, 167 flow [2023-08-30 06:05:39,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 166 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:05:39,308 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 112 flow [2023-08-30 06:05:39,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-30 06:05:39,309 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-08-30 06:05:39,309 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 112 flow [2023-08-30 06:05:39,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:39,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:05:39,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:05:39,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 06:05:39,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:39,520 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:05:39,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:05:39,520 INFO L85 PathProgramCache]: Analyzing trace with hash 555876363, now seen corresponding path program 1 times [2023-08-30 06:05:39,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:05:39,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542722933] [2023-08-30 06:05:39,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:05:39,521 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:39,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:05:39,523 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:05:39,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 06:05:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:05:39,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 06:05:39,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:05:39,618 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 06:05:39,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 06:05:39,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:05:39,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:05:39,642 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:05:39,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542722933] [2023-08-30 06:05:39,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542722933] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:05:39,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:05:39,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:05:39,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866084698] [2023-08-30 06:05:39,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:05:39,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:05:39,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:05:39,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:05:39,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:05:39,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 251 [2023-08-30 06:05:39,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:39,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:05:39,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 251 [2023-08-30 06:05:39,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:05:39,946 INFO L130 PetriNetUnfolder]: 378/603 cut-off events. [2023-08-30 06:05:39,946 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 06:05:39,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1247 conditions, 603 events. 378/603 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2769 event pairs, 189 based on Foata normal form. 0/348 useless extension candidates. Maximal degree in co-relation 1230. Up to 581 conditions per place. [2023-08-30 06:05:39,950 INFO L137 encePairwiseOnDemand]: 247/251 looper letters, 22 selfloop transitions, 4 changer transitions 0/28 dead transitions. [2023-08-30 06:05:39,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 28 transitions, 160 flow [2023-08-30 06:05:39,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:05:39,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:05:39,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 438 transitions. [2023-08-30 06:05:39,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4362549800796813 [2023-08-30 06:05:39,952 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 438 transitions. [2023-08-30 06:05:39,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 438 transitions. [2023-08-30 06:05:39,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:05:39,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 438 transitions. [2023-08-30 06:05:39,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:39,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 251.0) internal successors, (1255), 5 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:39,957 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 251.0) internal successors, (1255), 5 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:39,957 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 112 flow. Second operand 4 states and 438 transitions. [2023-08-30 06:05:39,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 28 transitions, 160 flow [2023-08-30 06:05:39,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 28 transitions, 159 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:05:39,959 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 115 flow [2023-08-30 06:05:39,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-08-30 06:05:39,961 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-08-30 06:05:39,962 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 115 flow [2023-08-30 06:05:39,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:39,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:05:39,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:05:39,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 06:05:40,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:40,177 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:05:40,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:05:40,178 INFO L85 PathProgramCache]: Analyzing trace with hash 555876364, now seen corresponding path program 1 times [2023-08-30 06:05:40,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:05:40,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97675166] [2023-08-30 06:05:40,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:05:40,179 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:40,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:05:40,180 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:05:40,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 06:05:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:05:40,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 06:05:40,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:05:40,294 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:05:40,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:05:40,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:05:40,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:05:40,371 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:05:40,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97675166] [2023-08-30 06:05:40,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97675166] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:05:40,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:05:40,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:05:40,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265817720] [2023-08-30 06:05:40,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:05:40,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:05:40,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:05:40,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:05:40,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:05:40,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 251 [2023-08-30 06:05:40,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 115 flow. Second operand has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:40,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:05:40,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 251 [2023-08-30 06:05:40,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:05:40,916 INFO L130 PetriNetUnfolder]: 564/933 cut-off events. [2023-08-30 06:05:40,917 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-08-30 06:05:40,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1931 conditions, 933 events. 564/933 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 4641 event pairs, 177 based on Foata normal form. 0/603 useless extension candidates. Maximal degree in co-relation 1913. Up to 548 conditions per place. [2023-08-30 06:05:40,922 INFO L137 encePairwiseOnDemand]: 246/251 looper letters, 35 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2023-08-30 06:05:40,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 228 flow [2023-08-30 06:05:40,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:05:40,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:05:40,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 551 transitions. [2023-08-30 06:05:40,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43904382470119524 [2023-08-30 06:05:40,925 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 551 transitions. [2023-08-30 06:05:40,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 551 transitions. [2023-08-30 06:05:40,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:05:40,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 551 transitions. [2023-08-30 06:05:40,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:40,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:40,929 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:40,929 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 115 flow. Second operand 5 states and 551 transitions. [2023-08-30 06:05:40,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 228 flow [2023-08-30 06:05:40,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 42 transitions, 223 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:05:40,931 INFO L231 Difference]: Finished difference. Result has 43 places, 29 transitions, 130 flow [2023-08-30 06:05:40,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=130, PETRI_PLACES=43, PETRI_TRANSITIONS=29} [2023-08-30 06:05:40,932 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2023-08-30 06:05:40,932 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 29 transitions, 130 flow [2023-08-30 06:05:40,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:40,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:05:40,933 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:05:40,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 06:05:41,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:41,143 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:05:41,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:05:41,143 INFO L85 PathProgramCache]: Analyzing trace with hash 57742587, now seen corresponding path program 2 times [2023-08-30 06:05:41,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:05:41,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969816141] [2023-08-30 06:05:41,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:05:41,143 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:41,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:05:41,145 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:05:41,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 06:05:41,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:05:41,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:05:41,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:05:41,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:05:41,281 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:05:41,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:05:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:05:41,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:05:41,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:05:41,951 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:05:41,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969816141] [2023-08-30 06:05:41,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969816141] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:05:41,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:05:41,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:05:41,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55046901] [2023-08-30 06:05:41,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:05:41,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:05:41,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:05:41,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:05:41,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:05:44,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 251 [2023-08-30 06:05:44,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 29 transitions, 130 flow. Second operand has 12 states, 12 states have (on average 105.0) internal successors, (1260), 12 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:44,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:05:44,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 251 [2023-08-30 06:05:44,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:05:47,088 INFO L130 PetriNetUnfolder]: 1642/2754 cut-off events. [2023-08-30 06:05:47,088 INFO L131 PetriNetUnfolder]: For 290/390 co-relation queries the response was YES. [2023-08-30 06:05:47,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6104 conditions, 2754 events. 