./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-channel-sum.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 c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:57:20,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:57:20,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:57:20,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:57:20,367 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:57:20,369 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:57:20,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:57:20,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:57:20,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:57:20,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:57:20,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:57:20,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:57:20,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:57:20,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:57:20,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:57:20,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:57:20,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:57:20,390 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:57:20,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:57:20,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:57:20,409 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:57:20,410 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:57:20,410 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:57:20,411 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:57:20,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:57:20,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:57:20,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:57:20,417 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:57:20,418 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:57:20,421 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:57:20,421 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:57:20,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:57:20,424 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:57:20,425 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:57:20,425 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:57:20,425 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:57:20,426 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:57:20,426 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:57:20,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:57:20,427 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:57:20,427 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:57:20,429 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:57:20,456 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:57:20,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:57:20,457 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:57:20,457 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:57:20,458 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:57:20,458 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:57:20,458 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:57:20,459 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:57:20,459 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:57:20,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:57:20,459 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:57:20,460 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:57:20,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:57:20,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:57:20,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:57:20,460 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:57:20,460 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:57:20,460 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:57:20,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:57:20,461 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:57:20,461 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:57:20,461 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:57:20,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:57:20,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:57:20,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:57:20,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:57:20,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:57:20,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:57:20,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:57:20,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:57:20,462 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:57:20,462 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:57:20,463 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:57:20,463 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:57:20,463 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:57:20,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:57:20,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:57:20,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:57:20,720 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:57:20,720 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:57:20,721 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-08-29 23:57:21,721 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:57:21,883 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:57:21,884 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-08-29 23:57:21,889 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac72d536c/43fbb988daf04e6ba237e9aefce91d90/FLAGc3910fa6d [2023-08-29 23:57:21,902 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac72d536c/43fbb988daf04e6ba237e9aefce91d90 [2023-08-29 23:57:21,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:57:21,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:57:21,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:57:21,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:57:21,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:57:21,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:57:21" (1/1) ... [2023-08-29 23:57:21,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3656a958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:21, skipping insertion in model container [2023-08-29 23:57:21,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:57:21" (1/1) ... [2023-08-29 23:57:21,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:57:21,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:57:22,040 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c[2947,2960] [2023-08-29 23:57:22,046 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:57:22,054 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) [2023-08-29 23:57:22,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@e47051b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:22, skipping insertion in model container [2023-08-29 23:57:22,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:57:22,056 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 23:57:22,057 INFO L158 Benchmark]: Toolchain (without parser) took 151.99ms. Allocated memory is still 71.3MB. Free memory was 47.7MB in the beginning and 37.9MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 23:57:22,058 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 71.3MB. Free memory is still 49.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 23:57:22,058 INFO L158 Benchmark]: CACSL2BoogieTranslator took 149.04ms. Allocated memory is still 71.3MB. Free memory was 47.4MB in the beginning and 37.9MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-29 23:57:22,059 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 71.3MB. Free memory is still 49.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 149.04ms. Allocated memory is still 71.3MB. Free memory was 47.4MB in the beginning and 37.9MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 114]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-channel-sum.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 c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:57:23,515 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:57:23,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:57:23,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:57:23,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:57:23,564 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:57:23,565 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:57:23,566 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:57:23,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:57:23,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:57:23,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:57:23,568 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:57:23,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:57:23,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:57:23,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:57:23,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:57:23,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:57:23,571 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:57:23,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:57:23,573 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:57:23,574 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:57:23,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:57:23,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:57:23,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:57:23,587 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:57:23,587 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:57:23,587 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:57:23,588 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:57:23,588 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:57:23,589 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:57:23,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:57:23,589 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:57:23,590 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:57:23,590 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:57:23,591 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:57:23,591 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:57:23,591 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:57:23,592 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:57:23,592 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:57:23,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:57:23,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:57:23,594 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 23:57:23,612 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:57:23,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:57:23,613 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:57:23,613 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:57:23,614 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:57:23,614 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:57:23,615 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:57:23,615 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:57:23,615 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:57:23,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:57:23,615 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:57:23,615 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:57:23,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:57:23,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:57:23,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:57:23,616 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:57:23,616 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:57:23,616 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:57:23,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:57:23,617 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:57:23,617 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 23:57:23,617 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 23:57:23,617 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:57:23,617 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:57:23,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:57:23,618 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:57:23,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:57:23,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:57:23,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:57:23,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:57:23,618 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 23:57:23,618 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 23:57:23,619 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:57:23,619 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:57:23,619 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:57:23,619 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 23:57:23,619 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:57:23,619 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:57:23,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:57:23,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:57:23,876 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:57:23,876 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:57:23,877 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:57:23,878 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-08-29 23:57:24,850 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:57:25,045 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:57:25,045 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-08-29 23:57:25,067 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d34c5d80/d85c971662df446ebb497c13b784e7dc/FLAGf57c1a9c1 [2023-08-29 23:57:25,081 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d34c5d80/d85c971662df446ebb497c13b784e7dc [2023-08-29 23:57:25,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:57:25,084 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:57:25,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:57:25,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:57:25,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:57:25,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:57:25" (1/1) ... [2023-08-29 23:57:25,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b58b8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:25, skipping