./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/unroll-5.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/unroll-5.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 c8ce32899aa465c1eaa89b234122d94aaf792bb347295ccb743670e04bba6b8e --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 07:44:13,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:44:13,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:44:13,113 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:44:13,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:44:13,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:44:13,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:44:13,124 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:44:13,125 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:44:13,129 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:44:13,130 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:44:13,132 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:44:13,132 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:44:13,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:44:13,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:44:13,140 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:44:13,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:44:13,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:44:13,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:44:13,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:44:13,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:44:13,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:44:13,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:44:13,151 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:44:13,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:44:13,157 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:44:13,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:44:13,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:44:13,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:44:13,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:44:13,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:44:13,162 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:44:13,163 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:44:13,164 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:44:13,164 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:44:13,164 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:44:13,165 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:44:13,165 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:44:13,165 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:44:13,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:44:13,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:44:13,168 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 07:44:13,197 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:44:13,197 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:44:13,198 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:44:13,198 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:44:13,199 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:44:13,199 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:44:13,200 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:44:13,200 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:44:13,200 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:44:13,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:44:13,201 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:44:13,201 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:44:13,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:44:13,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:44:13,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:44:13,201 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:44:13,202 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:44:13,202 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:44:13,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:44:13,202 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:44:13,202 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:44:13,202 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:44:13,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:44:13,203 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:44:13,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:44:13,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:44:13,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:44:13,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:44:13,203 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 07:44:13,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 07:44:13,204 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:44:13,204 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:44:13,204 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:44:13,204 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:44:13,204 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8ce32899aa465c1eaa89b234122d94aaf792bb347295ccb743670e04bba6b8e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:44:13,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:44:13,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:44:13,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:44:13,461 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:44:13,462 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:44:13,462 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-5.wvr.c [2023-08-30 07:44:14,409 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:44:14,640 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:44:14,641 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-5.wvr.c [2023-08-30 07:44:14,666 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64573de82/bd6c4ccc42574e9aa26294228ec0e24e/FLAG5864fc3a3 [2023-08-30 07:44:14,686 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64573de82/bd6c4ccc42574e9aa26294228ec0e24e [2023-08-30 07:44:14,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:44:14,689 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:44:14,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:44:14,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:44:14,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:44:14,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:44:14" (1/1) ... [2023-08-30 07:44:14,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61ade63c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:44:14, skipping insertion in model container [2023-08-30 07:44:14,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:44:14" (1/1) ... [2023-08-30 07:44:14,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:44:14,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:44:14,840 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/unroll-5.wvr.c[2644,2657] [2023-08-30 07:44:14,852 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:44:14,862 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 07:44:14,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@64091db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:44:14, skipping insertion in model container [2023-08-30 07:44:14,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:44:14,864 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 07:44:14,866 INFO L158 Benchmark]: Toolchain (without parser) took 176.35ms. Allocated memory is still 67.1MB. Free memory was 44.4MB in the beginning and 34.6MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 07:44:14,866 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 52.4MB. Free memory was 29.5MB in the beginning and 29.5MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 07:44:14,867 INFO L158 Benchmark]: CACSL2BoogieTranslator took 173.38ms. Allocated memory is still 67.1MB. Free memory was 44.2MB in the beginning and 34.6MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 07:44:14,868 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 52.4MB. Free memory was 29.5MB in the beginning and 29.5MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 173.38ms. Allocated memory is still 67.1MB. Free memory was 44.2MB in the beginning and 34.6MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 106]: 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/unroll-5.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 c8ce32899aa465c1eaa89b234122d94aaf792bb347295ccb743670e04bba6b8e --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 07:44:16,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:44:16,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:44:16,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:44:16,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:44:16,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:44:16,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:44:16,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:44:16,428 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:44:16,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:44:16,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:44:16,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:44:16,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:44:16,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:44:16,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:44:16,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:44:16,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:44:16,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:44:16,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:44:16,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:44:16,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:44:16,447 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:44:16,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:44:16,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:44:16,454 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:44:16,454 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:44:16,454 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:44:16,455 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:44:16,456 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:44:16,456 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:44:16,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:44:16,460 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:44:16,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:44:16,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:44:16,463 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:44:16,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:44:16,464 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:44:16,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:44:16,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:44:16,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:44:16,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:44:16,466 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 07:44:16,486 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:44:16,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:44:16,487 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:44:16,487 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:44:16,488 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:44:16,488 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:44:16,488 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:44:16,488 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:44:16,488 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:44:16,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:44:16,489 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:44:16,489 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:44:16,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:44:16,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:44:16,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:44:16,490 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:44:16,490 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:44:16,490 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:44:16,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:44:16,490 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:44:16,490 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 07:44:16,490 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 07:44:16,491 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:44:16,491 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:44:16,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:44:16,491 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:44:16,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:44:16,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:44:16,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:44:16,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:44:16,492 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 07:44:16,492 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 07:44:16,492 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:44:16,492 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:44:16,492 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:44:16,493 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 07:44:16,493 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:44:16,493 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8ce32899aa465c1eaa89b234122d94aaf792bb347295ccb743670e04bba6b8e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:44:16,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:44:16,789 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:44:16,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:44:16,792 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:44:16,792 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:44:16,793 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-5.wvr.c [2023-08-30 07:44:17,747 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:44:17,945 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:44:17,946 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-5.wvr.c [2023-08-30 07:44:17,969 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/485dc1a16/adc19e60267441d58d936358491dd3f7/FLAG82bfda9cb [2023-08-30 07:44:18,317 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/485dc1a16/adc19e60267441d58d936358491dd3f7 [2023-08-30 07:44:18,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:44:18,322 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:44:18,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:44:18,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:44:18,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:44:18,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:44:18" (1/1) ... [2023-08-30 07:44:18,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@290b2930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:44:18, skipping insertion in model container [2023-08-30 07:44:18,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:44:18" (1/1) ... [2023-08-30 07:44:18,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:44:18,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:44:18,475 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/unroll-5.wvr.c[2644,2657] [2023-08-30 07:44:18,481 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:44:18,489 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 07:44:18,491 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:44:18,500 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/unroll-5.wvr.c[2644,2657] [2023-08-30 07:44:18,502 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:44:18,506 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 07:44:18,527 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/unroll-5.wvr.c[2644,2657] [2023-08-30 07:44:18,529 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:44:18,541 INFO L208 MainTranslator]: Completed translation [2023-08-30 07:44:18,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:44:18 WrapperNode [2023-08-30 07:44:18,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:44:18,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 07:44:18,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 07:44:18,543 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 07:44:18,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:44:18" (1/1) ... [2023-08-30 07:44:18,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:44:18" (1/1) ... [2023-08-30 07:44:18,579 INFO L138 Inliner]: procedures = 26, calls = 38, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 165 [2023-08-30 07:44:18,579 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 07:44:18,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 07:44:18,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 07:44:18,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 07:44:18,587 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:44:18" (1/1) ... [2023-08-30 07:44:18,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:44:18" (1/1) ... [2023-08-30 07:44:18,589 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:44:18" (1/1) ... [2023-08-30 07:44:18,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:44:18" (1/1) ... [2023-08-30 07:44:18,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:44:18" (1/1) ... [2023-08-30 07:44:18,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:44:18" (1/1) ... [2023-08-30 07:44:18,605 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:44:18" (1/1) ... [2023-08-30 07:44:18,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:44:18" (1/1) ... [2023-08-30 07:44:18,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 07:44:18,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 07:44:18,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 07:44:18,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 07:44:18,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:44:18" (1/1) ... [2023-08-30 07:44:18,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:44:18,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:44:18,627 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 07:44:18,636 