1642/2754 cut-off events. For 290/390 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 16894 event pairs, 1040 based on Foata normal form. 106/1969 useless extension candidates. Maximal degree in co-relation 6085. Up to 351 conditions per place. [2023-08-30 06:05:47,105 INFO L137 encePairwiseOnDemand]: 247/251 looper letters, 182 selfloop transitions, 12 changer transitions 0/196 dead transitions. [2023-08-30 06:05:47,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 196 transitions, 1031 flow [2023-08-30 06:05:47,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 06:05:47,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 06:05:47,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1438 transitions. [2023-08-30 06:05:47,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47742363877822047 [2023-08-30 06:05:47,112 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1438 transitions. [2023-08-30 06:05:47,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1438 transitions. [2023-08-30 06:05:47,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:05:47,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1438 transitions. [2023-08-30 06:05:47,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 119.83333333333333) internal successors, (1438), 12 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:47,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 251.0) internal successors, (3263), 13 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:47,121 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 251.0) internal successors, (3263), 13 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:47,121 INFO L175 Difference]: Start difference. First operand has 43 places, 29 transitions, 130 flow. Second operand 12 states and 1438 transitions. [2023-08-30 06:05:47,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 196 transitions, 1031 flow [2023-08-30 06:05:47,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 196 transitions, 996 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 06:05:47,126 INFO L231 Difference]: Finished difference. Result has 58 places, 36 transitions, 219 flow [2023-08-30 06:05:47,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=219, PETRI_PLACES=58, PETRI_TRANSITIONS=36} [2023-08-30 06:05:47,128 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 20 predicate places. [2023-08-30 06:05:47,128 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 36 transitions, 219 flow [2023-08-30 06:05:47,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 105.0) internal successors, (1260), 12 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:47,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:05:47,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:05:47,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 06:05:47,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:47,341 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:05:47,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:05:47,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1621259161, now seen corresponding path program 1 times [2023-08-30 06:05:47,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:05:47,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727220628] [2023-08-30 06:05:47,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:05:47,342 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:47,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:05:47,342 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:05:47,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 06:05:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:05:47,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 06:05:47,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:05:47,466 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:05:47,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:05:47,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:05:47,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:05:47,579 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:05:47,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727220628] [2023-08-30 06:05:47,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727220628] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:05:47,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:05:47,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 06:05:47,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295759545] [2023-08-30 06:05:47,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:05:47,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:05:47,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:05:47,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:05:47,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:05:47,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 251 [2023-08-30 06:05:47,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 36 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:47,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:05:47,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 251 [2023-08-30 06:05:47,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:05:48,366 INFO L130 PetriNetUnfolder]: 1655/2790 cut-off events. [2023-08-30 06:05:48,367 INFO L131 PetriNetUnfolder]: For 348/348 co-relation queries the response was YES. [2023-08-30 06:05:48,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6163 conditions, 2790 events. 1655/2790 cut-off events. For 348/348 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16405 event pairs, 1063 based on Foata normal form. 0/1927 useless extension candidates. Maximal degree in co-relation 6137. Up to 2696 conditions per place. [2023-08-30 06:05:48,393 INFO L137 encePairwiseOnDemand]: 245/251 looper letters, 49 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2023-08-30 06:05:48,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 373 flow [2023-08-30 06:05:48,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:05:48,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:05:48,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 558 transitions. [2023-08-30 06:05:48,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4446215139442231 [2023-08-30 06:05:48,397 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 558 transitions. [2023-08-30 06:05:48,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 558 transitions. [2023-08-30 06:05:48,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:05:48,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 558 transitions. [2023-08-30 06:05:48,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.6) internal successors, (558), 5 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:48,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:48,402 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:48,402 INFO L175 Difference]: Start difference. First operand has 58 places, 36 transitions, 219 flow. Second operand 5 states and 558 transitions. [2023-08-30 06:05:48,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 373 flow [2023-08-30 06:05:48,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 54 transitions, 348 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 06:05:48,405 INFO L231 Difference]: Finished difference. Result has 61 places, 38 transitions, 229 flow [2023-08-30 06:05:48,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=61, PETRI_TRANSITIONS=38} [2023-08-30 06:05:48,406 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 23 predicate places. [2023-08-30 06:05:48,406 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 38 transitions, 229 flow [2023-08-30 06:05:48,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:48,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:05:48,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:05:48,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 06:05:48,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:48,617 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:05:48,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:05:48,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1625249170, now seen corresponding path program 1 times [2023-08-30 06:05:48,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:05:48,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206171721] [2023-08-30 06:05:48,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:05:48,618 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:48,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:05:48,619 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:05:48,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 06:05:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:05:48,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 06:05:48,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:05:48,744 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:05:48,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:05:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:05:48,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:05:48,832 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:05:48,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206171721] [2023-08-30 06:05:48,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [206171721] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:05:48,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:05:48,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:05:48,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17272038] [2023-08-30 06:05:48,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:05:48,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:05:48,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:05:48,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:05:48,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:05:49,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 251 [2023-08-30 06:05:49,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 38 transitions, 229 flow. Second operand has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:49,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:05:49,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 251 [2023-08-30 06:05:49,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:05:49,517 INFO L130 PetriNetUnfolder]: 1988/3574 cut-off events. [2023-08-30 06:05:49,517 INFO L131 PetriNetUnfolder]: For 1334/1458 co-relation queries the response was YES. [2023-08-30 06:05:49,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8905 conditions, 3574 events. 