insertion in model container [2023-08-29 23:57:25,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:57:25" (1/1) ... [2023-08-29 23:57:25,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:57:25,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:57:25,227 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c[2947,2960] [2023-08-29 23:57:25,232 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:57:25,239 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 23:57:25,242 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:57:25,249 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c[2947,2960] [2023-08-29 23:57:25,253 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:57:25,263 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:57:25,276 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c[2947,2960] [2023-08-29 23:57:25,288 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:57:25,294 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:57:25,301 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:57:25,305 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:57:25,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:25 WrapperNode [2023-08-29 23:57:25,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:57:25,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:57:25,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:57:25,307 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:57:25,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:25" (1/1) ... [2023-08-29 23:57:25,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:25" (1/1) ... [2023-08-29 23:57:25,331 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 152 [2023-08-29 23:57:25,331 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:57:25,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:57:25,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:57:25,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:57:25,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:25" (1/1) ... [2023-08-29 23:57:25,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:25" (1/1) ... [2023-08-29 23:57:25,342 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:25" (1/1) ... [2023-08-29 23:57:25,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:25" (1/1) ... [2023-08-29 23:57:25,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:25" (1/1) ... [2023-08-29 23:57:25,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:25" (1/1) ... [2023-08-29 23:57:25,351 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:25" (1/1) ... [2023-08-29 23:57:25,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:25" (1/1) ... [2023-08-29 23:57:25,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:57:25,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:57:25,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:57:25,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:57:25,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:25" (1/1) ... [2023-08-29 23:57:25,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:57:25,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:57:25,382 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) [2023-08-29 23:57:25,387 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 [2023-08-29 23:57:25,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:57:25,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 23:57:25,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:57:25,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 23:57:25,441 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:57:25,441 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:57:25,441 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:57:25,441 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:57:25,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 23:57:25,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 23:57:25,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 23:57:25,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:57:25,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:57:25,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:57:25,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 23:57:25,443 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 23:57:25,562 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:57:25,563 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:57:25,893 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:57:25,942 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:57:25,943 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-29 23:57:25,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:57:25 BoogieIcfgContainer [2023-08-29 23:57:25,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:57:25,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:57:25,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:57:25,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:57:25,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:57:25" (1/3) ... [2023-08-29 23:57:25,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5660898b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:57:25, skipping insertion in model container [2023-08-29 23:57:25,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:57:25" (2/3) ... [2023-08-29 23:57:25,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5660898b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:57:25, skipping insertion in model container [2023-08-29 23:57:25,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:57:25" (3/3) ... [2023-08-29 23:57:25,950 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2023-08-29 23:57:25,960 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:57:25,960 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-08-29 23:57:25,960 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:57:26,039 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 23:57:26,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 152 transitions, 320 flow [2023-08-29 23:57:26,125 INFO L130 PetriNetUnfolder]: 11/150 cut-off events. [2023-08-29 23:57:26,126 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:57:26,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 150 events. 11/150 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 209 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 99. Up to 2 conditions per place. [2023-08-29 23:57:26,129 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 152 transitions, 320 flow [2023-08-29 23:57:26,134 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 146 transitions, 304 flow [2023-08-29 23:57:26,144 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:57:26,151 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 146 transitions, 304 flow [2023-08-29 23:57:26,154 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 146 transitions, 304 flow [2023-08-29 23:57:26,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 146 transitions, 304 flow [2023-08-29 23:57:26,193 INFO L130 PetriNetUnfolder]: 11/146 cut-off events. [2023-08-29 23:57:26,194 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:57:26,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 146 events. 11/146 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 209 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 99. Up to 2 conditions per place. [2023-08-29 23:57:26,197 INFO L119 LiptonReduction]: Number of co-enabled transitions 1984 [2023-08-29 23:57:37,513 INFO L134 LiptonReduction]: Checked pairs total: 2411 [2023-08-29 23:57:37,513 INFO L136 LiptonReduction]: Total number of compositions: 161 [2023-08-29 23:57:37,528 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:57:37,536 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;@79406cfe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:57:37,536 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-08-29 23:57:37,544 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 23:57:37,544 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:57:37,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:57:37,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:57:37,545 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-29 23:57:37,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:57:37,548 INFO L85 PathProgramCache]: Analyzing trace with hash 20705, now seen corresponding path program 1 times [2023-08-29 23:57:37,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:57:37,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1145708275] [2023-08-29 23:57:37,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:57:37,556 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:57:37,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:57:37,559 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) [2023-08-29 23:57:37,571 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 [2023-08-29 23:57:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:57:37,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:57:37,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:57:37,797 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:57:37,797 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 [2023-08-29 23:57:37,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:57:37,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:57:37,830 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:57:37,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1145708275] [2023-08-29 23:57:37,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1145708275] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:57:37,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:57:37,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:57:37,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976897256] [2023-08-29 23:57:37,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:57:37,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:57:37,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:57:37,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:57:37,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:57:38,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 313 [2023-08-29 23:57:38,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:38,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:57:38,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 313 [2023-08-29 23:57:38,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:57:38,267 INFO L130 PetriNetUnfolder]: 1065/1520 cut-off events. [2023-08-29 23:57:38,267 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-29 23:57:38,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3076 conditions, 1520 events. 1065/1520 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 7469 event pairs, 528 based on Foata normal form. 0/417 useless extension candidates. Maximal degree in co-relation 1356. Up to 756 conditions per place. [2023-08-29 23:57:38,275 INFO L137 encePairwiseOnDemand]: 309/313 looper letters, 60 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-29 23:57:38,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 64 transitions, 276 flow [2023-08-29 23:57:38,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:57:38,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:57:38,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 452 transitions. [2023-08-29 23:57:38,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48136315228966986 [2023-08-29 23:57:38,285 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 452 transitions. [2023-08-29 23:57:38,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 452 transitions. [2023-08-29 23:57:38,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:57:38,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 452 transitions. [2023-08-29 23:57:38,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:38,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:38,294 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:38,295 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 82 flow. Second operand 3 states and 452 transitions. [2023-08-29 23:57:38,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 64 transitions, 276 flow [2023-08-29 23:57:38,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 64 transitions, 260 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 23:57:38,298 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 84 flow [2023-08-29 23:57:38,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, 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=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2023-08-29 23:57:38,301 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2023-08-29 23:57:38,301 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 84 flow [2023-08-29 23:57:38,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:38,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:57:38,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:57:38,328 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 (2)] Ended with exit code 0 [2023-08-29 23:57:38,509 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 [2023-08-29 23:57:38,509 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-29 23:57:38,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:57:38,510 INFO L85 PathProgramCache]: Analyzing trace with hash 20787, now seen corresponding path program 1 times [2023-08-29 23:57:38,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:57:38,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313612432] [2023-08-29 23:57:38,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:57:38,510 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 [2023-08-29 23:57:38,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:57:38,511 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) [2023-08-29 23:57:38,515 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 [2023-08-29 23:57:38,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:57:38,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 23:57:38,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:57:38,611 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2023-08-29 23:57:38,612 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 [2023-08-29 23:57:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:57:38,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:57:38,644 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:57:38,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313612432] [2023-08-29 23:57:38,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313612432] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:57:38,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:57:38,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:57:38,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127795071] [2023-08-29 23:57:38,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:57:38,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:57:38,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:57:38,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:57:38,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:57:38,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 313 [2023-08-29 23:57:38,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:38,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:57:38,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 313 [2023-08-29 23:57:38,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:57:38,875 INFO L130 PetriNetUnfolder]: 805/1174 cut-off events. [2023-08-29 23:57:38,876 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:57:38,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2359 conditions, 1174 events. 