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 07:44:18,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 07:44:18,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 07:44:18,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 07:44:18,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 07:44:18,680 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 07:44:18,681 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 07:44:18,681 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 07:44:18,681 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 07:44:18,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 07:44:18,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 07:44:18,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 07:44:18,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 07:44:18,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 07:44:18,682 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 07:44:18,759 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 07:44:18,761 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 07:44:19,154 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 07:44:19,177 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 07:44:19,177 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 07:44:19,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:44:19 BoogieIcfgContainer [2023-08-30 07:44:19,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 07:44:19,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 07:44:19,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 07:44:19,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 07:44:19,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:44:18" (1/3) ... [2023-08-30 07:44:19,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff17e39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:44:19, skipping insertion in model container [2023-08-30 07:44:19,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:44:18" (2/3) ... [2023-08-30 07:44:19,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff17e39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:44:19, skipping insertion in model container [2023-08-30 07:44:19,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:44:19" (3/3) ... [2023-08-30 07:44:19,186 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-5.wvr.c [2023-08-30 07:44:19,198 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 07:44:19,199 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2023-08-30 07:44:19,199 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 07:44:19,346 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 07:44:19,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 220 transitions, 456 flow [2023-08-30 07:44:19,463 INFO L130 PetriNetUnfolder]: 17/218 cut-off events. [2023-08-30 07:44:19,463 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:44:19,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 218 events. 17/218 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 275 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 117. Up to 2 conditions per place. [2023-08-30 07:44:19,471 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 220 transitions, 456 flow [2023-08-30 07:44:19,475 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 214 transitions, 440 flow [2023-08-30 07:44:19,478 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 07:44:19,484 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 204 places, 214 transitions, 440 flow [2023-08-30 07:44:19,486 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 204 places, 214 transitions, 440 flow [2023-08-30 07:44:19,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 214 transitions, 440 flow [2023-08-30 07:44:19,521 INFO L130 PetriNetUnfolder]: 17/214 cut-off events. [2023-08-30 07:44:19,521 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:44:19,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 214 events. 17/214 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 261 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 117. Up to 2 conditions per place. [2023-08-30 07:44:19,525 INFO L119 LiptonReduction]: Number of co-enabled transitions 5568 [2023-08-30 07:44:44,954 INFO L134 LiptonReduction]: Checked pairs total: 5474 [2023-08-30 07:44:44,954 INFO L136 LiptonReduction]: Total number of compositions: 253 [2023-08-30 07:44:44,964 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 07:44:44,969 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;@40f8c91a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 07:44:44,969 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-08-30 07:44:44,971 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 07:44:44,971 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:44:44,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:44:44,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:44:44,972 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 07:44:44,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:44:44,976 INFO L85 PathProgramCache]: Analyzing trace with hash 28433, now seen corresponding path program 1 times [2023-08-30 07:44:44,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:44:44,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333941641] [2023-08-30 07:44:44,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:44:44,984 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 07:44:44,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:44:44,987 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 07:44:44,988 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 07:44:45,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:44:45,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 07:44:45,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:44:45,118 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 07:44:45,119 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 07:44:45,157 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 07:44:45,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:44:45,158 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:44:45,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333941641] [2023-08-30 07:44:45,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333941641] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:44:45,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:44:45,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:44:45,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973766944] [2023-08-30 07:44:45,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:44:45,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:44:45,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:44:45,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:44:45,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:44:45,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 473 [2023-08-30 07:44:45,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:45,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:44:45,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 473 [2023-08-30 07:44:45,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:44:45,651 INFO L130 PetriNetUnfolder]: 597/840 cut-off events. [2023-08-30 07:44:45,651 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 07:44:45,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1700 conditions, 840 events. 597/840 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 3621 event pairs, 286 based on Foata normal form. 0/198 useless extension candidates. Maximal degree in co-relation 1466. Up to 834 conditions per place. [2023-08-30 07:44:45,657 INFO L137 encePairwiseOnDemand]: 466/473 looper letters, 31 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-08-30 07:44:45,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 144 flow [2023-08-30 07:44:45,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:44:45,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:44:45,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 623 transitions. [2023-08-30 07:44:45,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4390415785764623 [2023-08-30 07:44:45,669 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 623 transitions. [2023-08-30 07:44:45,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 623 transitions. [2023-08-30 07:44:45,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:44:45,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 623 transitions. [2023-08-30 07:44:45,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:45,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:45,680 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:45,682 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 92 flow. Second operand 3 states and 623 transitions. [2023-08-30 07:44:45,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 144 flow [2023-08-30 07:44:45,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 136 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 07:44:45,688 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 74 flow [2023-08-30 07:44:45,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2023-08-30 07:44:45,694 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -8 predicate places. [2023-08-30 07:44:45,694 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 74 flow [2023-08-30 07:44:45,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:45,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:44:45,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:44:45,703 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 07:44:45,902 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 07:44:45,903 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 07:44:45,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:44:45,904 INFO L85 PathProgramCache]: Analyzing trace with hash 28551, now seen corresponding path program 1 times [2023-08-30 07:44:45,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:44:45,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [168904393] [2023-08-30 07:44:45,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:44:45,908 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 07:44:45,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:44:45,917 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 07:44:45,927 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 07:44:45,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:44:45,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 07:44:45,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:44:46,018 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 07:44:46,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:44:46,019 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:44:46,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [168904393] [2023-08-30 07:44:46,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [168904393] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:44:46,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:44:46,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:44:46,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805827143] [2023-08-30 07:44:46,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:44:46,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:44:46,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:44:46,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:44:46,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:44:46,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 473 [2023-08-30 07:44:46,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:46,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:44:46,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 473 [2023-08-30 07:44:46,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:44:46,318 INFO L130 PetriNetUnfolder]: 597/842 cut-off events. [2023-08-30 07:44:46,318 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 07:44:46,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1688 conditions, 842 events. 597/842 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 3618 event pairs, 286 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 1682. Up to 835 conditions per place. [2023-08-30 07:44:46,324 INFO L137 encePairwiseOnDemand]: 468/473 looper letters, 32 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-08-30 07:44:46,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 36 transitions, 146 flow [2023-08-30 07:44:46,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:44:46,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:44:46,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 628 transitions. [2023-08-30 07:44:46,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44256518675123324 [2023-08-30 07:44:46,327 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 628 transitions. [2023-08-30 07:44:46,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 628 transitions. [2023-08-30 07:44:46,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:44:46,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 628 transitions. [2023-08-30 07:44:46,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:46,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:46,331 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:46,331 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 74 flow. Second operand 3 states and 628 transitions. [2023-08-30 07:44:46,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 36 transitions, 146 flow [2023-08-30 07:44:46,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 145 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:44:46,333 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 89 flow [2023-08-30 07:44:46,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2023-08-30 07:44:46,334 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -6 predicate places. [2023-08-30 07:44:46,334 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 89 flow [2023-08-30 07:44:46,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:46,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:44:46,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:44:46,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 07:44:46,560 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 07:44:46,560 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 07:44:46,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:44:46,563 INFO L85 PathProgramCache]: Analyzing trace with hash 28434, now seen corresponding path program 1 times [2023-08-30 07:44:46,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:44:46,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372730879] [2023-08-30 07:44:46,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:44:46,564 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 07:44:46,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:44:46,565 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 07:44:46,567 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 07:44:46,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:44:46,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:44:46,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:44:46,648 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:44:46,649 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 07:44:46,669 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 07:44:46,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:44:46,670 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:44:46,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372730879] [2023-08-30 07:44:46,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372730879] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:44:46,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:44:46,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:44:46,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424695060] [2023-08-30 07:44:46,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:44:46,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:44:46,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:44:46,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:44:46,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:44:46,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 473 [2023-08-30 07:44:46,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:46,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:44:46,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 473 [2023-08-30 07:44:46,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:44:47,168 INFO L130 PetriNetUnfolder]: 597/841 cut-off events. [2023-08-30 07:44:47,168 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 07:44:47,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1694 conditions, 841 events. 