1988/3574 cut-off events. For 1334/1458 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 23903 event pairs, 1029 based on Foata normal form. 124/3482 useless extension candidates. Maximal degree in co-relation 8875. Up to 2274 conditions per place. [2023-08-30 06:05:49,536 INFO L137 encePairwiseOnDemand]: 246/251 looper letters, 41 selfloop transitions, 8 changer transitions 0/51 dead transitions. [2023-08-30 06:05:49,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 51 transitions, 367 flow [2023-08-30 06:05:49,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:05:49,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:05:49,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 549 transitions. [2023-08-30 06:05:49,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43745019920318723 [2023-08-30 06:05:49,547 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 549 transitions. [2023-08-30 06:05:49,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 549 transitions. [2023-08-30 06:05:49,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:05:49,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 549 transitions. [2023-08-30 06:05:49,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:49,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:49,551 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:49,551 INFO L175 Difference]: Start difference. First operand has 61 places, 38 transitions, 229 flow. Second operand 5 states and 549 transitions. [2023-08-30 06:05:49,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 51 transitions, 367 flow [2023-08-30 06:05:49,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 51 transitions, 357 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 06:05:49,554 INFO L231 Difference]: Finished difference. Result has 64 places, 39 transitions, 243 flow [2023-08-30 06:05:49,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=243, PETRI_PLACES=64, PETRI_TRANSITIONS=39} [2023-08-30 06:05:49,555 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2023-08-30 06:05:49,556 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 39 transitions, 243 flow [2023-08-30 06:05:49,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:49,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:05:49,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:05:49,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 06:05:49,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:49,766 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:05:49,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:05:49,767 INFO L85 PathProgramCache]: Analyzing trace with hash -512666904, now seen corresponding path program 1 times [2023-08-30 06:05:49,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:05:49,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049535553] [2023-08-30 06:05:49,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:05:49,767 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:49,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:05:49,768 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:05:49,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 06:05:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:05:49,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 06:05:49,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:05:49,904 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:05:49,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:05:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:05:50,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:05:50,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:05:50,430 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:05:50,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049535553] [2023-08-30 06:05:50,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049535553] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:05:50,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:05:50,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:05:50,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926745501] [2023-08-30 06:05:50,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:05:50,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:05:50,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:05:50,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:05:50,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:05:52,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 251 [2023-08-30 06:05:52,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 39 transitions, 243 flow. Second operand has 12 states, 12 states have (on average 101.33333333333333) internal successors, (1216), 12 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:52,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:05:52,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 251 [2023-08-30 06:05:52,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:05:54,391 INFO L130 PetriNetUnfolder]: 4049/7201 cut-off events. [2023-08-30 06:05:54,392 INFO L131 PetriNetUnfolder]: For 3412/3762 co-relation queries the response was YES. [2023-08-30 06:05:54,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19559 conditions, 7201 events. 4049/7201 cut-off events. For 3412/3762 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 51438 event pairs, 437 based on Foata normal form. 854/8055 useless extension candidates. Maximal degree in co-relation 19528. Up to 1549 conditions per place. [2023-08-30 06:05:54,428 INFO L137 encePairwiseOnDemand]: 243/251 looper letters, 95 selfloop transitions, 18 changer transitions 0/114 dead transitions. [2023-08-30 06:05:54,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 114 transitions, 713 flow [2023-08-30 06:05:54,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 06:05:54,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 06:05:54,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1095 transitions. [2023-08-30 06:05:54,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4362549800796813 [2023-08-30 06:05:54,433 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1095 transitions. [2023-08-30 06:05:54,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1095 transitions. [2023-08-30 06:05:54,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:05:54,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1095 transitions. [2023-08-30 06:05:54,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 109.5) internal successors, (1095), 10 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:54,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 251.0) internal successors, (2761), 11 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:54,440 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 251.0) internal successors, (2761), 11 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:54,440 INFO L175 Difference]: Start difference. First operand has 64 places, 39 transitions, 243 flow. Second operand 10 states and 1095 transitions. [2023-08-30 06:05:54,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 114 transitions, 713 flow [2023-08-30 06:05:54,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 114 transitions, 693 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 06:05:54,445 INFO L231 Difference]: Finished difference. Result has 77 places, 47 transitions, 346 flow [2023-08-30 06:05:54,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=346, PETRI_PLACES=77, PETRI_TRANSITIONS=47} [2023-08-30 06:05:54,446 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 39 predicate places. [2023-08-30 06:05:54,446 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 47 transitions, 346 flow [2023-08-30 06:05:54,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.33333333333333) internal successors, (1216), 12 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:54,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:05:54,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:05:54,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 06:05:54,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:54,657 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:05:54,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:05:54,658 INFO L85 PathProgramCache]: Analyzing trace with hash 787792779, now seen corresponding path program 1 times [2023-08-30 06:05:54,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:05:54,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664940006] [2023-08-30 06:05:54,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:05:54,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:05:54,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:05:54,659 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:05:54,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 06:05:54,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:05:54,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 06:05:54,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:05:54,790 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:05:54,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:05:54,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:05:54,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:05:55,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:05:55,347 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:05:55,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [664940006] [2023-08-30 06:05:55,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [664940006] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:05:55,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:05:55,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:05:55,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747706041] [2023-08-30 06:05:55,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:05:55,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:05:55,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:05:55,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:05:55,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:05:57,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 251 [2023-08-30 06:05:57,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 47 transitions, 346 flow. Second operand has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:57,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:05:57,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 251 [2023-08-30 06:05:57,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:06:00,002 INFO L130 PetriNetUnfolder]: 8954/15778 cut-off events. [2023-08-30 06:06:00,003 INFO L131 PetriNetUnfolder]: For 39795/40806 co-relation queries the response was YES. [2023-08-30 06:06:00,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57777 conditions, 15778 events. 