805/1174 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 5694 event pairs, 396 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 1177. Up to 1162 conditions per place. [2023-08-29 23:57:38,880 INFO L137 encePairwiseOnDemand]: 310/313 looper letters, 30 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-08-29 23:57:38,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 33 transitions, 142 flow [2023-08-29 23:57:38,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:57:38,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:57:38,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 410 transitions. [2023-08-29 23:57:38,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4366347177848775 [2023-08-29 23:57:38,883 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 410 transitions. [2023-08-29 23:57:38,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 410 transitions. [2023-08-29 23:57:38,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:57:38,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 410 transitions. [2023-08-29 23:57:38,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:38,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:38,886 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:38,886 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 84 flow. Second operand 3 states and 410 transitions. [2023-08-29 23:57:38,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 33 transitions, 142 flow [2023-08-29 23:57:38,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 33 transitions, 140 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:57:38,887 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 80 flow [2023-08-29 23:57:38,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2023-08-29 23:57:38,888 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -3 predicate places. [2023-08-29 23:57:38,888 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 80 flow [2023-08-29 23:57:38,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:38,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:57:38,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:57:38,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-08-29 23:57:39,095 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 [2023-08-29 23:57:39,095 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-29 23:57:39,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:57:39,096 INFO L85 PathProgramCache]: Analyzing trace with hash 20786, now seen corresponding path program 1 times [2023-08-29 23:57:39,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:57:39,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503978454] [2023-08-29 23:57:39,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:57:39,097 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 [2023-08-29 23:57:39,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:57:39,100 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) [2023-08-29 23:57:39,103 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 [2023-08-29 23:57:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:57:39,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:57:39,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:57:39,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:57:39,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:57:39,218 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 23:57:39,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-29 23:57:39,228 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 [2023-08-29 23:57:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:57:39,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:57:39,288 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:57:39,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503978454] [2023-08-29 23:57:39,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503978454] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:57:39,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:57:39,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:57:39,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443571359] [2023-08-29 23:57:39,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:57:39,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:57:39,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:57:39,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:57:39,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:57:39,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 313 [2023-08-29 23:57:39,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:39,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:57:39,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 313 [2023-08-29 23:57:39,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:57:39,531 INFO L130 PetriNetUnfolder]: 545/828 cut-off events. [2023-08-29 23:57:39,531 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:57:39,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1667 conditions, 828 events. 545/828 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 3929 event pairs, 264 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 1659. Up to 816 conditions per place. [2023-08-29 23:57:39,534 INFO L137 encePairwiseOnDemand]: 310/313 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-29 23:57:39,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 134 flow [2023-08-29 23:57:39,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:57:39,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:57:39,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 417 transitions. [2023-08-29 23:57:39,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4440894568690096 [2023-08-29 23:57:39,536 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 417 transitions. [2023-08-29 23:57:39,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 417 transitions. [2023-08-29 23:57:39,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:57:39,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 417 transitions. [2023-08-29 23:57:39,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:39,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:39,539 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:39,539 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 80 flow. Second operand 3 states and 417 transitions. [2023-08-29 23:57:39,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 134 flow [2023-08-29 23:57:39,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 133 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:57:39,540 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 77 flow [2023-08-29 23:57:39,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-08-29 23:57:39,541 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -4 predicate places. [2023-08-29 23:57:39,541 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 77 flow [2023-08-29 23:57:39,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:39,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:57:39,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:57:39,561 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 [2023-08-29 23:57:39,748 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 [2023-08-29 23:57:39,749 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-29 23:57:39,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:57:39,749 INFO L85 PathProgramCache]: Analyzing trace with hash 20703, now seen corresponding path program 1 times [2023-08-29 23:57:39,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:57:39,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932748369] [2023-08-29 23:57:39,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:57:39,750 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 [2023-08-29 23:57:39,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:57:39,751 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) [2023-08-29 23:57:39,753 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 [2023-08-29 23:57:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:57:39,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 23:57:39,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:57:39,812 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 23:57:39,813 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 [2023-08-29 23:57:39,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:57:39,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:57:39,821 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:57:39,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932748369] [2023-08-29 23:57:39,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932748369] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:57:39,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:57:39,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:57:39,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807590642] [2023-08-29 23:57:39,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:57:39,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:57:39,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:57:39,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:57:39,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:57:39,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 313 [2023-08-29 23:57:39,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:39,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:57:39,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 313 [2023-08-29 23:57:39,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:57:40,001 INFO L130 PetriNetUnfolder]: 545/826 cut-off events. [2023-08-29 23:57:40,001 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:57:40,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1664 conditions, 826 events. 545/826 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 3942 event pairs, 264 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 1655. Up to 814 conditions per place. [2023-08-29 23:57:40,005 INFO L137 encePairwiseOnDemand]: 311/313 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-29 23:57:40,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 131 flow [2023-08-29 23:57:40,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:57:40,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:57:40,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 415 transitions. [2023-08-29 23:57:40,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44195953141640043 [2023-08-29 23:57:40,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 415 transitions. [2023-08-29 23:57:40,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 415 transitions. [2023-08-29 23:57:40,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:57:40,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 415 transitions. [2023-08-29 23:57:40,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:40,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:40,010 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:40,010 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 77 flow. Second operand 3 states and 415 transitions. [2023-08-29 23:57:40,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 131 flow [2023-08-29 23:57:40,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:57:40,011 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 76 flow [2023-08-29 23:57:40,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-29 23:57:40,012 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -4 predicate places. [2023-08-29 23:57:40,012 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 76 flow [2023-08-29 23:57:40,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:40,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:57:40,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:57:40,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-08-29 23:57:40,219 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 [2023-08-29 23:57:40,219 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-29 23:57:40,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:57:40,219 INFO L85 PathProgramCache]: Analyzing trace with hash 644704, now seen corresponding path program 1 times [2023-08-29 23:57:40,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:57:40,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853417704] [2023-08-29 23:57:40,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:57:40,221 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 [2023-08-29 23:57:40,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:57:40,223 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) [2023-08-29 23:57:40,266 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 [2023-08-29 23:57:40,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:57:40,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:57:40,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:57:40,325 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:57:40,326 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 [2023-08-29 23:57:40,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:57:40,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:57:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:57:40,505 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:57:40,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853417704] [2023-08-29 23:57:40,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853417704] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:57:40,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:57:40,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 23:57:40,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013338556] [2023-08-29 23:57:40,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:57:40,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:57:40,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:57:40,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:57:40,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:57:40,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 313 [2023-08-29 23:57:40,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 76 flow. Second operand has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:40,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:57:40,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 313 [2023-08-29 23:57:40,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:57:41,282 INFO L130 PetriNetUnfolder]: 819/1242 cut-off events. [2023-08-29 23:57:41,282 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 23:57:41,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2501 conditions, 1242 events. 