597/841 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 3611 event pairs, 286 based on Foata normal form. 1/201 useless extension candidates. Maximal degree in co-relation 1686. Up to 835 conditions per place. [2023-08-30 07:44:47,172 INFO L137 encePairwiseOnDemand]: 470/473 looper letters, 31 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-08-30 07:44:47,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 155 flow [2023-08-30 07:44:47,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:44:47,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:44:47,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 622 transitions. [2023-08-30 07:44:47,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383368569415081 [2023-08-30 07:44:47,174 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 622 transitions. [2023-08-30 07:44:47,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 622 transitions. [2023-08-30 07:44:47,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:44:47,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 622 transitions. [2023-08-30 07:44:47,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:47,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:47,178 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:47,178 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 89 flow. Second operand 3 states and 622 transitions. [2023-08-30 07:44:47,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 155 flow [2023-08-30 07:44:47,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 151 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 07:44:47,179 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 93 flow [2023-08-30 07:44:47,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-08-30 07:44:47,180 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2023-08-30 07:44:47,180 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 93 flow [2023-08-30 07:44:47,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:47,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:44:47,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:44:47,195 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 07:44:47,387 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 07:44:47,388 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 07:44:47,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:44:47,388 INFO L85 PathProgramCache]: Analyzing trace with hash 885243, now seen corresponding path program 1 times [2023-08-30 07:44:47,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:44:47,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575170324] [2023-08-30 07:44:47,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:44:47,389 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 07:44:47,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:44:47,394 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 07:44:47,397 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 07:44:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:44:47,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:44:47,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:44:47,514 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:44:47,515 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 07:44:47,555 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 07:44:47,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:44:47,680 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 07:44:47,680 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:44:47,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575170324] [2023-08-30 07:44:47,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575170324] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:44:47,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:44:47,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 07:44:47,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531940109] [2023-08-30 07:44:47,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:44:47,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:44:47,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:44:47,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:44:47,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:44:48,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 473 [2023-08-30 07:44:48,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 93 flow. Second operand has 6 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:48,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:44:48,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 473 [2023-08-30 07:44:48,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:44:49,164 INFO L130 PetriNetUnfolder]: 1199/1687 cut-off events. [2023-08-30 07:44:49,165 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:44:49,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3401 conditions, 1687 events. 1199/1687 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 8220 event pairs, 572 based on Foata normal form. 3/402 useless extension candidates. Maximal degree in co-relation 3391. Up to 838 conditions per place. [2023-08-30 07:44:49,171 INFO L137 encePairwiseOnDemand]: 467/473 looper letters, 60 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2023-08-30 07:44:49,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 73 transitions, 339 flow [2023-08-30 07:44:49,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:44:49,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:44:49,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1214 transitions. [2023-08-30 07:44:49,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4277660324171952 [2023-08-30 07:44:49,174 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1214 transitions. [2023-08-30 07:44:49,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1214 transitions. [2023-08-30 07:44:49,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:44:49,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1214 transitions. [2023-08-30 07:44:49,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.33333333333334) internal successors, (1214), 6 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:49,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:49,181 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:49,181 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 93 flow. Second operand 6 states and 1214 transitions. [2023-08-30 07:44:49,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 73 transitions, 339 flow [2023-08-30 07:44:49,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 73 transitions, 335 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:44:49,184 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 187 flow [2023-08-30 07:44:49,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=187, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2023-08-30 07:44:49,189 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-30 07:44:49,189 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 187 flow [2023-08-30 07:44:49,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:49,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:44:49,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:44:49,199 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 07:44:49,397 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 07:44:49,397 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 07:44:49,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:44:49,397 INFO L85 PathProgramCache]: Analyzing trace with hash 885360, now seen corresponding path program 1 times [2023-08-30 07:44:49,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:44:49,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123589478] [2023-08-30 07:44:49,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:44:49,398 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 07:44:49,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:44:49,399 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 07:44:49,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 07:44:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:44:49,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 07:44:49,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:44:49,479 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2023-08-30 07:44:49,483 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 07:44:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:44:49,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:44:49,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:44:49,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123589478] [2023-08-30 07:44:49,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123589478] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:44:49,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:44:49,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:44:49,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919827648] [2023-08-30 07:44:49,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:44:49,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:44:49,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:44:49,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:44:49,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:44:49,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 473 [2023-08-30 07:44:49,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:49,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:44:49,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 473 [2023-08-30 07:44:49,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:44:49,866 INFO L130 PetriNetUnfolder]: 903/1299 cut-off events. [2023-08-30 07:44:49,866 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 07:44:49,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2651 conditions, 1299 events. 903/1299 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 6297 event pairs, 430 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 2637. Up to 1287 conditions per place. [2023-08-30 07:44:49,871 INFO L137 encePairwiseOnDemand]: 470/473 looper letters, 37 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-30 07:44:49,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 40 transitions, 237 flow [2023-08-30 07:44:49,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:44:49,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:44:49,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 608 transitions. [2023-08-30 07:44:49,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4284707540521494 [2023-08-30 07:44:49,873 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 608 transitions. [2023-08-30 07:44:49,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 608 transitions. [2023-08-30 07:44:49,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:44:49,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 608 transitions. [2023-08-30 07:44:49,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:49,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:49,877 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:49,877 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 187 flow. Second operand 3 states and 608 transitions. [2023-08-30 07:44:49,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 40 transitions, 237 flow [2023-08-30 07:44:49,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 40 transitions, 221 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-30 07:44:49,880 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 147 flow [2023-08-30 07:44:49,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2023-08-30 07:44:49,882 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-08-30 07:44:49,882 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 147 flow [2023-08-30 07:44:49,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:49,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:44:49,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:44:49,892 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 07:44:50,089 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 07:44:50,089 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 07:44:50,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:44:50,091 INFO L85 PathProgramCache]: Analyzing trace with hash 885361, now seen corresponding path program 1 times [2023-08-30 07:44:50,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:44:50,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348010809] [2023-08-30 07:44:50,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:44:50,091 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 07:44:50,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:44:50,093 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 07:44:50,095 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 07:44:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:44:50,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:44:50,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:44:50,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:44:50,200 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2023-08-30 07:44:50,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 26 [2023-08-30 07:44:50,208 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 07:44:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:44:50,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:44:50,272 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:44:50,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348010809] [2023-08-30 07:44:50,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348010809] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:44:50,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:44:50,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:44:50,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132086688] [2023-08-30 07:44:50,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:44:50,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:44:50,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:44:50,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:44:50,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:44:50,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 473 [2023-08-30 07:44:50,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:50,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:44:50,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 473 [2023-08-30 07:44:50,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:44:50,669 INFO L130 PetriNetUnfolder]: 607/911 cut-off events. [2023-08-30 07:44:50,670 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-30 07:44:50,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1859 conditions, 911 events. 607/911 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 4345 event pairs, 288 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 1844. Up to 899 conditions per place. [2023-08-30 07:44:50,683 INFO L137 encePairwiseOnDemand]: 470/473 looper letters, 33 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-08-30 07:44:50,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 36 transitions, 193 flow [2023-08-30 07:44:50,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:44:50,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:44:50,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 615 transitions. [2023-08-30 07:44:50,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4334038054968288 [2023-08-30 07:44:50,688 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 615 transitions. [2023-08-30 07:44:50,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 615 transitions. [2023-08-30 07:44:50,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:44:50,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 615 transitions. [2023-08-30 07:44:50,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:50,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:50,692 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:50,692 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 147 flow. Second operand 3 states and 615 transitions. [2023-08-30 07:44:50,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 36 transitions, 193 flow [2023-08-30 07:44:50,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 36 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:44:50,695 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 126 flow [2023-08-30 07:44:50,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2023-08-30 07:44:50,698 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-08-30 07:44:50,698 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 126 flow [2023-08-30 07:44:50,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:50,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:44:50,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:44:50,715 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 07:44:50,905 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 07:44:50,905 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 07:44:50,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:44:50,906 INFO L85 PathProgramCache]: Analyzing trace with hash 850849787, now seen corresponding path program 1 times [2023-08-30 07:44:50,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:44:50,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841814433] [2023-08-30 07:44:50,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:44:50,906 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 07:44:50,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:44:50,908 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 07:44:50,909 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 07:44:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:44:50,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 07:44:50,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:44:51,012 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 07:44:51,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2023-08-30 07:44:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:44:51,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:44:51,027 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:44:51,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841814433] [2023-08-30 07:44:51,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841814433] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:44:51,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:44:51,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:44:51,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987598612] [2023-08-30 07:44:51,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:44:51,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:44:51,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:44:51,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:44:51,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:44:51,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 473 [2023-08-30 07:44:51,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:51,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:44:51,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 473 [2023-08-30 07:44:51,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:44:51,370 INFO L130 PetriNetUnfolder]: 561/837 cut-off events. [2023-08-30 07:44:51,370 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-30 07:44:51,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1712 conditions, 837 events. 