8954/15778 cut-off events. For 39795/40806 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 122089 event pairs, 1218 based on Foata normal form. 2235/17995 useless extension candidates. Maximal degree in co-relation 57739. Up to 3997 conditions per place. [2023-08-30 06:06:00,114 INFO L137 encePairwiseOnDemand]: 243/251 looper letters, 132 selfloop transitions, 25 changer transitions 0/159 dead transitions. [2023-08-30 06:06:00,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 159 transitions, 1394 flow [2023-08-30 06:06:00,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 06:06:00,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 06:06:00,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1087 transitions. [2023-08-30 06:06:00,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43306772908366536 [2023-08-30 06:06:00,119 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1087 transitions. [2023-08-30 06:06:00,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1087 transitions. [2023-08-30 06:06:00,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:06:00,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1087 transitions. [2023-08-30 06:06:00,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 108.7) internal successors, (1087), 10 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:00,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 251.0) internal successors, (2761), 11 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:00,126 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 251.0) internal successors, (2761), 11 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:00,126 INFO L175 Difference]: Start difference. First operand has 77 places, 47 transitions, 346 flow. Second operand 10 states and 1087 transitions. [2023-08-30 06:06:00,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 159 transitions, 1394 flow [2023-08-30 06:06:00,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 159 transitions, 1302 flow, removed 38 selfloop flow, removed 3 redundant places. [2023-08-30 06:06:00,164 INFO L231 Difference]: Finished difference. Result has 90 places, 63 transitions, 561 flow [2023-08-30 06:06:00,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=561, PETRI_PLACES=90, PETRI_TRANSITIONS=63} [2023-08-30 06:06:00,165 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 52 predicate places. [2023-08-30 06:06:00,165 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 63 transitions, 561 flow [2023-08-30 06:06:00,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:00,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:06:00,166 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 06:06:00,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 06:06:00,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:06:00,376 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:06:00,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:06:00,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1270287195, now seen corresponding path program 3 times [2023-08-30 06:06:00,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:06:00,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543391241] [2023-08-30 06:06:00,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:06:00,376 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:06:00,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:06:00,377 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:06:00,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 06:06:00,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 06:06:00,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:06:00,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:06:00,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:06:00,672 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:06:00,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:06:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:06:00,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:06:02,792 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:06:02,792 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:06:02,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543391241] [2023-08-30 06:06:02,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543391241] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:06:02,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:06:02,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 06:06:02,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51225411] [2023-08-30 06:06:02,793 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:06:02,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 06:06:02,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:06:02,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 06:06:02,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 06:06:11,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 251 [2023-08-30 06:06:11,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 63 transitions, 561 flow. Second operand has 24 states, 24 states have (on average 105.0) internal successors, (2520), 24 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:11,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:06:11,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 251 [2023-08-30 06:06:11,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:06:30,116 INFO L130 PetriNetUnfolder]: 19982/35274 cut-off events. [2023-08-30 06:06:30,116 INFO L131 PetriNetUnfolder]: For 174740/179239 co-relation queries the response was YES. [2023-08-30 06:06:30,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165475 conditions, 35274 events. 19982/35274 cut-off events. For 174740/179239 co-relation queries the response was YES. Maximal size of possible extension queue 847. Compared 291642 event pairs, 14604 based on Foata normal form. 4301/39575 useless extension candidates. Maximal degree in co-relation 165430. Up to 8821 conditions per place. [2023-08-30 06:06:30,506 INFO L137 encePairwiseOnDemand]: 247/251 looper letters, 916 selfloop transitions, 24 changer transitions 0/943 dead transitions. [2023-08-30 06:06:30,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 943 transitions, 9868 flow [2023-08-30 06:06:30,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 06:06:30,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 06:06:30,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2902 transitions. [2023-08-30 06:06:30,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817397078353254 [2023-08-30 06:06:30,516 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2902 transitions. [2023-08-30 06:06:30,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2902 transitions. [2023-08-30 06:06:30,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:06:30,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2902 transitions. [2023-08-30 06:06:30,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 120.91666666666667) internal successors, (2902), 24 states have internal predecessors, (2902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:30,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 251.0) internal successors, (6275), 25 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:30,545 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 251.0) internal successors, (6275), 25 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:30,546 INFO L175 Difference]: Start difference. First operand has 90 places, 63 transitions, 561 flow. Second operand 24 states and 2902 transitions. [2023-08-30 06:06:30,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 943 transitions, 9868 flow [2023-08-30 06:06:30,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 943 transitions, 9569 flow, removed 126 selfloop flow, removed 3 redundant places. [2023-08-30 06:06:30,823 INFO L231 Difference]: Finished difference. Result has 123 places, 76 transitions, 730 flow [2023-08-30 06:06:30,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=730, PETRI_PLACES=123, PETRI_TRANSITIONS=76} [2023-08-30 06:06:30,824 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 85 predicate places. [2023-08-30 06:06:30,824 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 76 transitions, 730 flow [2023-08-30 06:06:30,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 105.0) internal successors, (2520), 24 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:30,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:06:30,826 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 06:06:30,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 06:06:31,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:06:31,038 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:06:31,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:06:31,038 INFO L85 PathProgramCache]: Analyzing trace with hash -611657009, now seen corresponding path program 2 times [2023-08-30 06:06:31,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:06:31,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301528949] [2023-08-30 06:06:31,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:06:31,039 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:06:31,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:06:31,040 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:06:31,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 06:06:31,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:06:31,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:06:31,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:06:31,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:06:31,212 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:06:31,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:06:31,482 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:06:31,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:06:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:06:32,505 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:06:32,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301528949] [2023-08-30 06:06:32,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301528949] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:06:32,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:06:32,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2023-08-30 06:06:32,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050952085] [2023-08-30 06:06:32,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:06:32,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 06:06:32,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:06:32,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 06:06:32,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-08-30 06:06:38,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 251 [2023-08-30 06:06:38,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 76 transitions, 730 flow. Second operand has 18 states, 18 states have (on average 100.55555555555556) internal successors, (1810), 18 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:38,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:06:38,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 251 [2023-08-30 06:06:38,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:06:51,978 INFO L130 PetriNetUnfolder]: 20858/37062 cut-off events. [2023-08-30 06:06:51,978 INFO L131 PetriNetUnfolder]: For 169312/171494 co-relation queries the response was YES. [2023-08-30 06:06:52,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169247 conditions, 37062 events. 20858/37062 cut-off events. For 169312/171494 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 309551 event pairs, 9558 based on Foata normal form. 2285/39347 useless extension candidates. Maximal degree in co-relation 169189. Up to 23890 conditions per place. [2023-08-30 06:06:52,437 INFO L137 encePairwiseOnDemand]: 242/251 looper letters, 336 selfloop transitions, 55 changer transitions 0/392 dead transitions. [2023-08-30 06:06:52,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 392 transitions, 3744 flow [2023-08-30 06:06:52,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 06:06:52,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 06:06:52,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2491 transitions. [2023-08-30 06:06:52,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314914256019401 [2023-08-30 06:06:52,446 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2491 transitions. [2023-08-30 06:06:52,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2491 transitions. [2023-08-30 06:06:52,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:06:52,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2491 transitions. [2023-08-30 06:06:52,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 108.30434782608695) internal successors, (2491), 23 states have internal predecessors, (2491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:52,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 251.0) internal successors, (6024), 24 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:52,462 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 251.0) internal successors, (6024), 24 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:52,462 INFO L175 Difference]: Start difference. First operand has 123 places, 76 transitions, 730 flow. Second operand 23 states and 2491 transitions. [2023-08-30 