819/1242 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 6365 event pairs, 396 based on Foata normal form. 0/452 useless extension candidates. Maximal degree in co-relation 2491. Up to 408 conditions per place. [2023-08-29 23:57:41,287 INFO L137 encePairwiseOnDemand]: 309/313 looper letters, 74 selfloop transitions, 7 changer transitions 0/83 dead transitions. [2023-08-29 23:57:41,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 83 transitions, 358 flow [2023-08-29 23:57:41,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:57:41,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:57:41,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 828 transitions. [2023-08-29 23:57:41,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44089456869009586 [2023-08-29 23:57:41,289 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 828 transitions. [2023-08-29 23:57:41,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 828 transitions. [2023-08-29 23:57:41,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:57:41,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 828 transitions. [2023-08-29 23:57:41,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:41,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 313.0) internal successors, (2191), 7 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:41,294 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 313.0) internal successors, (2191), 7 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:41,294 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 76 flow. Second operand 6 states and 828 transitions. [2023-08-29 23:57:41,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 83 transitions, 358 flow [2023-08-29 23:57:41,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 83 transitions, 357 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:57:41,295 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 129 flow [2023-08-29 23:57:41,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=129, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2023-08-29 23:57:41,296 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 4 predicate places. [2023-08-29 23:57:41,296 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 129 flow [2023-08-29 23:57:41,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:41,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:57:41,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 23:57:41,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-08-29 23:57:41,503 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 [2023-08-29 23:57:41,506 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-29 23:57:41,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:57:41,506 INFO L85 PathProgramCache]: Analyzing trace with hash 19992011, now seen corresponding path program 1 times [2023-08-29 23:57:41,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:57:41,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1714125967] [2023-08-29 23:57:41,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:57:41,507 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 [2023-08-29 23:57:41,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:57:41,508 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) [2023-08-29 23:57:41,509 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 [2023-08-29 23:57:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:57:41,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:57:41,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:57:41,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:57:41,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:57:41,617 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 23:57:41,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-29 23:57:41,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-29 23:57:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:57:41,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:57:41,636 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:57:41,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1714125967] [2023-08-29 23:57:41,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1714125967] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:57:41,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:57:41,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:57:41,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544818436] [2023-08-29 23:57:41,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:57:41,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:57:41,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:57:41,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:57:41,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:57:41,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 313 [2023-08-29 23:57:41,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:41,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:57:41,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 313 [2023-08-29 23:57:41,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:57:41,865 INFO L130 PetriNetUnfolder]: 759/1143 cut-off events. [2023-08-29 23:57:41,866 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 23:57:41,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2329 conditions, 1143 events. 759/1143 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 5791 event pairs, 366 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 2314. Up to 1125 conditions per place. [2023-08-29 23:57:41,870 INFO L137 encePairwiseOnDemand]: 310/313 looper letters, 30 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-08-29 23:57:41,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 33 transitions, 187 flow [2023-08-29 23:57:41,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:57:41,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:57:41,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 414 transitions. [2023-08-29 23:57:41,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44089456869009586 [2023-08-29 23:57:41,871 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 414 transitions. [2023-08-29 23:57:41,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 414 transitions. [2023-08-29 23:57:41,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:57:41,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 414 transitions. [2023-08-29 23:57:41,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:41,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:41,876 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:41,876 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 129 flow. Second operand 3 states and 414 transitions. [2023-08-29 23:57:41,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 33 transitions, 187 flow [2023-08-29 23:57:41,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 33 transitions, 177 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-29 23:57:41,877 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 117 flow [2023-08-29 23:57:41,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-08-29 23:57:41,878 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-08-29 23:57:41,878 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 117 flow [2023-08-29 23:57:41,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:41,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:57:41,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 23:57:41,887 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 [2023-08-29 23:57:42,093 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 [2023-08-29 23:57:42,093 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-29 23:57:42,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:57:42,093 INFO L85 PathProgramCache]: Analyzing trace with hash 19992010, now seen corresponding path program 1 times [2023-08-29 23:57:42,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:57:42,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071621814] [2023-08-29 23:57:42,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:57:42,094 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 [2023-08-29 23:57:42,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:57:42,096 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) [2023-08-29 23:57:42,129 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 [2023-08-29 23:57:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:57:42,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 23:57:42,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:57:42,192 INFO L321 Elim1Store]: treesize reduction 43, result has 33.8 percent of original size [2023-08-29 23:57:42,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 29 [2023-08-29 23:57:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:57:42,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:57:42,209 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:57:42,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071621814] [2023-08-29 23:57:42,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071621814] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:57:42,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:57:42,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:57:42,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129816162] [2023-08-29 23:57:42,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:57:42,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:57:42,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:57:42,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:57:42,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:57:42,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 313 [2023-08-29 23:57:42,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:42,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:57:42,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 313 [2023-08-29 23:57:42,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:57:42,416 INFO L130 PetriNetUnfolder]: 699/1044 cut-off events. [2023-08-29 23:57:42,416 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-29 23:57:42,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2128 conditions, 1044 events. 699/1044 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 5145 event pairs, 336 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 2112. Up to 1026 conditions per place. [2023-08-29 23:57:42,421 INFO L137 encePairwiseOnDemand]: 310/313 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-29 23:57:42,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 31 transitions, 171 flow [2023-08-29 23:57:42,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:57:42,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:57:42,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-08-29 23:57:42,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4291799787007455 [2023-08-29 23:57:42,423 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-08-29 23:57:42,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-08-29 23:57:42,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:57:42,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-08-29 23:57:42,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:42,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:42,426 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:42,426 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 117 flow. Second operand 3 states and 403 transitions. [2023-08-29 23:57:42,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 31 transitions, 171 flow [2023-08-29 23:57:42,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 31 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:57:42,429 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 114 flow [2023-08-29 23:57:42,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2023-08-29 23:57:42,430 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2023-08-29 23:57:42,430 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 114 flow [2023-08-29 23:57:42,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:42,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:57:42,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:57:42,443 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 [2023-08-29 23:57:42,637 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 [2023-08-29 23:57:42,637 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-29 23:57:42,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:57:42,638 INFO L85 PathProgramCache]: Analyzing trace with hash 619747812, now seen corresponding path program 1 times [2023-08-29 23:57:42,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:57:42,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834790325] [2023-08-29 23:57:42,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:57:42,638 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 [2023-08-29 23:57:42,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:57:42,653 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) [2023-08-29 23:57:42,656 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 [2023-08-29 23:57:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:57:42,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 23:57:42,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:57:42,748 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 23:57:42,748 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 [2023-08-29 23:57:42,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:57:42,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:57:42,765 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:57:42,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834790325] [2023-08-29 23:57:42,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834790325] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:57:42,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:57:42,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:57:42,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111684930] [2023-08-29 23:57:42,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:57:42,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:57:42,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:57:42,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:57:42,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:57:42,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 313 [2023-08-29 23:57:42,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:42,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:57:42,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 313 [2023-08-29 23:57:42,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:57:43,059 INFO L130 PetriNetUnfolder]: 402/627 cut-off events. [2023-08-29 23:57:43,059 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-29 23:57:43,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1295 conditions, 627 events. 