561/837 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 3902 event pairs, 266 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 1696. Up to 825 conditions per place. [2023-08-30 07:44:51,373 INFO L137 encePairwiseOnDemand]: 470/473 looper letters, 31 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-08-30 07:44:51,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 34 transitions, 186 flow [2023-08-30 07:44:51,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:44:51,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:44:51,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 604 transitions. [2023-08-30 07:44:51,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42565186751233264 [2023-08-30 07:44:51,376 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 604 transitions. [2023-08-30 07:44:51,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 604 transitions. [2023-08-30 07:44:51,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:44:51,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 604 transitions. [2023-08-30 07:44:51,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:51,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:51,379 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:51,379 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 126 flow. Second operand 3 states and 604 transitions. [2023-08-30 07:44:51,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 34 transitions, 186 flow [2023-08-30 07:44:51,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 34 transitions, 185 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:44:51,381 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 123 flow [2023-08-30 07:44:51,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2023-08-30 07:44:51,382 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2023-08-30 07:44:51,382 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 123 flow [2023-08-30 07:44:51,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:51,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:44:51,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:44:51,405 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 07:44:51,589 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 07:44:51,589 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 07:44:51,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:44:51,590 INFO L85 PathProgramCache]: Analyzing trace with hash 850849788, now seen corresponding path program 1 times [2023-08-30 07:44:51,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:44:51,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484169156] [2023-08-30 07:44:51,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:44:51,590 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 07:44:51,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:44:51,591 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 07:44:51,593 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 07:44:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:44:51,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 07:44:51,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:44:51,706 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:44:51,706 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 07:44:51,838 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 07:44:51,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:44:51,989 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 07:44:51,990 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:44:51,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484169156] [2023-08-30 07:44:51,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484169156] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:44:51,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:44:51,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 07:44:51,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715285234] [2023-08-30 07:44:51,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:44:51,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:44:51,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:44:51,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:44:51,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:44:52,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 473 [2023-08-30 07:44:52,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 123 flow. Second operand has 8 states, 8 states have (on average 187.25) internal successors, (1498), 8 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:52,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:44:52,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 473 [2023-08-30 07:44:52,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:44:53,352 INFO L130 PetriNetUnfolder]: 515/763 cut-off events. [2023-08-30 07:44:53,352 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-30 07:44:53,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1565 conditions, 763 events. 515/763 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 3442 event pairs, 244 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 1548. Up to 378 conditions per place. [2023-08-30 07:44:53,355 INFO L137 encePairwiseOnDemand]: 469/473 looper letters, 48 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-08-30 07:44:53,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 273 flow [2023-08-30 07:44:53,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:44:53,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:44:53,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 981 transitions. [2023-08-30 07:44:53,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147991543340381 [2023-08-30 07:44:53,357 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 981 transitions. [2023-08-30 07:44:53,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 981 transitions. [2023-08-30 07:44:53,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:44:53,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 981 transitions. [2023-08-30 07:44:53,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 196.2) internal successors, (981), 5 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:53,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 473.0) internal successors, (2838), 6 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:53,362 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 473.0) internal successors, (2838), 6 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:53,362 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 123 flow. Second operand 5 states and 981 transitions. [2023-08-30 07:44:53,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 273 flow [2023-08-30 07:44:53,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:44:53,365 INFO L231 Difference]: Finished difference. Result has 45 places, 32 transitions, 124 flow [2023-08-30 07:44:53,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=45, PETRI_TRANSITIONS=32} [2023-08-30 07:44:53,366 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-08-30 07:44:53,366 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 32 transitions, 124 flow [2023-08-30 07:44:53,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 187.25) internal successors, (1498), 8 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:53,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:44:53,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 07:44:53,377 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 07:44:53,577 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 07:44:53,578 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 07:44:53,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:44:53,578 INFO L85 PathProgramCache]: Analyzing trace with hash 606531938, now seen corresponding path program 1 times [2023-08-30 07:44:53,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:44:53,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104081617] [2023-08-30 07:44:53,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:44:53,579 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 07:44:53,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:44:53,580 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 07:44:53,582 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 07:44:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:44:53,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:44:53,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:44:53,678 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 07:44:53,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:44:53,772 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 35 treesize of output 31 [2023-08-30 07:44:53,829 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 07:44:53,829 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:44:53,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104081617] [2023-08-30 07:44:53,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104081617] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:44:53,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:44:53,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 07:44:53,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486399436] [2023-08-30 07:44:53,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:44:53,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:44:53,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:44:53,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:44:53,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:44:54,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 473 [2023-08-30 07:44:54,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 32 transitions, 124 flow. Second operand has 8 states, 8 states have (on average 188.25) internal successors, (1506), 8 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 07:44:54,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:44:54,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 473 [2023-08-30 07:44:54,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:44:55,924 INFO L130 PetriNetUnfolder]: 681/1051 cut-off events. [2023-08-30 07:44:55,925 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-30 07:44:55,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2152 conditions, 1051 events. 681/1051 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 5388 event pairs, 213 based on Foata normal form. 0/393 useless extension candidates. Maximal degree in co-relation 2134. Up to 647 conditions per place. [2023-08-30 07:44:55,928 INFO L137 encePairwiseOnDemand]: 468/473 looper letters, 59 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2023-08-30 07:44:55,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 70 transitions, 349 flow [2023-08-30 07:44:55,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 07:44:55,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 07:44:55,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1375 transitions. [2023-08-30 07:44:55,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2023-08-30 07:44:55,931 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1375 transitions. [2023-08-30 07:44:55,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1375 transitions. [2023-08-30 07:44:55,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:44:55,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1375 transitions. [2023-08-30 07:44:55,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 196.42857142857142) internal successors, (1375), 7 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:55,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 473.0) internal successors, (3784), 8 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:55,938 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 473.0) internal successors, (3784), 8 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:55,938 INFO L175 Difference]: Start difference. First operand has 45 places, 32 transitions, 124 flow. Second operand 7 states and 1375 transitions. [2023-08-30 07:44:55,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 70 transitions, 349 flow [2023-08-30 07:44:55,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 70 transitions, 344 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 07:44:55,939 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 161 flow [2023-08-30 07:44:55,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=161, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2023-08-30 07:44:55,940 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2023-08-30 07:44:55,940 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 161 flow [2023-08-30 07:44:55,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 188.25) internal successors, (1506), 8 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 07:44:55,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:44:55,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 07:44:55,948 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 07:44:56,147 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 07:44:56,148 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 07:44:56,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:44:56,148 INFO L85 PathProgramCache]: Analyzing trace with hash 606531937, now seen corresponding path program 1 times [2023-08-30 07:44:56,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:44:56,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1296389765] [2023-08-30 07:44:56,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:44:56,149 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 07:44:56,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:44:56,150 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 07:44:56,152 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 07:44:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:44:56,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 07:44:56,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:44:56,242 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 07:44:56,242 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 07:44:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:44:56,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:44:56,259 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:44:56,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1296389765] [2023-08-30 07:44:56,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1296389765] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:44:56,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:44:56,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:44:56,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246548442] [2023-08-30 07:44:56,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:44:56,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:44:56,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:44:56,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:44:56,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:44:56,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 473 [2023-08-30 07:44:56,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 35 transitions, 161 flow. Second operand has 4 states, 4 states have (on average 182.25) internal successors, (729), 4 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:56,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:44:56,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 473 [2023-08-30 07:44:56,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:44:56,633 INFO L130 PetriNetUnfolder]: 431/693 cut-off events. [2023-08-30 07:44:56,634 INFO L131 PetriNetUnfolder]: For 189/189 co-relation queries the response was YES. [2023-08-30 07:44:56,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1607 conditions, 693 events. 