06:06:52,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 392 transitions, 3744 flow [2023-08-30 06:06:52,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 392 transitions, 3696 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-08-30 06:06:52,734 INFO L231 Difference]: Finished difference. Result has 137 places, 113 transitions, 1211 flow [2023-08-30 06:06:52,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1211, PETRI_PLACES=137, PETRI_TRANSITIONS=113} [2023-08-30 06:06:52,734 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 99 predicate places. [2023-08-30 06:06:52,735 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 113 transitions, 1211 flow [2023-08-30 06:06:52,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 100.55555555555556) internal successors, (1810), 18 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:52,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:06:52,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:06:52,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 06:06:52,947 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 [2023-08-30 06:06:52,948 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:06:52,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:06:52,948 INFO L85 PathProgramCache]: Analyzing trace with hash -122731005, now seen corresponding path program 1 times [2023-08-30 06:06:52,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:06:52,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60716802] [2023-08-30 06:06:52,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:06:52,949 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 [2023-08-30 06:06:52,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:06:52,951 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:06:52,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 06:06:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:06:53,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:06:53,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:06:53,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:06:53,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:06:53,037 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:06:53,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60716802] [2023-08-30 06:06:53,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60716802] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:06:53,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:06:53,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:06:53,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765255955] [2023-08-30 06:06:53,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:06:53,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:06:53,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:06:53,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:06:53,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:06:53,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 251 [2023-08-30 06:06:53,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 113 transitions, 1211 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:53,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:06:53,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 251 [2023-08-30 06:06:53,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:06:58,651 INFO L130 PetriNetUnfolder]: 20096/35738 cut-off events. [2023-08-30 06:06:58,651 INFO L131 PetriNetUnfolder]: For 183706/188390 co-relation queries the response was YES. [2023-08-30 06:06:58,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172367 conditions, 35738 events. 20096/35738 cut-off events. For 183706/188390 co-relation queries the response was YES. Maximal size of possible extension queue 909. Compared 300069 event pairs, 7209 based on Foata normal form. 4100/39756 useless extension candidates. Maximal degree in co-relation 172306. Up to 33858 conditions per place. [2023-08-30 06:06:59,102 INFO L137 encePairwiseOnDemand]: 247/251 looper letters, 121 selfloop transitions, 5 changer transitions 3/133 dead transitions. [2023-08-30 06:06:59,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 133 transitions, 1645 flow [2023-08-30 06:06:59,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:06:59,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:06:59,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2023-08-30 06:06:59,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4860557768924303 [2023-08-30 06:06:59,105 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2023-08-30 06:06:59,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2023-08-30 06:06:59,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:06:59,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2023-08-30 06:06:59,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:59,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:59,107 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:59,107 INFO L175 Difference]: Start difference. First operand has 137 places, 113 transitions, 1211 flow. Second operand 3 states and 366 transitions. [2023-08-30 06:06:59,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 133 transitions, 1645 flow [2023-08-30 06:06:59,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 133 transitions, 1575 flow, removed 22 selfloop flow, removed 9 redundant places. [2023-08-30 06:06:59,606 INFO L231 Difference]: Finished difference. Result has 131 places, 115 transitions, 1182 flow [2023-08-30 06:06:59,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1182, PETRI_PLACES=131, PETRI_TRANSITIONS=115} [2023-08-30 06:06:59,607 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 93 predicate places. [2023-08-30 06:06:59,607 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 115 transitions, 1182 flow [2023-08-30 06:06:59,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:59,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:06:59,608 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:06:59,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 06:06:59,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:06:59,815 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:06:59,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:06:59,816 INFO L85 PathProgramCache]: Analyzing trace with hash -268115831, now seen corresponding path program 2 times [2023-08-30 06:06:59,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:06:59,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911142385] [2023-08-30 06:06:59,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:06:59,816 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:06:59,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:06:59,818 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:06:59,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 06:06:59,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:06:59,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:06:59,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:06:59,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:06:59,979 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:06:59,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:07:00,247 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:07:00,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:07:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:07:01,364 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:07:01,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911142385] [2023-08-30 06:07:01,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911142385] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:07:01,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:07:01,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2023-08-30 06:07:01,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114126483] [2023-08-30 06:07:01,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:07:01,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 06:07:01,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:07:01,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 06:07:01,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-08-30 06:07:07,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 251 [2023-08-30 06:07:07,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 115 transitions, 1182 flow. Second operand has 18 states, 18 states have (on average 100.77777777777777) internal successors, (1814), 18 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:07,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:07:07,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 251 [2023-08-30 06:07:07,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:07:19,523 INFO L130 PetriNetUnfolder]: 19663/34993 cut-off events. [2023-08-30 06:07:19,523 INFO L131 PetriNetUnfolder]: For 185357/187761 co-relation queries the response was YES. [2023-08-30 06:07:19,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169719 conditions, 34993 events. 19663/34993 cut-off events. For 185357/187761 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 292214 event pairs, 9686 based on Foata normal form. 1882/36875 useless extension candidates. Maximal degree in co-relation 169660. Up to 22720 conditions per place. [2023-08-30 06:07:19,853 INFO L137 encePairwiseOnDemand]: 242/251 looper letters, 346 selfloop transitions, 53 changer transitions 0/402 dead transitions. [2023-08-30 06:07:19,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 402 transitions, 4492 flow [2023-08-30 06:07:19,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 06:07:19,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 06:07:19,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2259 transitions. [2023-08-30 06:07:19,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-08-30 06:07:19,859 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2259 transitions. [2023-08-30 06:07:19,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2259 transitions. [2023-08-30 06:07:19,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:07:19,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2259 transitions. [2023-08-30 06:07:19,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 107.57142857142857) internal successors, (2259), 21 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:19,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 251.0) internal successors, (5522), 22 states have internal predecessors, (5522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:19,868 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 251.0) internal successors, (5522), 22 states have internal predecessors, (5522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:19,868 INFO L175 Difference]: Start difference. First operand has 131 places, 115 transitions, 1182 flow. Second operand 21 states and 2259 transitions. [2023-08-30 06:07:19,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 402 transitions, 4492 flow [2023-08-30 06:07:20,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 402 transitions, 4376 flow, removed 52 selfloop flow, removed 2 redundant places. [2023-08-30 06:07:20,448 INFO L231 Difference]: Finished difference. Result has 147 places, 143 transitions, 1525 flow [2023-08-30 06:07:20,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1525, PETRI_PLACES=147, PETRI_TRANSITIONS=143} [2023-08-30 06:07:20,448 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 109 predicate places. [2023-08-30 06:07:20,448 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 143 transitions, 1525 flow [2023-08-30 06:07:20,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 100.77777777777777) internal successors, (1814), 18 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:20,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:07:20,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:07:20,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-08-30 06:07:20,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:07:20,649 