402/627 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 2863 event pairs, 189 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 1278. Up to 605 conditions per place. [2023-08-29 23:57:43,062 INFO L137 encePairwiseOnDemand]: 308/313 looper letters, 22 selfloop transitions, 4 changer transitions 0/28 dead transitions. [2023-08-29 23:57:43,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 28 transitions, 160 flow [2023-08-29 23:57:43,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:57:43,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:57:43,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 515 transitions. [2023-08-29 23:57:43,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41134185303514376 [2023-08-29 23:57:43,064 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 515 transitions. [2023-08-29 23:57:43,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 515 transitions. [2023-08-29 23:57:43,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:57:43,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 515 transitions. [2023-08-29 23:57:43,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:43,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:43,068 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:43,068 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 114 flow. Second operand 4 states and 515 transitions. [2023-08-29 23:57:43,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 28 transitions, 160 flow [2023-08-29 23:57:43,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 28 transitions, 159 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:57:43,070 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 115 flow [2023-08-29 23:57:43,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-08-29 23:57:43,072 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2023-08-29 23:57:43,072 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 115 flow [2023-08-29 23:57:43,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:43,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:57:43,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:57:43,085 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 [2023-08-29 23:57:43,280 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 [2023-08-29 23:57:43,280 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-29 23:57:43,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:57:43,280 INFO L85 PathProgramCache]: Analyzing trace with hash 619747813, now seen corresponding path program 1 times [2023-08-29 23:57:43,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:57:43,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577523170] [2023-08-29 23:57:43,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:57:43,281 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 [2023-08-29 23:57:43,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:57:43,283 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) [2023-08-29 23:57:43,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 23:57:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:57:43,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 23:57:43,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:57:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:57:43,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:57:43,363 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:57:43,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577523170] [2023-08-29 23:57:43,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1577523170] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:57:43,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:57:43,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:57:43,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464059236] [2023-08-29 23:57:43,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:57:43,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:57:43,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:57:43,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:57:43,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:57:43,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 313 [2023-08-29 23:57:43,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:43,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:57:43,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 313 [2023-08-29 23:57:43,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:57:43,602 INFO L130 PetriNetUnfolder]: 366/672 cut-off events. [2023-08-29 23:57:43,602 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2023-08-29 23:57:43,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1397 conditions, 672 events. 366/672 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3504 event pairs, 63 based on Foata normal form. 0/423 useless extension candidates. Maximal degree in co-relation 1379. Up to 247 conditions per place. [2023-08-29 23:57:43,604 INFO L137 encePairwiseOnDemand]: 307/313 looper letters, 46 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2023-08-29 23:57:43,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 52 transitions, 268 flow [2023-08-29 23:57:43,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:57:43,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:57:43,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 679 transitions. [2023-08-29 23:57:43,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4338658146964856 [2023-08-29 23:57:43,607 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 679 transitions. [2023-08-29 23:57:43,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 679 transitions. [2023-08-29 23:57:43,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:57:43,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 679 transitions. [2023-08-29 23:57:43,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.8) internal successors, (679), 5 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:43,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 313.0) internal successors, (1878), 6 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:43,623 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 313.0) internal successors, (1878), 6 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:43,624 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 115 flow. Second operand 5 states and 679 transitions. [2023-08-29 23:57:43,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 52 transitions, 268 flow [2023-08-29 23:57:43,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 52 transitions, 263 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:57:43,625 INFO L231 Difference]: Finished difference. Result has 46 places, 32 transitions, 154 flow [2023-08-29 23:57:43,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=46, PETRI_TRANSITIONS=32} [2023-08-29 23:57:43,625 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 7 predicate places. [2023-08-29 23:57:43,625 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 32 transitions, 154 flow [2023-08-29 23:57:43,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:43,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:57:43,625 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 23:57:43,657 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 [2023-08-29 23:57:43,826 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 [2023-08-29 23:57:43,826 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-29 23:57:43,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:57:43,826 INFO L85 PathProgramCache]: Analyzing trace with hash 2029336737, now seen corresponding path program 2 times [2023-08-29 23:57:43,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:57:43,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [888384734] [2023-08-29 23:57:43,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:57:43,827 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 [2023-08-29 23:57:43,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:57:43,828 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) [2023-08-29 23:57:43,830 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 [2023-08-29 23:57:43,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:57:43,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:57:43,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 23:57:43,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:57:43,965 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:57:43,965 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 [2023-08-29 23:57:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:57:44,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:57:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:57:44,522 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:57:44,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [888384734] [2023-08-29 23:57:44,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [888384734] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:57:44,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:57:44,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 23:57:44,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526404393] [2023-08-29 23:57:44,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:57:44,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:57:44,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:57:44,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:57:44,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:57:47,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 313 [2023-08-29 23:57:47,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 32 transitions, 154 flow. Second operand has 12 states, 12 states have (on average 126.0) internal successors, (1512), 12 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:47,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:57:47,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 313 [2023-08-29 23:57:47,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:57:49,227 INFO L130 PetriNetUnfolder]: 1202/2134 cut-off events. [2023-08-29 23:57:49,227 INFO L131 PetriNetUnfolder]: For 1749/1865 co-relation queries the response was YES. [2023-08-29 23:57:49,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5906 conditions, 2134 events. 