431/693 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 3469 event pairs, 246 based on Foata normal form. 0/403 useless extension candidates. Maximal degree in co-relation 1587. Up to 676 conditions per place. [2023-08-30 07:44:56,636 INFO L137 encePairwiseOnDemand]: 469/473 looper letters, 26 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2023-08-30 07:44:56,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 33 transitions, 219 flow [2023-08-30 07:44:56,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:44:56,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:44:56,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 748 transitions. [2023-08-30 07:44:56,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2023-08-30 07:44:56,638 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 748 transitions. [2023-08-30 07:44:56,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 748 transitions. [2023-08-30 07:44:56,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:44:56,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 748 transitions. [2023-08-30 07:44:56,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:56,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:56,642 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:56,642 INFO L175 Difference]: Start difference. First operand has 50 places, 35 transitions, 161 flow. Second operand 4 states and 748 transitions. [2023-08-30 07:44:56,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 33 transitions, 219 flow [2023-08-30 07:44:56,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 33 transitions, 205 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 07:44:56,643 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 153 flow [2023-08-30 07:44:56,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=153, PETRI_PLACES=49, PETRI_TRANSITIONS=33} [2023-08-30 07:44:56,645 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2023-08-30 07:44:56,645 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 153 flow [2023-08-30 07:44:56,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 182.25) internal successors, (729), 4 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:44:56,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:44:56,645 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 07:44:56,654 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 07:44:56,852 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 07:44:56,852 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 07:44:56,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:44:56,852 INFO L85 PathProgramCache]: Analyzing trace with hash 606232914, now seen corresponding path program 2 times [2023-08-30 07:44:56,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:44:56,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832247877] [2023-08-30 07:44:56,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:44:56,853 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 07:44:56,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:44:56,854 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 07:44:56,856 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 07:44:56,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:44:56,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:44:56,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 07:44:56,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:44:56,961 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:44:56,961 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 07:44:57,052 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 07:44:57,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:44:57,461 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 07:44:57,462 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:44:57,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832247877] [2023-08-30 07:44:57,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832247877] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:44:57,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:44:57,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 07:44:57,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950724861] [2023-08-30 07:44:57,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:44:57,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:44:57,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:44:57,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:44:57,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:45:01,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 473 [2023-08-30 07:45:01,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 33 transitions, 153 flow. Second operand has 12 states, 12 states have (on average 192.0) internal successors, (2304), 12 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:01,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:45:01,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 473 [2023-08-30 07:45:01,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:45:05,219 INFO L130 PetriNetUnfolder]: 1928/3092 cut-off events. [2023-08-30 07:45:05,219 INFO L131 PetriNetUnfolder]: For 859/859 co-relation queries the response was YES. [2023-08-30 07:45:05,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7036 conditions, 3092 events. 1928/3092 cut-off events. For 859/859 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 18848 event pairs, 1107 based on Foata normal form. 6/1801 useless extension candidates. Maximal degree in co-relation 7015. Up to 339 conditions per place. [2023-08-30 07:45:05,233 INFO L137 encePairwiseOnDemand]: 469/473 looper letters, 182 selfloop transitions, 12 changer transitions 0/196 dead transitions. [2023-08-30 07:45:05,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 196 transitions, 1034 flow [2023-08-30 07:45:05,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 07:45:05,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 07:45:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2483 transitions. [2023-08-30 07:45:05,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43745595489781536 [2023-08-30 07:45:05,260 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2483 transitions. [2023-08-30 07:45:05,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2483 transitions. [2023-08-30 07:45:05,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:45:05,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2483 transitions. [2023-08-30 07:45:05,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 206.91666666666666) internal successors, (2483), 12 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:05,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 473.0) internal successors, (6149), 13 states have internal predecessors, (6149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:05,278 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 473.0) internal successors, (6149), 13 states have internal predecessors, (6149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:05,278 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 153 flow. Second operand 12 states and 2483 transitions. [2023-08-30 07:45:05,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 196 transitions, 1034 flow [2023-08-30 07:45:05,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 196 transitions, 1022 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:45:05,282 INFO L231 Difference]: Finished difference. Result has 65 places, 40 transitions, 237 flow [2023-08-30 07:45:05,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=237, PETRI_PLACES=65, PETRI_TRANSITIONS=40} [2023-08-30 07:45:05,283 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2023-08-30 07:45:05,283 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 40 transitions, 237 flow [2023-08-30 07:45:05,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 192.0) internal successors, (2304), 12 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:05,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:45:05,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:45:05,303 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 07:45:05,496 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 07:45:05,496 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 07:45:05,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:45:05,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1622621674, now seen corresponding path program 1 times [2023-08-30 07:45:05,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:45:05,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127551391] [2023-08-30 07:45:05,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:45:05,497 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 07:45:05,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:45:05,502 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 07:45:05,504 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 07:45:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:45:05,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 07:45:05,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:45:05,625 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:45:05,625 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 07:45:05,716 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 07:45:05,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:45:06,192 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 07:45:06,192 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:45:06,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127551391] [2023-08-30 07:45:06,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127551391] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:45:06,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:45:06,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 07:45:06,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269832810] [2023-08-30 07:45:06,193 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:45:06,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:45:06,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:45:06,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:45:06,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:45:13,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 473 [2023-08-30 07:45:13,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 40 transitions, 237 flow. Second operand has 8 states, 8 states have (on average 187.5) internal successors, (1500), 8 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:13,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:45:13,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 473 [2023-08-30 07:45:13,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:45:17,117 INFO L130 PetriNetUnfolder]: 1457/2387 cut-off events. [2023-08-30 07:45:17,117 INFO L131 PetriNetUnfolder]: For 693/693 co-relation queries the response was YES. [2023-08-30 07:45:17,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5469 conditions, 2387 events. 1457/2387 cut-off events. For 693/693 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 14162 event pairs, 828 based on Foata normal form. 21/1484 useless extension candidates. Maximal degree in co-relation 5441. Up to 2023 conditions per place. [2023-08-30 07:45:17,125 INFO L137 encePairwiseOnDemand]: 463/473 looper letters, 52 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2023-08-30 07:45:17,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 65 transitions, 428 flow [2023-08-30 07:45:17,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 07:45:17,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 07:45:17,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1739 transitions. [2023-08-30 07:45:17,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4085036410617806 [2023-08-30 07:45:17,130 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1739 transitions. [2023-08-30 07:45:17,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1739 transitions. [2023-08-30 07:45:17,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:45:17,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1739 transitions. [2023-08-30 07:45:17,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 193.22222222222223) internal successors, (1739), 9 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:17,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:17,137 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:17,137 INFO L175 Difference]: Start difference. First operand has 65 places, 40 transitions, 237 flow. Second operand 9 states and 1739 transitions. [2023-08-30 07:45:17,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 65 transitions, 428 flow [2023-08-30 07:45:17,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 65 transitions, 415 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-30 07:45:17,139 INFO L231 Difference]: Finished difference. Result has 71 places, 40 transitions, 273 flow [2023-08-30 07:45:17,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=273, PETRI_PLACES=71, PETRI_TRANSITIONS=40} [2023-08-30 07:45:17,140 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2023-08-30 07:45:17,140 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 40 transitions, 273 flow [2023-08-30 07:45:17,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 187.5) internal successors, (1500), 8 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:17,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:45:17,140 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 07:45:17,149 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 (13)] Ended with exit code 0 [2023-08-30 07:45:17,349 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 07:45:17,350 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 07:45:17,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:45:17,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1508992575, now seen corresponding path program 2 times [2023-08-30 07:45:17,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:45:17,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219110866] [2023-08-30 07:45:17,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:45:17,350 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 07:45:17,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:45:17,351 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 07:45:17,353 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 07:45:17,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 07:45:17,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:45:17,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 07:45:17,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:45:17,471 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:45:17,471 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 07:45:17,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 07:45:17,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:45:17,545 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:45:17,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219110866] [2023-08-30 07:45:17,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219110866] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:45:17,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:45:17,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:45:17,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796706373] [2023-08-30 07:45:17,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:45:17,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:45:17,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:45:17,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:45:17,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:45:17,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 473 [2023-08-30 07:45:17,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 40 transitions, 273 flow. Second operand has 4 states, 4 states have (on average 193.5) internal successors, (774), 4 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:17,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:45:17,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 473 [2023-08-30 07:45:17,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:45:17,995 INFO L130 PetriNetUnfolder]: 515/977 cut-off events. [2023-08-30 07:45:17,995 INFO L131 PetriNetUnfolder]: For 962/962 co-relation queries the response was YES. [2023-08-30 07:45:17,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2265 conditions, 977 events. 515/977 cut-off events. For 962/962 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5395 event pairs, 270 based on Foata normal form. 162/959 useless extension candidates. Maximal degree in co-relation 2234. Up to 919 conditions per place. [2023-08-30 07:45:17,998 INFO L137 encePairwiseOnDemand]: 465/473 looper letters, 26 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2023-08-30 07:45:17,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 34 transitions, 297 flow [2023-08-30 07:45:17,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:45:17,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:45:18,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 790 transitions. [2023-08-30 07:45:18,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175475687103594 [2023-08-30 07:45:18,001 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 790 transitions. [2023-08-30 07:45:18,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 790 transitions. [2023-08-30 07:45:18,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:45:18,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 790 transitions. [2023-08-30 07:45:18,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 197.5) internal successors, (790), 4 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:18,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:18,005 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:18,005 INFO L175 Difference]: Start difference. First operand has 71 places, 40 transitions, 273 flow. Second operand 4 states and 790 transitions. [2023-08-30 07:45:18,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 34 transitions, 297 flow [2023-08-30 07:45:18,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 34 transitions, 240 flow, removed 9 selfloop flow, removed 14 redundant places. [2023-08-30 07:45:18,006 INFO L231 Difference]: Finished difference. Result has 54 places, 34 transitions, 188 flow [2023-08-30 07:45:18,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=54, PETRI_TRANSITIONS=34} [2023-08-30 07:45:18,007 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2023-08-30 07:45:18,007 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 34 transitions, 188 flow [2023-08-30 07:45:18,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.5) internal successors, (774), 4 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:18,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:45:18,007 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 07:45:18,016 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 (14)] Ended with exit code 0 [2023-08-30 07:45:18,216 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 07:45:18,216 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 07:45:18,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:45:18,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1241804978, now seen corresponding path program 3 times [2023-08-30 07:45:18,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:45:18,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [984810073] [2023-08-30 07:45:18,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:45:18,217 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 07:45:18,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:45:18,218 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 07:45:18,220 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 07:45:18,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 07:45:18,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:45:18,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 07:45:18,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:45:18,385 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:45:18,385 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 07:45:18,650 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 07:45:18,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:45:20,551 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 07:45:20,551 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:45:20,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [984810073] [2023-08-30 07:45:20,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [984810073] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:45:20,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:45:20,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 07:45:20,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975483705] [2023-08-30 07:45:20,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:45:20,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 07:45:20,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:45:20,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 07:45:20,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 07:45:37,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 473 [2023-08-30 07:45:37,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 34 transitions, 188 flow. Second operand has 24 states, 24 states have (on average 192.0) internal successors, (4608), 24 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:37,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:45:37,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 473 [2023-08-30 07:45:37,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:45:53,609 INFO L130 PetriNetUnfolder]: 1199/2273 cut-off events. [2023-08-30 07:45:53,609 INFO L131 PetriNetUnfolder]: For 747/747 co-relation queries the response was YES. [2023-08-30 07:45:53,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5021 conditions, 2273 events. 1199/2273 cut-off events. For 747/747 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 13399 event pairs, 630 based on Foata normal form. 12/1865 useless extension candidates. Maximal degree in co-relation 4999. Up to 504 conditions per place. [2023-08-30 07:45:53,618 INFO L137 encePairwiseOnDemand]: 469/473 looper letters, 296 selfloop transitions, 24 changer transitions 0/322 dead transitions. [2023-08-30 07:45:53,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 322 transitions, 1780 flow [2023-08-30 07:45:53,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 07:45:53,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 07:45:53,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4895 transitions. [2023-08-30 07:45:53,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312015503875969 [2023-08-30 07:45:53,647 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4895 transitions. [2023-08-30 07:45:53,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4895 transitions. [2023-08-30 07:45:53,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:45:53,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4895 transitions. [2023-08-30 07:45:53,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 203.95833333333334) internal successors, (4895), 24 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:53,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 473.0) internal successors, (11825), 25 states have internal predecessors, (11825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:53,666 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 473.0) internal successors, (11825), 25 states have internal predecessors, (11825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:53,666 INFO L175 Difference]: Start difference. First operand has 54 places, 34 transitions, 188 flow. Second operand 24 states and 4895 transitions. [2023-08-30 07:45:53,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 322 transitions, 1780 flow [2023-08-30 07:45:53,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 322 transitions, 1756 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:45:53,671 INFO L231 Difference]: Finished difference. Result has 88 places, 47 transitions, 346 flow [2023-08-30 07:45:53,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=346, PETRI_PLACES=88, PETRI_TRANSITIONS=47} [2023-08-30 07:45:53,671 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2023-08-30 07:45:53,671 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 47 transitions, 346 flow [2023-08-30 07:45:53,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 192.0) internal successors, (4608), 24 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:53,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:45:53,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:45:53,693 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 07:45:53,880 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 07:45:53,881 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 07:45:53,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:45:53,881 INFO L85 PathProgramCache]: Analyzing trace with hash -902556325, now seen corresponding path program 1 times [2023-08-30 07:45:53,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:45:53,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502312797] [2023-08-30 07:45:53,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:45:53,882 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 07:45:53,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:45:53,896 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 07:45:53,897 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 07:45:53,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:45:53,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 07:45:53,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:45:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:45:54,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:45:54,002 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:45:54,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502312797] [2023-08-30 07:45:54,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502312797] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:45:54,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:45:54,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:45:54,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909520188] [2023-08-30 07:45:54,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:45:54,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:45:54,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:45:54,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:45:54,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:45:54,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 473 [2023-08-30 07:45:54,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 47 transitions, 346 flow. Second operand has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:54,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:45:54,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 473 [2023-08-30 07:45:54,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:45:54,415 INFO L130 PetriNetUnfolder]: 1493/2756 cut-off events. [2023-08-30 07:45:54,415 INFO L131 PetriNetUnfolder]: For 608/608 co-relation queries the response was YES. [2023-08-30 07:45:54,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6187 conditions, 2756 events. 1493/2756 cut-off events. For 608/608 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 16670 event pairs, 273 based on Foata normal form. 21/2273 useless extension candidates. Maximal degree in co-relation 6152. Up to 2101 conditions per place. [2023-08-30 07:45:54,430 INFO L137 encePairwiseOnDemand]: 469/473 looper letters, 51 selfloop transitions, 4 changer transitions 1/58 dead transitions. [2023-08-30 07:45:54,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 58 transitions, 487 flow [2023-08-30 07:45:54,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:45:54,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:45:54,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2023-08-30 07:45:54,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312896405919662 [2023-08-30 07:45:54,434 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2023-08-30 07:45:54,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2023-08-30 07:45:54,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:45:54,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2023-08-30 07:45:54,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:54,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:54,437 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:54,437 INFO L175 Difference]: Start difference. First operand has 88 places, 47 transitions, 346 flow. Second operand 3 states and 612 transitions. [2023-08-30 07:45:54,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 58 transitions, 487 flow [2023-08-30 07:45:54,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 58 transitions, 463 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-08-30 07:45:54,441 INFO L231 Difference]: Finished difference. Result has 81 places, 50 transitions, 352 flow [2023-08-30 07:45:54,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=352, PETRI_PLACES=81, PETRI_TRANSITIONS=50} [2023-08-30 07:45:54,442 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2023-08-30 07:45:54,442 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 50 transitions, 352 flow [2023-08-30 07:45:54,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:54,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:45:54,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:45:54,465 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 07:45:54,649 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 07:45:54,650 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 07:45:54,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:45:54,650 INFO L85 PathProgramCache]: Analyzing trace with hash -2011352495, now seen corresponding path program 1 times [2023-08-30 07:45:54,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:45:54,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398902593] [2023-08-30 07:45:54,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:45:54,651 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 07:45:54,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:45:54,652 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 07:45:54,654 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 (17)] Waiting until timeout for monitored process [2023-08-30 07:45:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:45:54,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 07:45:54,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:45:54,813 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 07:45:54,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:45:54,813 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:45:54,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398902593] [2023-08-30 07:45:54,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398902593] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:45:54,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:45:54,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 07:45:54,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636931325] [2023-08-30 07:45:54,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:45:54,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:45:54,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:45:54,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:45:54,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:45:54,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 473 [2023-08-30 07:45:54,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 50 transitions, 352 flow. Second operand has 6 states, 6 states have (on average 190.66666666666666) internal successors, (1144), 6 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:54,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:45:54,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 473 [2023-08-30 07:45:54,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:45:55,345 INFO L130 PetriNetUnfolder]: 1683/3367 cut-off events. [2023-08-30 07:45:55,345 INFO L131 PetriNetUnfolder]: For 1073/1073 co-relation queries the response was YES. [2023-08-30 07:45:55,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8288 conditions, 3367 events. 1683/3367 cut-off events. For 1073/1073 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 21439 event pairs, 520 based on Foata normal form. 240/3607 useless extension candidates. Maximal degree in co-relation 8251. Up to 1662 conditions per place. [2023-08-30 07:45:55,356 INFO L137 encePairwiseOnDemand]: 467/473 looper letters, 52 selfloop transitions, 12 changer transitions 8/72 dead transitions. [2023-08-30 07:45:55,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 72 transitions, 553 flow [2023-08-30 07:45:55,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:45:55,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:45:55,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1170 transitions. [2023-08-30 07:45:55,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41226215644820297 [2023-08-30 07:45:55,359 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1170 transitions. [2023-08-30 07:45:55,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1170 transitions. [2023-08-30 07:45:55,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:45:55,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1170 transitions. [2023-08-30 07:45:55,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 195.0) internal successors, (1170), 6 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:55,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:55,363 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:55,363 INFO L175 Difference]: Start difference. First operand has 81 places, 50 transitions, 352 flow. Second operand 6 states and 1170 transitions. [2023-08-30 07:45:55,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 72 transitions, 553 flow [2023-08-30 07:45:55,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 72 transitions, 548 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:45:55,367 INFO L231 Difference]: Finished difference. Result has 88 places, 51 transitions, 391 flow [2023-08-30 07:45:55,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=88, PETRI_TRANSITIONS=51} [2023-08-30 07:45:55,368 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2023-08-30 07:45:55,368 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 51 transitions, 391 flow [2023-08-30 07:45:55,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 190.66666666666666) internal successors, (1144), 6 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:55,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:45:55,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:45:55,379 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 07:45:55,576 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 07:45:55,576 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 07:45:55,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:45:55,577 INFO L85 PathProgramCache]: Analyzing trace with hash 662331537, now seen corresponding path program 2 times [2023-08-30 07:45:55,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:45:55,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637384582] [2023-08-30 07:45:55,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:45:55,577 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 07:45:55,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:45:55,593 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 07:45:55,595 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 07:45:55,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:45:55,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:45:55,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:45:55,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:45:55,795 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 07:45:55,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:45:55,821 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 07:45:55,822 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:45:55,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637384582] [2023-08-30 07:45:55,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637384582] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 07:45:55,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 07:45:55,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-08-30 07:45:55,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990108730] [2023-08-30 07:45:55,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:45:55,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:45:55,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:45:55,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:45:55,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-08-30 07:45:55,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 473 [2023-08-30 07:45:55,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 51 transitions, 391 flow. Second operand has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:55,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:45:55,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 473 [2023-08-30 07:45:55,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:45:56,454 INFO L130 PetriNetUnfolder]: 1683/3227 cut-off events. [2023-08-30 07:45:56,455 INFO L131 PetriNetUnfolder]: For 3619/3783 co-relation queries the response was YES. [2023-08-30 07:45:56,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9953 conditions, 3227 events. 1683/3227 cut-off events. For 3619/3783 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 19785 event pairs, 480 based on Foata normal form. 83/3290 useless extension candidates. Maximal degree in co-relation 9913. Up to 2080 conditions per place. [2023-08-30 07:45:56,468 INFO L137 encePairwiseOnDemand]: 469/473 looper letters, 54 selfloop transitions, 6 changer transitions 4/65 dead transitions. [2023-08-30 07:45:56,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 65 transitions, 575 flow [2023-08-30 07:45:56,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:45:56,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:45:56,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 809 transitions. [2023-08-30 07:45:56,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4275898520084567 [2023-08-30 07:45:56,471 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 809 transitions. [2023-08-30 07:45:56,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 809 transitions. [2023-08-30 07:45:56,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:45:56,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 809 transitions. [2023-08-30 07:45:56,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:56,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:56,474 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:56,474 INFO L175 Difference]: Start difference. First operand has 88 places, 51 transitions, 391 flow. Second operand 4 states and 809 transitions. [2023-08-30 07:45:56,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 65 transitions, 575 flow [2023-08-30 07:45:56,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 65 transitions, 541 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-30 07:45:56,479 INFO L231 Difference]: Finished difference. Result has 89 places, 54 transitions, 409 flow [2023-08-30 07:45:56,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=409, PETRI_PLACES=89, PETRI_TRANSITIONS=54} [2023-08-30 07:45:56,480 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 45 predicate places. [2023-08-30 07:45:56,480 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 54 transitions, 409 flow [2023-08-30 07:45:56,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:56,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:45:56,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:45:56,501 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 07:45:56,688 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 07:45:56,688 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 07:45:56,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:45:56,688 INFO L85 PathProgramCache]: Analyzing trace with hash 570017975, now seen corresponding path program 1 times [2023-08-30 07:45:56,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:45:56,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [584468300] [2023-08-30 07:45:56,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:45:56,689 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 07:45:56,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:45:56,690 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 07:45:56,692 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 07:45:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:45:56,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 07:45:56,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:45:56,832 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 07:45:56,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:45:56,833 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:45:56,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [584468300] [2023-08-30 07:45:56,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [584468300] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:45:56,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:45:56,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 07:45:56,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773054558] [2023-08-30 07:45:56,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:45:56,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:45:56,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:45:56,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:45:56,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:45:56,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 473 [2023-08-30 07:45:56,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 54 transitions, 409 flow. Second operand has 6 states, 6 states have (on average 189.66666666666666) internal successors, (1138), 6 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:56,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:45:56,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 473 [2023-08-30 07:45:56,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:45:57,784 INFO L130 PetriNetUnfolder]: 1883/3727 cut-off events. [2023-08-30 07:45:57,784 INFO L131 PetriNetUnfolder]: For 5153/5153 co-relation queries the response was YES. [2023-08-30 07:45:57,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11892 conditions, 3727 events. 1883/3727 cut-off events. For 5153/5153 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 23469 event pairs, 520 based on Foata normal form. 40/3767 useless extension candidates. Maximal degree in co-relation 11851. Up to 1782 conditions per place. [2023-08-30 07:45:57,832 INFO L137 encePairwiseOnDemand]: 466/473 looper letters, 52 selfloop transitions, 19 changer transitions 10/81 dead transitions. [2023-08-30 07:45:57,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 81 transitions, 679 flow [2023-08-30 07:45:57,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 07:45:57,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 07:45:57,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1355 transitions. [2023-08-30 07:45:57,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40924192086982786 [2023-08-30 07:45:57,835 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1355 transitions. [2023-08-30 07:45:57,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1355 transitions. [2023-08-30 07:45:57,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:45:57,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1355 transitions. [2023-08-30 07:45:57,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 193.57142857142858) internal successors, (1355), 7 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:57,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 473.0) internal successors, (3784), 8 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:57,842 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 473.0) internal successors, (3784), 8 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:57,842 INFO L175 Difference]: Start difference. First operand has 89 places, 54 transitions, 409 flow. Second operand 7 states and 1355 transitions. [2023-08-30 07:45:57,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 81 transitions, 679 flow [2023-08-30 07:45:57,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 81 transitions, 672 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:45:57,856 INFO L231 Difference]: Finished difference. Result has 96 places, 58 transitions, 493 flow [2023-08-30 07:45:57,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=493, PETRI_PLACES=96, PETRI_TRANSITIONS=58} [2023-08-30 07:45:57,857 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2023-08-30 07:45:57,857 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 58 transitions, 493 flow [2023-08-30 07:45:57,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 189.66666666666666) internal successors, (1138), 6 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:57,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:45:57,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:45:57,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 07:45:58,067 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 07:45:58,068 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 07:45:58,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:45:58,069 INFO L85 PathProgramCache]: Analyzing trace with hash 286698499, now seen corresponding path program 3 times [2023-08-30 07:45:58,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:45:58,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642990003] [2023-08-30 07:45:58,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:45:58,070 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 07:45:58,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:45:58,071 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 07:45:58,104 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 07:45:58,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 07:45:58,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:45:58,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:45:58,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:45:58,308 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 07:45:58,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:45:58,372 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 07:45:58,372 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:45:58,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642990003] [2023-08-30 07:45:58,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642990003] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:45:58,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:45:58,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2023-08-30 07:45:58,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498723242] [2023-08-30 07:45:58,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:45:58,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:45:58,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:45:58,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:45:58,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:45:58,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 473 [2023-08-30 07:45:58,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 58 transitions, 493 flow. Second operand has 10 states, 10 states have (on average 189.6) internal successors, (1896), 10 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:58,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:45:58,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 473 [2023-08-30 07:45:58,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:45:59,851 INFO L130 PetriNetUnfolder]: 3043/5947 cut-off events. [2023-08-30 07:45:59,851 INFO L131 PetriNetUnfolder]: For 12297/12297 co-relation queries the response was YES. [2023-08-30 07:45:59,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22376 conditions, 5947 events. 3043/5947 cut-off events. For 12297/12297 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 40136 event pairs, 360 based on Foata normal form. 480/6427 useless extension candidates. Maximal degree in co-relation 22333. Up to 2302 conditions per place. [2023-08-30 07:45:59,877 INFO L137 encePairwiseOnDemand]: 465/473 looper letters, 79 selfloop transitions, 52 changer transitions 4/135 dead transitions. [2023-08-30 07:45:59,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 135 transitions, 1222 flow [2023-08-30 07:45:59,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 07:45:59,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 07:45:59,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2517 transitions. [2023-08-30 07:45:59,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4093348511953163 [2023-08-30 07:45:59,881 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2517 transitions. [2023-08-30 07:45:59,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2517 transitions. [2023-08-30 07:45:59,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:45:59,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2517 transitions. [2023-08-30 07:45:59,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 193.6153846153846) internal successors, (2517), 13 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:59,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 473.0) internal successors, (6622), 14 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:59,888 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 473.0) internal successors, (6622), 14 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:59,888 INFO L175 Difference]: Start difference. First operand has 96 places, 58 transitions, 493 flow. Second operand 13 states and 2517 transitions. [2023-08-30 07:45:59,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 135 transitions, 1222 flow [2023-08-30 07:45:59,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 135 transitions, 1141 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 07:45:59,909 INFO L231 Difference]: Finished difference. Result has 110 places, 101 transitions, 976 flow [2023-08-30 07:45:59,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=976, PETRI_PLACES=110, PETRI_TRANSITIONS=101} [2023-08-30 07:45:59,909 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2023-08-30 07:45:59,910 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 101 transitions, 976 flow [2023-08-30 07:45:59,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 189.6) internal successors, (1896), 10 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:59,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:45:59,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:45:59,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-08-30 07:46:00,118 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 07:46:00,119 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 07:46:00,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:46:00,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1748527785, now seen corresponding path program 2 times [2023-08-30 07:46:00,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:46:00,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1152344453] [2023-08-30 07:46:00,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:46:00,120 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 07:46:00,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:46:00,121 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 07:46:00,133 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 07:46:00,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:46:00,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:46:00,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:46:00,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:46:00,283 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 07:46:00,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:46:00,315 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 07:46:00,315 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:46:00,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1152344453] [2023-08-30 07:46:00,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1152344453] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 07:46:00,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 07:46:00,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-08-30 07:46:00,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230662936] [2023-08-30 07:46:00,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:46:00,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:46:00,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:46:00,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:46:00,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-30 07:46:00,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 473 [2023-08-30 07:46:00,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 101 transitions, 976 flow. Second operand has 4 states, 4 states have (on average 193.75) internal successors, (775), 4 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:46:00,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:46:00,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 473 [2023-08-30 07:46:00,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:46:01,529 INFO L130 PetriNetUnfolder]: 2943/5767 cut-off events. [2023-08-30 07:46:01,529 INFO L131 PetriNetUnfolder]: For 20568/20708 co-relation queries the response was YES. [2023-08-30 07:46:01,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27222 conditions, 5767 events. 2943/5767 cut-off events. For 20568/20708 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 39111 event pairs, 344 based on Foata normal form. 220/5987 useless extension candidates. Maximal degree in co-relation 27173. Up to 4120 conditions per place. [2023-08-30 07:46:01,555 INFO L137 encePairwiseOnDemand]: 469/473 looper letters, 91 selfloop transitions, 14 changer transitions 4/114 dead transitions. [2023-08-30 07:46:01,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 114 transitions, 1260 flow [2023-08-30 07:46:01,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:46:01,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:46:01,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 795 transitions. [2023-08-30 07:46:01,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4201902748414376 [2023-08-30 07:46:01,559 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 795 transitions. [2023-08-30 07:46:01,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 795 transitions. [2023-08-30 07:46:01,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:46:01,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 795 transitions. [2023-08-30 07:46:01,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 198.75) internal successors, (795), 4 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:46:01,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:46:01,561 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:46:01,561 INFO L175 Difference]: Start difference. First operand has 110 places, 101 transitions, 976 flow. Second operand 4 states and 795 transitions. [2023-08-30 07:46:01,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 114 transitions, 1260 flow [2023-08-30 07:46:01,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 114 transitions, 1168 flow, removed 43 selfloop flow, removed 1 redundant places. [2023-08-30 07:46:01,633 INFO L231 Difference]: Finished difference. Result has 114 places, 102 transitions, 949 flow [2023-08-30 07:46:01,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=949, PETRI_PLACES=114, PETRI_TRANSITIONS=102} [2023-08-30 07:46:01,633 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2023-08-30 07:46:01,633 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 102 transitions, 949 flow [2023-08-30 07:46:01,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.75) internal successors, (775), 4 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:46:01,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:46:01,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:46:01,642 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 07:46:01,841 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 07:46:01,841 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 07:46:01,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:46:01,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1394923695, now seen corresponding path program 4 times [2023-08-30 07:46:01,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:46:01,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016451368] [2023-08-30 07:46:01,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:46:01,842 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 07:46:01,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:46:01,843 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 07:46:01,845 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 07:46:01,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:46:01,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:46:01,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:46:01,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:46:02,019 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 07:46:02,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:46:02,129 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 07:46:02,130 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:46:02,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016451368] [2023-08-30 07:46:02,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016451368] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:46:02,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:46:02,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-08-30 07:46:02,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652928239] [2023-08-30 07:46:02,131 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:46:02,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 07:46:02,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:46:02,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 07:46:02,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-08-30 07:46:02,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 473 [2023-08-30 07:46:02,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 102 transitions, 949 flow. Second operand has 11 states, 11 states have (on average 189.36363636363637) internal successors, (2083), 11 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:46:02,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:46:02,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 473 [2023-08-30 07:46:02,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:46:03,747 INFO L130 PetriNetUnfolder]: 3423/6487 cut-off events. [2023-08-30 07:46:03,747 INFO L131 PetriNetUnfolder]: For 25821/25821 co-relation queries the response was YES. [2023-08-30 07:46:03,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29244 conditions, 6487 events. 3423/6487 cut-off events. For 25821/25821 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 43292 event pairs, 520 based on Foata normal form. 440/6847 useless extension candidates. Maximal degree in co-relation 29193. Up to 2702 conditions per place. [2023-08-30 07:46:03,784 INFO L137 encePairwiseOnDemand]: 466/473 looper letters, 78 selfloop transitions, 59 changer transitions 4/141 dead transitions. [2023-08-30 07:46:03,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 141 transitions, 1465 flow [2023-08-30 07:46:03,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 07:46:03,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 07:46:03,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1931 transitions. [2023-08-30 07:46:03,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40824524312896404 [2023-08-30 07:46:03,788 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1931 transitions. [2023-08-30 07:46:03,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1931 transitions. [2023-08-30 07:46:03,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:46:03,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1931 transitions. [2023-08-30 07:46:03,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 193.1) internal successors, (1931), 10 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:46:03,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 473.0) internal successors, (5203), 11 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:46:03,793 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 473.0) internal successors, (5203), 11 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:46:03,793 INFO L175 Difference]: Start difference. First operand has 114 places, 102 transitions, 949 flow. Second operand 10 states and 1931 transitions. [2023-08-30 07:46:03,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 141 transitions, 1465 flow [2023-08-30 07:46:03,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 141 transitions, 1446 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 07:46:03,887 INFO L231 Difference]: Finished difference. Result has 125 places, 114 transitions, 1231 flow [2023-08-30 07:46:03,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1231, PETRI_PLACES=125, PETRI_TRANSITIONS=114} [2023-08-30 07:46:03,887 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2023-08-30 07:46:03,888 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 114 transitions, 1231 flow [2023-08-30 07:46:03,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 189.36363636363637) internal successors, (2083), 11 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:46:03,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:46:03,888 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:46:03,896 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 (22)] Ended with exit code 0 [2023-08-30 07:46:04,092 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 07:46:04,093 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 07:46:04,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:46:04,093 INFO L85 PathProgramCache]: Analyzing trace with hash -516239137, now seen corresponding path program 3 times [2023-08-30 07:46:04,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:46:04,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [329910770] [2023-08-30 07:46:04,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:46:04,094 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 07:46:04,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:46:04,095 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 07:46:04,097 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 07:46:04,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 07:46:04,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:46:04,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 07:46:04,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:46:04,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:46:04,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:46:04,249 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:46:04,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [329910770] [2023-08-30 07:46:04,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [329910770] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:46:04,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:46:04,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 07:46:04,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860993161] [2023-08-30 07:46:04,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:46:04,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:46:04,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:46:04,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:46:04,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:46:04,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 473 [2023-08-30 07:46:04,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 114 transitions, 1231 flow. Second operand has 6 states, 6 states have (on average 190.83333333333334) internal successors, (1145), 6 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:46:04,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:46:04,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 473 [2023-08-30 07:46:04,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:46:05,322 INFO L130 PetriNetUnfolder]: 3103/5627 cut-off events. [2023-08-30 07:46:05,322 INFO L131 PetriNetUnfolder]: For 27771/27771 co-relation queries the response was YES. [2023-08-30 07:46:05,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28869 conditions, 5627 events. 3103/5627 cut-off events. For 27771/27771 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 34159 event pairs, 960 based on Foata normal form. 80/5627 useless extension candidates. Maximal degree in co-relation 28815. Up to 4302 conditions per place. [2023-08-30 07:46:05,363 INFO L137 encePairwiseOnDemand]: 467/473 looper letters, 98 selfloop transitions, 17 changer transitions 5/120 dead transitions. [2023-08-30 07:46:05,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 120 transitions, 1492 flow [2023-08-30 07:46:05,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:46:05,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:46:05,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1159 transitions. [2023-08-30 07:46:05,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083861874559549 [2023-08-30 07:46:05,366 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1159 transitions. [2023-08-30 07:46:05,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1159 transitions. [2023-08-30 07:46:05,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:46:05,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1159 transitions. [2023-08-30 07:46:05,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 193.16666666666666) internal successors, (1159), 6 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:46:05,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:46:05,375 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:46:05,375 INFO L175 Difference]: Start difference. First operand has 125 places, 114 transitions, 1231 flow. Second operand 6 states and 1159 transitions. [2023-08-30 07:46:05,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 120 transitions, 1492 flow [2023-08-30 07:46:05,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 120 transitions, 1359 flow, removed 36 selfloop flow, removed 7 redundant places. [2023-08-30 07:46:05,556 INFO L231 Difference]: Finished difference. Result has 123 places, 111 transitions, 1119 flow [2023-08-30 07:46:05,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1119, PETRI_PLACES=123, PETRI_TRANSITIONS=111} [2023-08-30 07:46:05,558 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 79 predicate places. [2023-08-30 07:46:05,558 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 111 transitions, 1119 flow [2023-08-30 07:46:05,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 190.83333333333334) internal successors, (1145), 6 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:46:05,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:46:05,559 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:46:05,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2023-08-30 07:46:05,766 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 07:46:05,766 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 07:46:05,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:46:05,767 INFO L85 PathProgramCache]: Analyzing trace with hash -933034719, now seen corresponding path program 1 times [2023-08-30 07:46:05,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:46:05,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2068066641] [2023-08-30 07:46:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:46:05,767 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 07:46:05,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:46:05,768 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 07:46:05,770 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 07:46:05,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:46:05,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 07:46:05,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:46:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:46:05,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:46:06,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:46:06,090 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:46:06,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2068066641] [2023-08-30 07:46:06,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2068066641] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:46:06,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:46:06,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 07:46:06,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50242277] [2023-08-30 07:46:06,091 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:46:06,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:46:06,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:46:06,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:46:06,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:46:06,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 473 [2023-08-30 07:46:06,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 111 transitions, 1119 flow. Second operand has 10 states, 10 states have (on average 196.6) internal successors, (1966), 10 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:46:06,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:46:06,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 473 [2023-08-30 07:46:06,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:46:08,428 INFO L130 PetriNetUnfolder]: 4043/7287 cut-off events. [2023-08-30 07:46:08,428 INFO L131 PetriNetUnfolder]: For 27495/27735 co-relation queries the response was YES. [2023-08-30 07:46:08,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34109 conditions, 7287 events. 4043/7287 cut-off events. For 27495/27735 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 46871 event pairs, 200 based on Foata normal form. 1020/8187 useless extension candidates. Maximal degree in co-relation 34057. Up to 3002 conditions per place. [2023-08-30 07:46:08,497 INFO L137 encePairwiseOnDemand]: 468/473 looper letters, 100 selfloop transitions, 64 changer transitions 0/168 dead transitions. [2023-08-30 07:46:08,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 168 transitions, 1815 flow [2023-08-30 07:46:08,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 07:46:08,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 07:46:08,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1999 transitions. [2023-08-30 07:46:08,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226215644820296 [2023-08-30 07:46:08,501 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1999 transitions. [2023-08-30 07:46:08,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1999 transitions. [2023-08-30 07:46:08,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:46:08,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1999 transitions. [2023-08-30 07:46:08,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 199.9) internal successors, (1999), 10 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:46:08,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 473.0) internal successors, (5203), 11 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:46:08,508 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 473.0) internal successors, (5203), 11 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:46:08,508 INFO L175 Difference]: Start difference. First operand has 123 places, 111 transitions, 1119 flow. Second operand 10 states and 1999 transitions. [2023-08-30 07:46:08,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 168 transitions, 1815 flow [2023-08-30 07:46:08,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 168 transitions, 1681 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-30 07:46:08,754 INFO L231 Difference]: Finished difference. Result has 123 places, 123 transitions, 1267 flow [2023-08-30 07:46:08,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1267, PETRI_PLACES=123, PETRI_TRANSITIONS=123} [2023-08-30 07:46:08,755 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 79 predicate places. [2023-08-30 07:46:08,755 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 123 transitions, 1267 flow [2023-08-30 07:46:08,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 196.6) internal successors, (1966), 10 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:46:08,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:46:08,756 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:46:08,766 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 (24)] Ended with exit code 0 [2023-08-30 07:46:08,967 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 07:46:08,967 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 07:46:08,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:46:08,967 INFO L85 PathProgramCache]: Analyzing trace with hash 96043941, now seen corresponding path program 2 times [2023-08-30 07:46:08,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:46:08,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602322229] [2023-08-30 07:46:08,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:46:08,968 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 07:46:08,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:46:08,969 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 07:46:08,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 07:46:09,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:46:09,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:46:09,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:46:09,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:46:15,934 WARN L222 SmtUtils]: Spent 6.00s on a formula simplification. DAG size of input: 780 DAG size of output: 204 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-08-30 07:46:15,936 INFO L321 Elim1Store]: treesize reduction 1224, result has 22.0 percent of original size [2023-08-30 07:46:15,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 0 disjoint index pairs (out of 190 index pairs), introduced 36 new quantified variables, introduced 190 case distinctions, treesize of input 21313 treesize of output 583 [2023-08-30 07:56:30,368 WARN L222 SmtUtils]: Spent 23.97s on a formula simplification. DAG size of input: 3853 DAG size of output: 3880 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 07:56:41,168 WARN L222 SmtUtils]: Spent 6.96s on a formula simplification. DAG size of input: 3843 DAG size of output: 3843 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15