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:07:20,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:07:20,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1302554009, now seen corresponding path program 1 times [2023-08-30 06:07:20,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:07:20,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093788229] [2023-08-30 06:07:20,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:07:20,650 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:07:20,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:07:20,651 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:07:20,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 06:07:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:07:20,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:07:20,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:07:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:07:20,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:07:20,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:07:20,970 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:07:20,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093788229] [2023-08-30 06:07:20,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093788229] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:07:20,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:07:20,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-30 06:07:20,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647284736] [2023-08-30 06:07:20,970 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:07:20,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 06:07:20,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:07:20,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 06:07:20,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-08-30 06:07:21,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 251 [2023-08-30 06:07:21,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 143 transitions, 1525 flow. Second operand has 13 states, 13 states have (on average 106.46153846153847) internal successors, (1384), 13 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:21,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:07:21,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 251 [2023-08-30 06:07:21,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:07:26,695 INFO L130 PetriNetUnfolder]: 20330/35994 cut-off events. [2023-08-30 06:07:26,695 INFO L131 PetriNetUnfolder]: For 179565/179565 co-relation queries the response was YES. [2023-08-30 06:07:26,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179048 conditions, 35994 events. 20330/35994 cut-off events. For 179565/179565 co-relation queries the response was YES. Maximal size of possible extension queue 837. Compared 295186 event pairs, 754 based on Foata normal form. 670/36664 useless extension candidates. Maximal degree in co-relation 178988. Up to 10994 conditions per place. [2023-08-30 06:07:27,072 INFO L137 encePairwiseOnDemand]: 241/251 looper letters, 174 selfloop transitions, 192 changer transitions 0/366 dead transitions. [2023-08-30 06:07:27,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 366 transitions, 4346 flow [2023-08-30 06:07:27,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 06:07:27,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 06:07:27,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1673 transitions. [2023-08-30 06:07:27,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44435590969455513 [2023-08-30 06:07:27,075 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1673 transitions. [2023-08-30 06:07:27,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1673 transitions. [2023-08-30 06:07:27,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:07:27,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1673 transitions. [2023-08-30 06:07:27,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 111.53333333333333) internal successors, (1673), 15 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:27,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 251.0) internal successors, (4016), 16 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:27,079 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 251.0) internal successors, (4016), 16 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:27,079 INFO L175 Difference]: Start difference. First operand has 147 places, 143 transitions, 1525 flow. Second operand 15 states and 1673 transitions. [2023-08-30 06:07:27,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 366 transitions, 4346 flow [2023-08-30 06:07:27,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 366 transitions, 4272 flow, removed 28 selfloop flow, removed 5 redundant places. [2023-08-30 06:07:27,922 INFO L231 Difference]: Finished difference. Result has 166 places, 280 transitions, 3706 flow [2023-08-30 06:07:27,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=1479, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3706, PETRI_PLACES=166, PETRI_TRANSITIONS=280} [2023-08-30 06:07:27,923 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 128 predicate places. [2023-08-30 06:07:27,923 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 280 transitions, 3706 flow [2023-08-30 06:07:27,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 106.46153846153847) internal successors, (1384), 13 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:27,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:07:27,924 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2023-08-30 06:07:27,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 06:07:28,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:07:28,125 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:07:28,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:07:28,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1085014400, now seen corresponding path program 3 times [2023-08-30 06:07:28,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:07:28,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819389128] [2023-08-30 06:07:28,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:07:28,125 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:07:28,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:07:28,128 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:07:28,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 06:07:28,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-30 06:07:28,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:07:28,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:07:28,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:07:28,415 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:07:28,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:07:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 06:07:28,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:07:29,835 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 06:07:29,835 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:07:29,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819389128] [2023-08-30 06:07:29,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819389128] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:07:29,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:07:29,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 06:07:29,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052688727] [2023-08-30 06:07:29,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:07:29,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 06:07:29,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:07:29,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 06:07:29,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-08-30 06:07:35,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 251 [2023-08-30 06:07:35,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 280 transitions, 3706 flow. Second operand has 18 states, 18 states have (on average 101.55555555555556) internal successors, (1828), 18 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:35,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:07:35,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 251 [2023-08-30 06:07:35,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:07:57,921 INFO L130 PetriNetUnfolder]: 45839/84757 cut-off events. [2023-08-30 06:07:57,921 INFO L131 PetriNetUnfolder]: For 755181/764048 co-relation queries the response was YES. [2023-08-30 06:07:58,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492074 conditions, 84757 events. 45839/84757 cut-off events. For 755181/764048 co-relation queries the response was YES. Maximal size of possible extension queue 1718. Compared 804090 event pairs, 5807 based on Foata normal form. 9297/93939 useless extension candidates. Maximal degree in co-relation 492004. Up to 19635 conditions per place. [2023-08-30 06:07:59,166 INFO L137 encePairwiseOnDemand]: 244/251 looper letters, 640 selfloop transitions, 57 changer transitions 0/714 dead transitions. [2023-08-30 06:07:59,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 714 transitions, 10434 flow [2023-08-30 06:07:59,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 06:07:59,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 06:07:59,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1669 transitions. [2023-08-30 06:07:59,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44329349269588314 [2023-08-30 06:07:59,170 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1669 transitions. [2023-08-30 06:07:59,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1669 transitions. [2023-08-30 06:07:59,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:07:59,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1669 transitions. [2023-08-30 06:07:59,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 111.26666666666667) internal successors, (1669), 15 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:59,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 251.0) internal successors, (4016), 16 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:59,175 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 251.0) internal successors, (4016), 16 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:59,175 INFO L175 Difference]: Start difference. First operand has 166 places, 280 transitions, 3706 flow. Second operand 15 states and 1669 transitions. [2023-08-30 06:07:59,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 714 transitions, 10434 flow [2023-08-30 06:08:06,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 714 transitions, 10064 flow, removed 161 selfloop flow, removed 3 redundant places. [2023-08-30 06:08:06,070 INFO L231 Difference]: Finished difference. Result has 185 places, 301 transitions, 3800 flow [2023-08-30 06:08:06,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=3372, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3800, PETRI_PLACES=185, PETRI_TRANSITIONS=301} [2023-08-30 06:08:06,071 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 147 predicate places. [2023-08-30 06:08:06,071 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 301 transitions, 3800 flow [2023-08-30 06:08:06,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 101.55555555555556) internal successors, (1828), 18 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:08:06,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:08:06,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:08:06,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 06:08:06,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:08:06,272 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:08:06,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:08:06,273 INFO L85 PathProgramCache]: Analyzing trace with hash -988753028, now seen corresponding path program 1 times [2023-08-30 06:08:06,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:08:06,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1483132528] [2023-08-30 06:08:06,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:08:06,273 