1202/2134 cut-off events. For 1749/1865 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13510 event pairs, 690 based on Foata normal form. 115/1686 useless extension candidates. Maximal degree in co-relation 5884. Up to 511 conditions per place. [2023-08-29 23:57:49,237 INFO L137 encePairwiseOnDemand]: 309/313 looper letters, 202 selfloop transitions, 12 changer transitions 0/217 dead transitions. [2023-08-29 23:57:49,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 217 transitions, 1286 flow [2023-08-29 23:57:49,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 23:57:49,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 23:57:49,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1690 transitions. [2023-08-29 23:57:49,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44994675186368477 [2023-08-29 23:57:49,257 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1690 transitions. [2023-08-29 23:57:49,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1690 transitions. [2023-08-29 23:57:49,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:57:49,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1690 transitions. [2023-08-29 23:57:49,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 140.83333333333334) internal successors, (1690), 12 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:49,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 313.0) internal successors, (4069), 13 states have internal predecessors, (4069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:49,264 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 313.0) internal successors, (4069), 13 states have internal predecessors, (4069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:49,264 INFO L175 Difference]: Start difference. First operand has 46 places, 32 transitions, 154 flow. Second operand 12 states and 1690 transitions. [2023-08-29 23:57:49,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 217 transitions, 1286 flow [2023-08-29 23:57:49,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 217 transitions, 1286 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 23:57:49,270 INFO L231 Difference]: Finished difference. Result has 64 places, 39 transitions, 253 flow [2023-08-29 23:57:49,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=253, PETRI_PLACES=64, PETRI_TRANSITIONS=39} [2023-08-29 23:57:49,271 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 25 predicate places. [2023-08-29 23:57:49,271 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 39 transitions, 253 flow [2023-08-29 23:57:49,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 126.0) internal successors, (1512), 12 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:49,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:57:49,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:57:49,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 23:57:49,478 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 [2023-08-29 23:57:49,479 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-29 23:57:49,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:57:49,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1418062756, now seen corresponding path program 1 times [2023-08-29 23:57:49,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:57:49,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058019563] [2023-08-29 23:57:49,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:57:49,480 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 [2023-08-29 23:57:49,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:57:49,481 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) [2023-08-29 23:57:49,481 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 [2023-08-29 23:57:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:57:49,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-29 23:57:49,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:57:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:57:49,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:57:49,587 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:57:49,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058019563] [2023-08-29 23:57:49,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058019563] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:57:49,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:57:49,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:57:49,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980401227] [2023-08-29 23:57:49,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:57:49,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:57:49,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:57:49,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:57:49,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:57:49,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 313 [2023-08-29 23:57:49,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 39 transitions, 253 flow. Second operand has 4 states, 4 states have (on average 130.5) internal successors, (522), 4 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:49,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:57:49,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 313 [2023-08-29 23:57:49,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:57:49,866 INFO L130 PetriNetUnfolder]: 1091/1953 cut-off events. [2023-08-29 23:57:49,867 INFO L131 PetriNetUnfolder]: For 1635/1768 co-relation queries the response was YES. [2023-08-29 23:57:49,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5436 conditions, 1953 events. 1091/1953 cut-off events. For 1635/1768 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12287 event pairs, 630 based on Foata normal form. 110/1503 useless extension candidates. Maximal degree in co-relation 5405. Up to 1886 conditions per place. [2023-08-29 23:57:49,878 INFO L137 encePairwiseOnDemand]: 307/313 looper letters, 44 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-08-29 23:57:49,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 50 transitions, 380 flow [2023-08-29 23:57:49,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:57:49,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:57:49,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 551 transitions. [2023-08-29 23:57:49,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44009584664536744 [2023-08-29 23:57:49,879 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 551 transitions. [2023-08-29 23:57:49,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 551 transitions. [2023-08-29 23:57:49,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:57:49,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 551 transitions. [2023-08-29 23:57:49,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.75) internal successors, (551), 4 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:49,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:49,883 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:49,883 INFO L175 Difference]: Start difference. First operand has 64 places, 39 transitions, 253 flow. Second operand 4 states and 551 transitions. [2023-08-29 23:57:49,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 50 transitions, 380 flow [2023-08-29 23:57:49,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 50 transitions, 355 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-29 23:57:49,886 INFO L231 Difference]: Finished difference. Result has 65 places, 40 transitions, 255 flow [2023-08-29 23:57:49,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=255, PETRI_PLACES=65, PETRI_TRANSITIONS=40} [2023-08-29 23:57:49,886 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 26 predicate places. [2023-08-29 23:57:49,886 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 40 transitions, 255 flow [2023-08-29 23:57:49,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.5) internal successors, (522), 4 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:49,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:57:49,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:57:49,895 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 [2023-08-29 23:57:50,093 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 [2023-08-29 23:57:50,094 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-29 23:57:50,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:57:50,094 INFO L85 PathProgramCache]: Analyzing trace with hash 374548029, now seen corresponding path program 1 times [2023-08-29 23:57:50,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:57:50,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1095207710] [2023-08-29 23:57:50,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:57:50,095 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 [2023-08-29 23:57:50,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:57:50,096 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) [2023-08-29 23:57:50,098 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 [2023-08-29 23:57:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:57:50,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:57:50,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:57:50,268 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:57:50,268 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 [2023-08-29 23:57:50,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:57:50,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:57:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:57:50,934 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:57:50,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1095207710] [2023-08-29 23:57:50,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1095207710] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:57:50,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:57:50,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-29 23:57:50,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248613185] [2023-08-29 23:57:50,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:57:50,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:57:50,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:57:50,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:57:50,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:57:54,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 313 [2023-08-29 23:57:54,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 40 transitions, 255 flow. Second operand has 8 states, 8 states have (on average 121.75) internal successors, (974), 8 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:54,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:57:54,682 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 313 [2023-08-29 23:57:54,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:57:58,252 INFO L130 PetriNetUnfolder]: 890/1620 cut-off events. [2023-08-29 23:57:58,252 INFO L131 PetriNetUnfolder]: For 1779/1876 co-relation queries the response was YES. [2023-08-29 23:57:58,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4839 conditions, 1620 events. 890/1620 cut-off events. For 1779/1876 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 9914 event pairs, 504 based on Foata normal form. 144/1537 useless extension candidates. Maximal degree in co-relation 4805. Up to 1249 conditions per place. [2023-08-29 23:57:58,258 INFO L137 encePairwiseOnDemand]: 306/313 looper letters, 68 selfloop transitions, 12 changer transitions 0/83 dead transitions. [2023-08-29 23:57:58,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 83 transitions, 574 flow [2023-08-29 23:57:58,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 23:57:58,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 23:57:58,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1270 transitions. [2023-08-29 23:57:58,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057507987220447 [2023-08-29 23:57:58,262 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1270 transitions. [2023-08-29 23:57:58,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1270 transitions. [2023-08-29 23:57:58,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:57:58,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1270 transitions. [2023-08-29 23:57:58,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 127.0) internal successors, (1270), 10 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:58,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 313.0) internal successors, (3443), 11 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:58,268 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 313.0) internal successors, (3443), 11 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:58,268 INFO L175 Difference]: Start difference. First operand has 65 places, 40 transitions, 255 flow. Second operand 10 states and 1270 transitions. [2023-08-29 23:57:58,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 83 transitions, 574 flow [2023-08-29 23:57:58,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 83 transitions, 564 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-29 23:57:58,271 INFO L231 Difference]: Finished difference. Result has 74 places, 41 transitions, 293 flow [2023-08-29 23:57:58,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=63, 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=10, PETRI_FLOW=293, PETRI_PLACES=74, PETRI_TRANSITIONS=41} [2023-08-29 23:57:58,272 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 35 predicate places. [2023-08-29 23:57:58,272 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 41 transitions, 293 flow [2023-08-29 23:57:58,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 121.75) internal successors, (974), 8 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:58,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:57:58,273 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:57:58,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-29 23:57:58,479 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 [2023-08-29 23:57:58,480 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-29 23:57:58,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:57:58,480 INFO L85 PathProgramCache]: Analyzing trace with hash 572523676, now seen corresponding path program 2 times [2023-08-29 23:57:58,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:57:58,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90098458] [2023-08-29 23:57:58,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:57:58,481 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 [2023-08-29 23:57:58,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:57:58,481 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) [2023-08-29 23:57:58,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 23:57:58,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 23:57:58,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:57:58,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 23:57:58,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:57:58,619 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:57:58,620 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 [2023-08-29 23:57:58,708 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 23:57:58,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:57:58,709 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:57:58,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90098458] [2023-08-29 23:57:58,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90098458] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:57:58,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:57:58,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:57:58,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272494099] [2023-08-29 23:57:58,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:57:58,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:57:58,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:57:58,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:57:58,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:57:58,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 313 [2023-08-29 23:57:58,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 41 transitions, 293 flow. Second operand has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:58,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:57:58,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 313 [2023-08-29 23:57:58,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:57:58,996 INFO L130 PetriNetUnfolder]: 488/954 cut-off events. [2023-08-29 23:57:58,996 INFO L131 PetriNetUnfolder]: For 2436/2550 co-relation queries the response was YES. [2023-08-29 23:57:58,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2849 conditions, 954 events. 