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:08:06,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:08:06,274 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:08:06,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 06:08:06,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:08:06,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:08:06,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:08:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:08:06,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:08:06,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:08:06,523 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:08:06,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1483132528] [2023-08-30 06:08:06,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1483132528] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:08:06,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:08:06,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-30 06:08:06,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680384765] [2023-08-30 06:08:06,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:08:06,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 06:08:06,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:08:06,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 06:08:06,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-08-30 06:08:06,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 251 [2023-08-30 06:08:06,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 301 transitions, 3800 flow. Second operand has 13 states, 13 states have (on average 106.3076923076923) internal successors, (1382), 13 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:08:06,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:08:06,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 251 [2023-08-30 06:08:06,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:08:24,900 INFO L130 PetriNetUnfolder]: 46898/86196 cut-off events. [2023-08-30 06:08:24,901 INFO L131 PetriNetUnfolder]: For 658358/658358 co-relation queries the response was YES. [2023-08-30 06:08:26,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519133 conditions, 86196 events. 46898/86196 cut-off events. For 658358/658358 co-relation queries the response was YES. Maximal size of possible extension queue 1666. Compared 807639 event pairs, 3421 based on Foata normal form. 510/86706 useless extension candidates. Maximal degree in co-relation 519054. Up to 35469 conditions per place. [2023-08-30 06:08:26,496 INFO L137 encePairwiseOnDemand]: 241/251 looper letters, 280 selfloop transitions, 373 changer transitions 0/653 dead transitions. [2023-08-30 06:08:26,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 653 transitions, 9615 flow [2023-08-30 06:08:26,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 06:08:26,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 06:08:26,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1662 transitions. [2023-08-30 06:08:26,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44143426294820715 [2023-08-30 06:08:26,500 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1662 transitions. [2023-08-30 06:08:26,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1662 transitions. [2023-08-30 06:08:26,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:08:26,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1662 transitions. [2023-08-30 06:08:26,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 110.8) internal successors, (1662), 15 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:08:26,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 251.0) internal successors, (4016), 16 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:08:26,506 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 251.0) internal successors, (4016), 16 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:08:26,506 INFO L175 Difference]: Start difference. First operand has 185 places, 301 transitions, 3800 flow. Second operand 15 states and 1662 transitions. [2023-08-30 06:08:26,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 653 transitions, 9615 flow [2023-08-30 06:08:32,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 653 transitions, 9404 flow, removed 33 selfloop flow, removed 5 redundant places. [2023-08-30 06:08:32,973 INFO L231 Difference]: Finished difference. Result has 205 places, 533 transitions, 8320 flow [2023-08-30 06:08:32,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=3722, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8320, PETRI_PLACES=205, PETRI_TRANSITIONS=533} [2023-08-30 06:08:32,974 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 167 predicate places. [2023-08-30 06:08:32,974 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 533 transitions, 8320 flow [2023-08-30 06:08:32,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 106.3076923076923) internal successors, (1382), 13 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:08:32,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:08:32,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:08:32,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 06:08:33,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:08:33,176 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:08:33,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:08:33,176 INFO L85 PathProgramCache]: Analyzing trace with hash 784803776, now seen corresponding path program 2 times [2023-08-30 06:08:33,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:08:33,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [869766585] [2023-08-30 06:08:33,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:08:33,176 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:08:33,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:08:33,177 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:08:33,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 06:08:33,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:08:33,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:08:33,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 06:08:33,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:08:33,347 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:08:33,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:08:33,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 06:08:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:08:33,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:08:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:08:33,473 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:08:33,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [869766585] [2023-08-30 06:08:33,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [869766585] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 06:08:33,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 06:08:33,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-08-30 06:08:33,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533122649] [2023-08-30 06:08:33,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:08:33,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:08:33,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:08:33,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:08:33,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:08:33,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 251 [2023-08-30 06:08:33,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 533 transitions, 8320 flow. Second operand has 5 states, 5 states have (on average 103.2) internal successors, (516), 5 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:08:33,642 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:08:33,642 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 251 [2023-08-30 06:08:33,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:08:54,898 INFO L130 PetriNetUnfolder]: 44509/81779 cut-off events. [2023-08-30 06:08:54,898 INFO L131 PetriNetUnfolder]: For 909618/915039 co-relation queries the response was YES. [2023-08-30 06:08:56,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559108 conditions, 81779 events. 44509/81779 cut-off events. For 909618/915039 co-relation queries the response was YES. Maximal size of possible extension queue 1620. Compared 766443 event pairs, 18530 based on Foata normal form. 2691/84350 useless extension candidates. Maximal degree in co-relation 559018. Up to 58306 conditions per place. [2023-08-30 06:08:56,430 INFO L137 encePairwiseOnDemand]: 244/251 looper letters, 296 selfloop transitions, 249 changer transitions 0/566 dead transitions. [2023-08-30 06:08:56,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 566 transitions, 9873 flow [2023-08-30 06:08:56,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:08:56,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:08:56,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 531 transitions. [2023-08-30 06:08:56,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4231075697211155 [2023-08-30 06:08:56,432 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 531 transitions. [2023-08-30 06:08:56,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 531 transitions. [2023-08-30 06:08:56,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:08:56,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 531 transitions. [2023-08-30 06:08:56,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.2) internal successors, (531), 5 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:08:56,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:08:56,434 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:08:56,434 INFO L175 Difference]: Start difference. First operand has 205 places, 533 transitions, 8320 flow. Second operand 5 states and 531 transitions. [2023-08-30 06:08:56,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 566 transitions, 9873 flow [2023-08-30 06:09:25,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 566 transitions, 9272 flow, removed 238 selfloop flow, removed 4 redundant places. [2023-08-30 06:09:25,422 INFO L231 Difference]: Finished difference. Result has 206 places, 533 transitions, 8474 flow [2023-08-30 06:09:25,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=7727, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=8474, PETRI_PLACES=206, PETRI_TRANSITIONS=533} [2023-08-30 06:09:25,423 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 168 predicate places. [2023-08-30 06:09:25,423 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 533 transitions, 8474 flow [2023-08-30 06:09:25,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.2) internal successors, (516), 5 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:09:25,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:09:25,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:09:25,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 06:09:25,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:09:25,625 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:09:25,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:09:25,626 INFO L85 PathProgramCache]: Analyzing trace with hash 528147135, now seen corresponding path program 2 times [2023-08-30 06:09:25,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:09:25,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [52651759] [2023-08-30 06:09:25,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:09:25,626 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:09:25,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:09:25,627 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:09:25,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 06:09:25,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:09:25,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:09:25,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 06:09:25,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:09:25,818 