488/954 cut-off events. For 2436/2550 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5351 event pairs, 252 based on Foata normal form. 215/1077 useless extension candidates. Maximal degree in co-relation 2813. Up to 902 conditions per place. [2023-08-29 23:57:59,000 INFO L137 encePairwiseOnDemand]: 308/313 looper letters, 28 selfloop transitions, 7 changer transitions 0/38 dead transitions. [2023-08-29 23:57:59,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 38 transitions, 337 flow [2023-08-29 23:57:59,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:57:59,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:57:59,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 524 transitions. [2023-08-29 23:57:59,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4185303514376997 [2023-08-29 23:57:59,002 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 524 transitions. [2023-08-29 23:57:59,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 524 transitions. [2023-08-29 23:57:59,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:57:59,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 524 transitions. [2023-08-29 23:57:59,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:59,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:59,005 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:59,005 INFO L175 Difference]: Start difference. First operand has 74 places, 41 transitions, 293 flow. Second operand 4 states and 524 transitions. [2023-08-29 23:57:59,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 38 transitions, 337 flow [2023-08-29 23:57:59,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 38 transitions, 284 flow, removed 11 selfloop flow, removed 11 redundant places. [2023-08-29 23:57:59,007 INFO L231 Difference]: Finished difference. Result has 63 places, 38 transitions, 228 flow [2023-08-29 23:57:59,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=63, PETRI_TRANSITIONS=38} [2023-08-29 23:57:59,007 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 24 predicate places. [2023-08-29 23:57:59,008 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 38 transitions, 228 flow [2023-08-29 23:57:59,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:59,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:57:59,008 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-29 23:57:59,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-29 23:57:59,215 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 [2023-08-29 23:57:59,215 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-29 23:57:59,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:57:59,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1856180289, now seen corresponding path program 3 times [2023-08-29 23:57:59,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:57:59,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2645049] [2023-08-29 23:57:59,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:57:59,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:57:59,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:57:59,217 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) [2023-08-29 23:57:59,219 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 [2023-08-29 23:57:59,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-29 23:57:59,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:57:59,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:57:59,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:57:59,391 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:57:59,392 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 [2023-08-29 23:57:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:57:59,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:58:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:58:01,577 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:58:01,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2645049] [2023-08-29 23:58:01,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2645049] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:58:01,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:58:01,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-29 23:58:01,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791355603] [2023-08-29 23:58:01,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:58:01,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 23:58:01,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:58:01,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 23:58:01,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-29 23:58:13,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 313 [2023-08-29 23:58:13,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 38 transitions, 228 flow. Second operand has 24 states, 24 states have (on average 126.0) internal successors, (3024), 24 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:13,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:58:13,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 313 [2023-08-29 23:58:13,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:58:26,780 INFO L130 PetriNetUnfolder]: 1124/2178 cut-off events. [2023-08-29 23:58:26,780 INFO L131 PetriNetUnfolder]: For 3203/3359 co-relation queries the response was YES. [2023-08-29 23:58:26,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6438 conditions, 2178 events. 1124/2178 cut-off events. For 3203/3359 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 12864 event pairs, 576 based on Foata normal form. 165/2310 useless extension candidates. Maximal degree in co-relation 6408. Up to 547 conditions per place. [2023-08-29 23:58:26,788 INFO L137 encePairwiseOnDemand]: 309/313 looper letters, 370 selfloop transitions, 24 changer transitions 0/397 dead transitions. [2023-08-29 23:58:26,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 397 transitions, 2548 flow [2023-08-29 23:58:26,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-29 23:58:26,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-29 23:58:26,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3343 transitions. [2023-08-29 23:58:26,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4450212992545261 [2023-08-29 23:58:26,812 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3343 transitions. [2023-08-29 23:58:26,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3343 transitions. [2023-08-29 23:58:26,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:58:26,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3343 transitions. [2023-08-29 23:58:26,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 139.29166666666666) internal successors, (3343), 24 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:26,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 313.0) internal successors, (7825), 25 states have internal predecessors, (7825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:26,841 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 313.0) internal successors, (7825), 25 states have internal predecessors, (7825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:26,841 INFO L175 Difference]: Start difference. First operand has 63 places, 38 transitions, 228 flow. Second operand 24 states and 3343 transitions. [2023-08-29 23:58:26,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 397 transitions, 2548 flow [2023-08-29 23:58:26,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 397 transitions, 2523 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:58:26,848 INFO L231 Difference]: Finished difference. Result has 97 places, 51 transitions, 407 flow [2023-08-29 23:58:26,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=407, PETRI_PLACES=97, PETRI_TRANSITIONS=51} [2023-08-29 23:58:26,849 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 58 predicate places. [2023-08-29 23:58:26,849 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 51 transitions, 407 flow [2023-08-29 23:58:26,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 126.0) internal successors, (3024), 24 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:26,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:58:26,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:58:26,860 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 [2023-08-29 23:58:27,062 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 [2023-08-29 23:58:27,063 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-29 23:58:27,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:58:27,063 INFO L85 PathProgramCache]: Analyzing trace with hash -705117191, now seen corresponding path program 1 times [2023-08-29 23:58:27,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:58:27,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1357651986] [2023-08-29 23:58:27,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:58:27,064 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 [2023-08-29 23:58:27,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:58:27,069 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) [2023-08-29 23:58:27,070 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 [2023-08-29 23:58:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:58:27,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 23:58:27,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:58:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:58:27,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:58:27,165 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:58:27,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1357651986] [2023-08-29 23:58:27,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1357651986] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:58:27,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:58:27,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:58:27,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470107143] [2023-08-29 23:58:27,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:58:27,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:58:27,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:58:27,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:58:27,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:58:27,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 313 [2023-08-29 23:58:27,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 51 transitions, 407 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:27,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:58:27,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 313 [2023-08-29 23:58:27,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:58:27,576 INFO L130 PetriNetUnfolder]: 1544/2912 cut-off events. [2023-08-29 23:58:27,576 INFO L131 PetriNetUnfolder]: For 3634/3809 co-relation queries the response was YES. [2023-08-29 23:58:27,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8568 conditions, 2912 events. 1544/2912 cut-off events. For 3634/3809 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 17243 event pairs, 576 based on Foata normal form. 175/2875 useless extension candidates. Maximal degree in co-relation 8525. Up to 1901 conditions per place. [2023-08-29 23:58:27,599 INFO L137 encePairwiseOnDemand]: 310/313 looper letters, 48 selfloop transitions, 2 changer transitions 8/60 dead transitions. [2023-08-29 23:58:27,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 60 transitions, 553 flow [2023-08-29 23:58:27,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:58:27,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:58:27,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2023-08-29 23:58:27,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4536741214057508 [2023-08-29 23:58:27,602 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2023-08-29 23:58:27,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2023-08-29 23:58:27,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:58:27,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2023-08-29 23:58:27,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:27,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:27,605 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:27,605 INFO L175 Difference]: Start difference. First operand has 97 places, 51 transitions, 407 flow. Second operand 3 states and 426 transitions. [2023-08-29 23:58:27,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 60 transitions, 553 flow [2023-08-29 23:58:27,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 60 transitions, 505 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-08-29 23:58:27,611 INFO L231 Difference]: Finished difference. Result has 90 places, 48 transitions, 345 flow [2023-08-29 23:58:27,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=345, PETRI_PLACES=90, PETRI_TRANSITIONS=48} [2023-08-29 23:58:27,611 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 51 predicate places. [2023-08-29 23:58:27,612 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 48 transitions, 345 flow [2023-08-29 23:58:27,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:27,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:58:27,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:58:27,631 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 [2023-08-29 23:58:27,818 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 [2023-08-29 23:58:27,819 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-29 23:58:27,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:58:27,819 INFO L85 PathProgramCache]: Analyzing trace with hash 58817730, now seen corresponding path program 1 times [2023-08-29 23:58:27,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:58:27,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383432322] [2023-08-29 23:58:27,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:58:27,820 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 [2023-08-29 23:58:27,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:58:27,839 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) [2023-08-29 23:58:27,840 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 [2023-08-29 23:58:27,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:58:27,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:58:27,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:58:28,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-08-29 23:58:28,039 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 [2023-08-29 23:58:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:58:28,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:58:28,312 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 182 treesize of output 178 [2023-08-29 23:58:28,426 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-29 23:58:28,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 274 treesize of output 182 [2023-08-29 23:58:28,433 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 108 treesize of output 104 [2023-08-29 23:58:30,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:58:30,974 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:58:30,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383432322] [2023-08-29 23:58:30,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383432322] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:58:30,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:58:30,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 23:58:30,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511880518] [2023-08-29 23:58:30,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:58:30,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:58:30,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:58:30,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:58:30,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:58:32,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 313 [2023-08-29 23:58:32,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 48 transitions, 345 flow. Second operand has 12 states, 12 states have (on average 119.83333333333333) internal successors, (1438), 12 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:32,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:58:32,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 313 [2023-08-29 23:58:32,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:58:33,113 INFO L130 PetriNetUnfolder]: 1443/2727 cut-off events. [2023-08-29 23:58:33,114 INFO L131 PetriNetUnfolder]: For 2389/2389 co-relation queries the response was YES. [2023-08-29 23:58:33,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8175 conditions, 2727 events. 1443/2727 cut-off events. For 2389/2389 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 14586 event pairs, 80 based on Foata normal form. 20/2747 useless extension candidates. Maximal degree in co-relation 8130. Up to 881 conditions per place. [2023-08-29 23:58:33,141 INFO L137 encePairwiseOnDemand]: 307/313 looper letters, 55 selfloop transitions, 6 changer transitions 9/71 dead transitions. [2023-08-29 23:58:33,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 71 transitions, 565 flow [2023-08-29 23:58:33,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 23:58:33,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 23:58:33,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 863 transitions. [2023-08-29 23:58:33,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3938840712003651 [2023-08-29 23:58:33,153 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 863 transitions. [2023-08-29 23:58:33,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 863 transitions. [2023-08-29 23:58:33,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:58:33,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 863 transitions. [2023-08-29 23:58:33,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 123.28571428571429) internal successors, (863), 7 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:33,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 313.0) internal successors, (2504), 8 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:33,172 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 313.0) internal successors, (2504), 8 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:33,172 INFO L175 Difference]: Start difference. First operand has 90 places, 48 transitions, 345 flow. Second operand 7 states and 863 transitions. [2023-08-29 23:58:33,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 71 transitions, 565 flow [2023-08-29 23:58:33,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 71 transitions, 542 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-08-29 23:58:33,177 INFO L231 Difference]: Finished difference. Result has 90 places, 50 transitions, 362 flow [2023-08-29 23:58:33,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=362, PETRI_PLACES=90, PETRI_TRANSITIONS=50} [2023-08-29 23:58:33,179 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 51 predicate places. [2023-08-29 23:58:33,179 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 50 transitions, 362 flow [2023-08-29 23:58:33,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 119.83333333333333) internal successors, (1438), 12 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:33,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:58:33,179 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:58:33,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-29 23:58:33,381 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 [2023-08-29 23:58:33,381 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-29 23:58:33,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:58:33,381 INFO L85 PathProgramCache]: Analyzing trace with hash 915687345, now seen corresponding path program 2 times [2023-08-29 23:58:33,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:58:33,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394393504] [2023-08-29 23:58:33,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:58:33,382 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 [2023-08-29 23:58:33,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:58:33,382 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) [2023-08-29 23:58:33,384 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 [2023-08-29 23:58:33,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:58:33,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:58:33,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 23:58:33,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:58:33,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 9 [2023-08-29 23:58:33,684 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 9 treesize of output 7 [2023-08-29 23:58:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:58:33,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:58:33,998 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 23:58:33,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 344 treesize of output 204 [2023-08-29 23:58:34,005 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 204 treesize of output 200 [2023-08-29 23:58:34,012 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 200 treesize of output 196 [2023-08-29 23:58:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:58:34,432 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:58:34,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394393504] [2023-08-29 23:58:34,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394393504] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:58:34,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:58:34,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-08-29 23:58:34,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220680033] [2023-08-29 23:58:34,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:58:34,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:58:34,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:58:34,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:58:34,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:58:35,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 313 [2023-08-29 23:58:35,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 50 transitions, 362 flow. Second operand has 12 states, 12 states have (on average 117.75) internal successors, (1413), 12 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:35,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:58:35,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 313 [2023-08-29 23:58:35,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:58:36,200 INFO L130 PetriNetUnfolder]: 2151/3954 cut-off events. [2023-08-29 23:58:36,201 INFO L131 PetriNetUnfolder]: For 3104/3104 co-relation queries the response was YES. [2023-08-29 23:58:36,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11822 conditions, 3954 events. 2151/3954 cut-off events. For 3104/3104 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 22266 event pairs, 272 based on Foata normal form. 98/4052 useless extension candidates. Maximal degree in co-relation 11778. Up to 1475 conditions per place. [2023-08-29 23:58:36,214 INFO L137 encePairwiseOnDemand]: 305/313 looper letters, 51 selfloop transitions, 6 changer transitions 39/96 dead transitions. [2023-08-29 23:58:36,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 96 transitions, 706 flow [2023-08-29 23:58:36,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 23:58:36,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 23:58:36,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1569 transitions. [2023-08-29 23:58:36,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38559842713197345 [2023-08-29 23:58:36,218 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1569 transitions. [2023-08-29 23:58:36,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1569 transitions. [2023-08-29 23:58:36,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:58:36,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1569 transitions. [2023-08-29 23:58:36,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 120.6923076923077) internal successors, (1569), 13 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:36,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 313.0) internal successors, (4382), 14 states have internal predecessors, (4382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:36,224 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 313.0) internal successors, (4382), 14 states have internal predecessors, (4382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:36,224 INFO L175 Difference]: Start difference. First operand has 90 places, 50 transitions, 362 flow. Second operand 13 states and 1569 transitions. [2023-08-29 23:58:36,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 96 transitions, 706 flow [2023-08-29 23:58:36,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 96 transitions, 692 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-29 23:58:36,259 INFO L231 Difference]: Finished difference. Result has 105 places, 50 transitions, 389 flow [2023-08-29 23:58:36,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=389, PETRI_PLACES=105, PETRI_TRANSITIONS=50} [2023-08-29 23:58:36,259 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 66 predicate places. [2023-08-29 23:58:36,260 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 50 transitions, 389 flow [2023-08-29 23:58:36,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 117.75) internal successors, (1413), 12 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:36,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:58:36,260 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:58:36,281 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 (18)] Ended with exit code 0 [2023-08-29 23:58:36,467 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 [2023-08-29 23:58:36,468 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-29 23:58:36,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:58:36,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1263349585, now seen corresponding path program 3 times [2023-08-29 23:58:36,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:58:36,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [78418752] [2023-08-29 23:58:36,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:58:36,469 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 [2023-08-29 23:58:36,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:58:36,471 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) [2023-08-29 23:58:36,473 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 [2023-08-29 23:58:36,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-29 23:58:36,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:58:36,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 23:58:36,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:58:37,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-08-29 23:58:37,158 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 21 treesize of output 17 [2023-08-29 23:58:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:58:37,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:58:46,085 INFO L321 Elim1Store]: treesize reduction 888, result has 19.1 percent of original size [2023-08-29 23:58:46,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 708 treesize of output 564 [2023-08-29 23:58:46,120 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 317 treesize of output 309 [2023-08-29 23:58:46,135 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 309 treesize of output 301 [2023-08-30 00:02:35,913 WARN L222 SmtUtils]: Spent 13.92s on a formula simplification. DAG size of input: 2457 DAG size of output: 2610 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 00:05:56,142 WARN L222 SmtUtils]: Spent 50.10s on a formula simplification. DAG size of input: 4229 DAG size of output: 4250 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 00:06:07,997 WARN L222 SmtUtils]: Spent 8.23s on a formula simplification. DAG size of input: 4182 DAG size of output: 4170 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 00:11:29,799 WARN L222 SmtUtils]: Spent 59.53s on a formula simplification. DAG size of input: 7569 DAG size of output: 7574 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 00:11:46,202 WARN L222 SmtUtils]: Spent 8.00s on a formula simplification that was a NOOP. DAG size: 7555 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15