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:09:25,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:09:25,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 06:09:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:09:25,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:09:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:09:25,924 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:09:25,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [52651759] [2023-08-30 06:09:25,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [52651759] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 06:09:25,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 06:09:25,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-08-30 06:09:25,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549587883] [2023-08-30 06:09:25,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:09:25,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:09:25,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:09:25,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:09:25,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:09:26,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 251 [2023-08-30 06:09:26,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 533 transitions, 8474 flow. Second operand has 5 states, 5 states have (on average 103.2) internal successors, (516), 5 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:09:26,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:09:26,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 251 [2023-08-30 06:09:26,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:09:47,473 INFO L130 PetriNetUnfolder]: 44719/80641 cut-off events. [2023-08-30 06:09:47,473 INFO L131 PetriNetUnfolder]: For 1024221/1024987 co-relation queries the response was YES. [2023-08-30 06:09:48,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545759 conditions, 80641 events. 44719/80641 cut-off events. For 1024221/1024987 co-relation queries the response was YES. Maximal size of possible extension queue 1539. Compared 737089 event pairs, 13326 based on Foata normal form. 440/81062 useless extension candidates. Maximal degree in co-relation 545668. Up to 43550 conditions per place. [2023-08-30 06:09:49,327 INFO L137 encePairwiseOnDemand]: 244/251 looper letters, 415 selfloop transitions, 160 changer transitions 0/595 dead transitions. [2023-08-30 06:09:49,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 595 transitions, 10802 flow [2023-08-30 06:09:49,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:09:49,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:09:49,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 531 transitions. [2023-08-30 06:09:49,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4231075697211155 [2023-08-30 06:09:49,329 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 531 transitions. [2023-08-30 06:09:49,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 531 transitions. [2023-08-30 06:09:49,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:09:49,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 531 transitions. [2023-08-30 06:09:49,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.2) internal successors, (531), 5 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:09:49,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:09:49,331 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:09:49,332 INFO L175 Difference]: Start difference. First operand has 206 places, 533 transitions, 8474 flow. Second operand 5 states and 531 transitions. [2023-08-30 06:09:49,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 595 transitions, 10802 flow [2023-08-30 06:10:11,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 595 transitions, 10181 flow, removed 44 selfloop flow, removed 8 redundant places. [2023-08-30 06:10:11,962 INFO L231 Difference]: Finished difference. Result has 203 places, 533 transitions, 8409 flow [2023-08-30 06:10:11,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=7929, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=8409, PETRI_PLACES=203, PETRI_TRANSITIONS=533} [2023-08-30 06:10:11,963 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 165 predicate places. [2023-08-30 06:10:11,963 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 533 transitions, 8409 flow [2023-08-30 06:10:11,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.2) internal successors, (516), 5 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:10:11,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:10:11,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:10:11,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 06:10:12,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:10:12,164 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:10:12,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:10:12,165 INFO L85 PathProgramCache]: Analyzing trace with hash 299064887, now seen corresponding path program 1 times [2023-08-30 06:10:12,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:10:12,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1948182463] [2023-08-30 06:10:12,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:10:12,166 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:10:12,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:10:12,166 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:10:12,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 06:10:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:10:12,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 06:10:12,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:10:12,321 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 26 treesize of output 24 [2023-08-30 06:10:12,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 06:10:12,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 32 treesize of output 28 [2023-08-30 06:10:12,514 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 06:10:12,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 46 [2023-08-30 06:10:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:10:12,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:10:13,099 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv3 32) c_~A~0.offset)) (.cse3 (bvadd (_ bv2 32) c_~A~0.offset)) (.cse4 (bvadd c_~A~0.offset (_ bv1 32)))) (and (forall ((v_ArrVal_556 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_556) c_~A~0.base))) (concat (concat (concat (select .cse1 .cse2) (select .cse1 .cse3)) (select .cse1 .cse4)) (select .cse1 c_~A~0.offset))))) (or (= (bvadd |c_thread1Thread1of1ForFork1_~tmp~0#1| (bvneg .cse0)) (_ bv0 32)) (not (bvsle |c_thread1Thread1of1ForFork1_~tmp~0#1| (bvadd .cse0 (_ bv2147483647 32))))))) (forall ((v_ArrVal_556 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse5 (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_556) c_~A~0.base))) (concat (concat (concat (select .cse6 .cse2) (select .cse6 .cse3)) (select .cse6 .cse4)) (select .cse6 c_~A~0.offset))))) (or (= (bvadd |c_thread1Thread1of1ForFork1_~tmp~0#1| (bvneg .cse5)) (_ bv0 32)) (not (bvsge .cse5 (_ bv0 32)))))))) is different from false [2023-08-30 06:10:13,172 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (let ((.cse8 (select |c_#memory_int| c_~A~0.base)) (.cse9 (bvmul (_ bv4 32) |c_thread1Thread1of1ForFork1_~i~0#1|))) (concat (concat (concat (select .cse8 (bvadd .cse9 (_ bv3 32) c_~A~0.offset)) (select .cse8 (bvadd .cse9 (_ bv2 32) c_~A~0.offset))) (select .cse8 (bvadd .cse9 c_~A~0.offset (_ bv1 32)))) (select .cse8 (bvadd .cse9 c_~A~0.offset))))) (.cse3 (bvadd (_ bv3 32) c_~A~0.offset)) (.cse4 (bvadd (_ bv2 32) c_~A~0.offset)) (.cse5 (bvadd c_~A~0.offset (_ bv1 32)))) (and (forall ((v_ArrVal_556 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse1 (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_556) c_~A~0.base))) (concat (concat (concat (select .cse2 .cse3) (select .cse2 .cse4)) (select .cse2 .cse5)) (select .cse2 c_~A~0.offset))))) (or (= (bvadd c_~counter~0 .cse0 (bvneg .cse1)) (_ bv0 32)) (not (bvsge .cse1 (_ bv0 32)))))) (forall ((v_ArrVal_556 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse6 (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_556) c_~A~0.base))) (concat (concat (concat (select .cse7 .cse3) (select .cse7 .cse4)) (select .cse7 .cse5)) (select .cse7 c_~A~0.offset))))) (or (= (bvadd c_~counter~0 .cse0 (bvneg .cse6)) (_ bv0 32)) (not (bvsle (bvadd c_~counter~0 .cse0) (bvadd .cse6 (_ bv2147483647 32))))))))) is different from false [2023-08-30 06:10:13,223 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (bvadd (_ bv3 32) c_~A~0.offset)) (.cse4 (bvadd (_ bv2 32) c_~A~0.offset)) (.cse5 (bvadd c_~A~0.offset (_ bv1 32)))) (let ((.cse1 (let ((.cse8 (select |c_#memory_int| c_~A~0.base))) (concat (concat (concat (select .cse8 .cse3) (select .cse8 .cse4)) (select .cse8 .cse5)) (select .cse8 c_~A~0.offset))))) (and (forall ((v_ArrVal_556 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_556) c_~A~0.base))) (concat (concat (concat (select .cse2 .cse3) (select .cse2 .cse4)) (select .cse2 .cse5)) (select .cse2 c_~A~0.offset))))) (or (not (bvsge .cse0 (_ bv0 32))) (= (bvadd c_~counter~0 .cse1 (bvneg .cse0)) (_ bv0 32))))) (forall ((v_ArrVal_556 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse6 (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_556) c_~A~0.base))) (concat (concat (concat (select .cse7 .cse3) (select .cse7 .cse4)) (select .cse7 .cse5)) (select .cse7 c_~A~0.offset))))) (or (not (bvsle (bvadd c_~counter~0 .cse1) (bvadd .cse6 (_ bv2147483647 32)))) (= (bvadd c_~counter~0 .cse1 (bvneg .cse6)) (_ bv0 32)))))))) is different from false [2023-08-30 06:10:13,282 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 06:10:13,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 996 treesize of output 732 [2023-08-30 06:10:13,305 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 06:10:13,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 356 treesize of output 300 [2023-08-30 06:10:13,329 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 06:10:13,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 247 treesize of output 163 [2023-08-30 06:10:13,715 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 06:10:13,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 628 treesize of output 474 [2023-08-30 06:10:13,730 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 06:10:13,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 288 treesize of output 232 [2023-08-30 06:10:13,746 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 06:10:13,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 123 [2023-08-30 06:10:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-08-30 06:10:14,559 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:10:14,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1948182463] [2023-08-30 06:10:14,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1948182463] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:10:14,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:10:14,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2023-08-30 06:10:14,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770528089] [2023-08-30 06:10:14,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:10:14,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 06:10:14,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:10:14,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 06:10:14,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=223, Unknown=3, NotChecked=96, Total=380 [2023-08-30 06:10:14,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 251 [2023-08-30 06:10:14,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 533 transitions, 8409 flow. Second operand has 20 states, 20 states have (on average 75.9) internal successors, (1518), 20 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:10:14,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:10:14,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 251 [2023-08-30 06:10:14,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand