./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum2.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 9eb5d9094342cfaa74d8ea4903febd735be5757c093d69b0f8dbb2a26886fda6 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:10:13,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:10:13,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:10:13,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:10:13,264 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:10:13,266 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:10:13,270 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:10:13,272 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:10:13,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:10:13,279 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:10:13,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:10:13,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:10:13,283 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:10:13,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:10:13,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:10:13,291 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:10:13,293 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:10:13,294 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:10:13,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:10:13,301 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:10:13,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:10:13,313 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:10:13,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:10:13,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:10:13,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:10:13,321 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:10:13,321 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:10:13,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:10:13,323 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:10:13,324 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:10:13,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:10:13,326 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:10:13,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:10:13,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:10:13,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:10:13,329 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:10:13,329 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:10:13,330 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:10:13,330 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:10:13,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:10:13,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:10:13,333 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 03:10:13,365 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:10:13,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:10:13,367 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:10:13,367 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:10:13,368 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:10:13,368 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:10:13,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:10:13,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:10:13,369 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:10:13,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:10:13,370 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:10:13,370 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:10:13,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:10:13,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:10:13,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:10:13,371 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:10:13,371 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:10:13,371 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:10:13,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:10:13,371 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:10:13,372 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:10:13,372 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:10:13,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:10:13,372 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:10:13,372 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:10:13,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:10:13,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:10:13,373 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:10:13,373 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 03:10:13,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 03:10:13,373 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:10:13,373 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:10:13,374 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:10:13,374 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:10:13,374 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9eb5d9094342cfaa74d8ea4903febd735be5757c093d69b0f8dbb2a26886fda6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:10:13,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:10:13,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:10:13,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:10:13,675 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:10:13,675 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:10:13,676 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c [2023-09-01 03:10:14,682 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:10:14,832 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:10:14,832 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c [2023-09-01 03:10:14,836 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dca073363/7d0cec2219ae4a308303db8cc72194e6/FLAG14e1e396a [2023-09-01 03:10:14,849 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dca073363/7d0cec2219ae4a308303db8cc72194e6 [2023-09-01 03:10:14,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:10:14,852 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:10:14,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:10:14,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:10:14,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:10:14,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:10:14" (1/1) ... [2023-09-01 03:10:14,857 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48b80d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:14, skipping insertion in model container [2023-09-01 03:10:14,857 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:10:14" (1/1) ... [2023-09-01 03:10:14,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:10:14,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:10:15,004 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-more-array-sum2.wvr.c[2599,2612] [2023-09-01 03:10:15,023 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:10:15,033 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 03:10:15,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@73ae9d5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:15, skipping insertion in model container [2023-09-01 03:10:15,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:10:15,035 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 03:10:15,036 INFO L158 Benchmark]: Toolchain (without parser) took 183.78ms. Allocated memory is still 86.0MB. Free memory was 63.2MB in the beginning and 53.5MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 03:10:15,041 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 60.8MB. Free memory is still 38.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 03:10:15,041 INFO L158 Benchmark]: CACSL2BoogieTranslator took 181.34ms. Allocated memory is still 86.0MB. Free memory was 63.2MB in the beginning and 53.6MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 03:10:15,042 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 60.8MB. Free memory is still 38.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 181.34ms. Allocated memory is still 86.0MB. Free memory was 63.2MB in the beginning and 53.6MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 106]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum2.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 9eb5d9094342cfaa74d8ea4903febd735be5757c093d69b0f8dbb2a26886fda6 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:10:16,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:10:16,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:10:16,722 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:10:16,723 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:10:16,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:10:16,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:10:16,731 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:10:16,732 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:10:16,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:10:16,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:10:16,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:10:16,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:10:16,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:10:16,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:10:16,744 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:10:16,745 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:10:16,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:10:16,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:10:16,750 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:10:16,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:10:16,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:10:16,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:10:16,756 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:10:16,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:10:16,760 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:10:16,760 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:10:16,761 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:10:16,762 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:10:16,763 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:10:16,763 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:10:16,765 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:10:16,766 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:10:16,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:10:16,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:10:16,767 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:10:16,768 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:10:16,768 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:10:16,768 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:10:16,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:10:16,769 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:10:16,770 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 03:10:16,806 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:10:16,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:10:16,807 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:10:16,807 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:10:16,808 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:10:16,808 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:10:16,808 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:10:16,808 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:10:16,808 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:10:16,809 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:10:16,809 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:10:16,809 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:10:16,810 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:10:16,810 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:10:16,810 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:10:16,810 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:10:16,810 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:10:16,810 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:10:16,810 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:10:16,811 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:10:16,811 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 03:10:16,811 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 03:10:16,811 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:10:16,811 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:10:16,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:10:16,811 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:10:16,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:10:16,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:10:16,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:10:16,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:10:16,812 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 03:10:16,812 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 03:10:16,813 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:10:16,813 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:10:16,813 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:10:16,813 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 03:10:16,813 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:10:16,813 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9eb5d9094342cfaa74d8ea4903febd735be5757c093d69b0f8dbb2a26886fda6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:10:17,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:10:17,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:10:17,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:10:17,110 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:10:17,111 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:10:17,112 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c [2023-09-01 03:10:18,185 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:10:18,371 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:10:18,372 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c [2023-09-01 03:10:18,379 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/468f86b84/30db798c26854d8985d3c6280a6973ab/FLAG0c20de674 [2023-09-01 03:10:18,397 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/468f86b84/30db798c26854d8985d3c6280a6973ab [2023-09-01 03:10:18,400 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:10:18,402 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:10:18,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:10:18,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:10:18,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:10:18,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:10:18" (1/1) ... [2023-09-01 03:10:18,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a53f3aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:18, skipping insertion in model container [2023-09-01 03:10:18,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:10:18" (1/1) ... [2023-09-01 03:10:18,414 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:10:18,435 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:10:18,599 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-more-array-sum2.wvr.c[2599,2612] [2023-09-01 03:10:18,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:10:18,623 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 03:10:18,627 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:10:18,637 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-more-array-sum2.wvr.c[2599,2612] [2023-09-01 03:10:18,646 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:10:18,658 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 03:10:18,691 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-more-array-sum2.wvr.c[2599,2612] [2023-09-01 03:10:18,695 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:10:18,702 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:10:18,703 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:10:18,709 INFO L208 MainTranslator]: Completed translation [2023-09-01 03:10:18,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:18 WrapperNode [2023-09-01 03:10:18,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:10:18,711 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 03:10:18,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 03:10:18,712 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 03:10:18,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:18" (1/1) ... [2023-09-01 03:10:18,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:18" (1/1) ... [2023-09-01 03:10:18,799 INFO L138 Inliner]: procedures = 27, calls = 52, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 265 [2023-09-01 03:10:18,800 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 03:10:18,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 03:10:18,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 03:10:18,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 03:10:18,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:18" (1/1) ... [2023-09-01 03:10:18,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:18" (1/1) ... [2023-09-01 03:10:18,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:18" (1/1) ... [2023-09-01 03:10:18,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:18" (1/1) ... [2023-09-01 03:10:18,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:18" (1/1) ... [2023-09-01 03:10:18,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:18" (1/1) ... [2023-09-01 03:10:18,862 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:18" (1/1) ... [2023-09-01 03:10:18,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:18" (1/1) ... [2023-09-01 03:10:18,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 03:10:18,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 03:10:18,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 03:10:18,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 03:10:18,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:18" (1/1) ... [2023-09-01 03:10:18,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:10:18,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:10:18,910 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 03:10:18,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 03:10:18,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 03:10:18,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 03:10:18,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 03:10:18,984 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 03:10:18,984 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 03:10:18,984 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 03:10:18,984 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 03:10:18,984 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 03:10:18,985 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 03:10:18,985 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 03:10:18,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 03:10:18,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 03:10:18,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 03:10:18,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 03:10:18,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 03:10:18,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 03:10:18,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 03:10:18,987 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 03:10:19,129 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 03:10:19,131 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 03:10:19,688 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 03:10:20,015 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 03:10:20,016 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-09-01 03:10:20,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:10:20 BoogieIcfgContainer [2023-09-01 03:10:20,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 03:10:20,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 03:10:20,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 03:10:20,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 03:10:20,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:10:18" (1/3) ... [2023-09-01 03:10:20,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a10e5aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:10:20, skipping insertion in model container [2023-09-01 03:10:20,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:18" (2/3) ... [2023-09-01 03:10:20,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a10e5aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:10:20, skipping insertion in model container [2023-09-01 03:10:20,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:10:20" (3/3) ... [2023-09-01 03:10:20,026 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum2.wvr.c [2023-09-01 03:10:20,038 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 03:10:20,039 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-09-01 03:10:20,039 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 03:10:20,159 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 03:10:20,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 208 transitions, 440 flow [2023-09-01 03:10:20,289 INFO L130 PetriNetUnfolder]: 16/205 cut-off events. [2023-09-01 03:10:20,289 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 03:10:20,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 205 events. 16/205 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 238 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 156. Up to 2 conditions per place. [2023-09-01 03:10:20,294 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 208 transitions, 440 flow [2023-09-01 03:10:20,301 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 201 transitions, 420 flow [2023-09-01 03:10:20,306 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 03:10:20,324 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 201 transitions, 420 flow [2023-09-01 03:10:20,326 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 201 transitions, 420 flow [2023-09-01 03:10:20,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 201 transitions, 420 flow [2023-09-01 03:10:20,373 INFO L130 PetriNetUnfolder]: 16/201 cut-off events. [2023-09-01 03:10:20,374 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 03:10:20,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 201 events. 16/201 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 237 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 156. Up to 2 conditions per place. [2023-09-01 03:10:20,380 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2023-09-01 03:10:47,574 INFO L134 LiptonReduction]: Checked pairs total: 3527 [2023-09-01 03:10:47,575 INFO L136 LiptonReduction]: Total number of compositions: 215 [2023-09-01 03:10:47,588 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 03:10:47,593 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;@432ea093, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 03:10:47,593 INFO L358 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2023-09-01 03:10:47,599 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 03:10:47,599 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:10:47,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:10:47,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:10:47,601 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:10:47,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:10:47,604 INFO L85 PathProgramCache]: Analyzing trace with hash 35161, now seen corresponding path program 1 times [2023-09-01 03:10:47,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:10:47,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1306968703] [2023-09-01 03:10:47,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:10:47,616 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:10:47,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:10:47,619 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:10:47,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 03:10:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:10:47,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:10:47,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:10:47,938 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:10:47,939 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:10:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:10:47,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:10:47,993 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:10:47,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1306968703] [2023-09-01 03:10:47,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1306968703] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:10:47,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:10:47,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:10:47,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791233467] [2023-09-01 03:10:47,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:10:48,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:10:48,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:10:48,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:10:48,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:10:48,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 423 [2023-09-01 03:10:48,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:48,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:10:48,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 423 [2023-09-01 03:10:48,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:10:50,841 INFO L130 PetriNetUnfolder]: 15053/18713 cut-off events. [2023-09-01 03:10:50,842 INFO L131 PetriNetUnfolder]: For 158/158 co-relation queries the response was YES. [2023-09-01 03:10:50,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37660 conditions, 18713 events. 15053/18713 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 1779. Compared 90038 event pairs, 7293 based on Foata normal form. 0/3655 useless extension candidates. Maximal degree in co-relation 16870. Up to 9306 conditions per place. [2023-09-01 03:10:50,975 INFO L137 encePairwiseOnDemand]: 416/423 looper letters, 95 selfloop transitions, 4 changer transitions 0/102 dead transitions. [2023-09-01 03:10:50,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 102 transitions, 438 flow [2023-09-01 03:10:50,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:10:50,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:10:50,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 613 transitions. [2023-09-01 03:10:50,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4830575256107171 [2023-09-01 03:10:50,994 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 613 transitions. [2023-09-01 03:10:50,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 613 transitions. [2023-09-01 03:10:50,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:10:51,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 613 transitions. [2023-09-01 03:10:51,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:51,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:51,012 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:51,013 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 128 flow. Second operand 3 states and 613 transitions. [2023-09-01 03:10:51,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 102 transitions, 438 flow [2023-09-01 03:10:51,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 102 transitions, 414 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 03:10:51,035 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 146 flow [2023-09-01 03:10:51,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2023-09-01 03:10:51,038 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -3 predicate places. [2023-09-01 03:10:51,039 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 146 flow [2023-09-01 03:10:51,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:51,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:10:51,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:10:51,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 03:10:51,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:10:51,248 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:10:51,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:10:51,249 INFO L85 PathProgramCache]: Analyzing trace with hash 35162, now seen corresponding path program 1 times [2023-09-01 03:10:51,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:10:51,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999369306] [2023-09-01 03:10:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:10:51,250 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:10:51,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:10:51,254 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:10:51,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 03:10:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:10:51,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 03:10:51,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:10:51,376 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:10:51,376 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:10:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:10:51,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:10:51,413 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:10:51,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999369306] [2023-09-01 03:10:51,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999369306] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:10:51,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:10:51,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:10:51,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878328667] [2023-09-01 03:10:51,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:10:51,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:10:51,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:10:51,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:10:51,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:10:51,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 423 [2023-09-01 03:10:51,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:51,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:10:51,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 423 [2023-09-01 03:10:51,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:10:53,321 INFO L130 PetriNetUnfolder]: 15067/18723 cut-off events. [2023-09-01 03:10:53,322 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-09-01 03:10:53,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37465 conditions, 18723 events. 15067/18723 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 1878. Compared 90630 event pairs, 7296 based on Foata normal form. 2/3513 useless extension candidates. Maximal degree in co-relation 18721. Up to 18611 conditions per place. [2023-09-01 03:10:53,399 INFO L137 encePairwiseOnDemand]: 420/423 looper letters, 51 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-09-01 03:10:53,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 55 transitions, 246 flow [2023-09-01 03:10:53,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:10:53,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:10:53,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 561 transitions. [2023-09-01 03:10:53,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44208037825059104 [2023-09-01 03:10:53,402 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 561 transitions. [2023-09-01 03:10:53,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 561 transitions. [2023-09-01 03:10:53,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:10:53,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 561 transitions. [2023-09-01 03:10:53,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:53,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:53,407 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:53,407 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 146 flow. Second operand 3 states and 561 transitions. [2023-09-01 03:10:53,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 55 transitions, 246 flow [2023-09-01 03:10:53,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 55 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:10:53,409 INFO L231 Difference]: Finished difference. Result has 55 places, 55 transitions, 136 flow [2023-09-01 03:10:53,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=55, PETRI_TRANSITIONS=55} [2023-09-01 03:10:53,410 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -5 predicate places. [2023-09-01 03:10:53,410 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 55 transitions, 136 flow [2023-09-01 03:10:53,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:53,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:10:53,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:10:53,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-09-01 03:10:53,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:10:53,618 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:10:53,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:10:53,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1093315, now seen corresponding path program 1 times [2023-09-01 03:10:53,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:10:53,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10418992] [2023-09-01 03:10:53,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:10:53,619 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:10:53,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:10:53,625 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:10:53,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 03:10:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:10:53,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:10:53,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:10:53,779 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:10:53,780 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:10:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:10:53,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:10:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:10:54,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:10:54,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10418992] [2023-09-01 03:10:54,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10418992] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:10:54,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:10:54,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 03:10:54,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356371640] [2023-09-01 03:10:54,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:10:54,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:10:54,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:10:54,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:10:54,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:10:54,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 423 [2023-09-01 03:10:54,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:54,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:10:54,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 423 [2023-09-01 03:10:54,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:10:56,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:10:59,370 INFO L130 PetriNetUnfolder]: 22580/28067 cut-off events. [2023-09-01 03:10:59,370 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-09-01 03:10:59,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56158 conditions, 28067 events. 22580/28067 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 2200. Compared 140309 event pairs, 10938 based on Foata normal form. 0/5565 useless extension candidates. Maximal degree in co-relation 56150. Up to 9307 conditions per place. [2023-09-01 03:10:59,461 INFO L137 encePairwiseOnDemand]: 414/423 looper letters, 134 selfloop transitions, 19 changer transitions 0/156 dead transitions. [2023-09-01 03:10:59,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 156 transitions, 674 flow [2023-09-01 03:10:59,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:10:59,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:10:59,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1119 transitions. [2023-09-01 03:10:59,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44089834515366433 [2023-09-01 03:10:59,466 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1119 transitions. [2023-09-01 03:10:59,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1119 transitions. [2023-09-01 03:10:59,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:10:59,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1119 transitions. [2023-09-01 03:10:59,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 186.5) internal successors, (1119), 6 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:59,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:59,472 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:59,472 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 136 flow. Second operand 6 states and 1119 transitions. [2023-09-01 03:10:59,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 156 transitions, 674 flow [2023-09-01 03:10:59,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 156 transitions, 673 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:10:59,475 INFO L231 Difference]: Finished difference. Result has 63 places, 70 transitions, 280 flow [2023-09-01 03:10:59,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=280, PETRI_PLACES=63, PETRI_TRANSITIONS=70} [2023-09-01 03:10:59,475 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2023-09-01 03:10:59,476 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 70 transitions, 280 flow [2023-09-01 03:10:59,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:59,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:10:59,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:10:59,487 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 (4)] Ended with exit code 0 [2023-09-01 03:10:59,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:10:59,683 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:10:59,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:10:59,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1094234, now seen corresponding path program 1 times [2023-09-01 03:10:59,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:10:59,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465519578] [2023-09-01 03:10:59,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:10:59,684 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:10:59,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:10:59,701 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:10:59,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 03:10:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:10:59,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:10:59,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:10:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:10:59,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:10:59,792 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:10:59,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465519578] [2023-09-01 03:10:59,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465519578] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:10:59,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:10:59,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:10:59,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003496895] [2023-09-01 03:10:59,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:10:59,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:10:59,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:10:59,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:10:59,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:10:59,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 423 [2023-09-01 03:10:59,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 70 transitions, 280 flow. Second operand has 4 states, 4 states have (on average 171.75) internal successors, (687), 4 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:59,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:10:59,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 423 [2023-09-01 03:10:59,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:11:01,486 INFO L130 PetriNetUnfolder]: 15075/18738 cut-off events. [2023-09-01 03:11:01,487 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-09-01 03:11:01,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37560 conditions, 18738 events. 15075/18738 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 1878. Compared 90678 event pairs, 7296 based on Foata normal form. 3/3526 useless extension candidates. Maximal degree in co-relation 37547. Up to 18621 conditions per place. [2023-09-01 03:11:01,560 INFO L137 encePairwiseOnDemand]: 416/423 looper letters, 59 selfloop transitions, 7 changer transitions 1/70 dead transitions. [2023-09-01 03:11:01,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 70 transitions, 414 flow [2023-09-01 03:11:01,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:11:01,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:11:01,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 743 transitions. [2023-09-01 03:11:01,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4391252955082742 [2023-09-01 03:11:01,565 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 743 transitions. [2023-09-01 03:11:01,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 743 transitions. [2023-09-01 03:11:01,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:11:01,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 743 transitions. [2023-09-01 03:11:01,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:01,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:01,573 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:01,573 INFO L175 Difference]: Start difference. First operand has 63 places, 70 transitions, 280 flow. Second operand 4 states and 743 transitions. [2023-09-01 03:11:01,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 70 transitions, 414 flow [2023-09-01 03:11:01,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 70 transitions, 395 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 03:11:01,576 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 290 flow [2023-09-01 03:11:01,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=290, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2023-09-01 03:11:01,578 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 7 predicate places. [2023-09-01 03:11:01,578 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 290 flow [2023-09-01 03:11:01,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 171.75) internal successors, (687), 4 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:01,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:11:01,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:11:01,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 03:11:01,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:11:01,786 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:11:01,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:11:01,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1050807926, now seen corresponding path program 1 times [2023-09-01 03:11:01,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:11:01,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [681157767] [2023-09-01 03:11:01,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:11:01,787 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:11:01,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:11:01,788 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:11:01,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 03:11:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:11:01,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 03:11:01,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:11:01,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:11:01,957 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-09-01 03:11:01,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-09-01 03:11:02,346 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-09-01 03:11:02,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2023-09-01 03:11:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:11:02,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:11:02,478 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:11:02,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [681157767] [2023-09-01 03:11:02,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [681157767] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:11:02,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:11:02,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:11:02,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069743964] [2023-09-01 03:11:02,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:11:02,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:11:02,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:11:02,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:11:02,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:11:02,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 423 [2023-09-01 03:11:02,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 290 flow. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 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) [2023-09-01 03:11:02,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:11:02,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 423 [2023-09-01 03:11:02,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:11:04,070 INFO L130 PetriNetUnfolder]: 11643/14617 cut-off events. [2023-09-01 03:11:04,070 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2023-09-01 03:11:04,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29318 conditions, 14617 events. 11643/14617 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 1404. Compared 70593 event pairs, 5630 based on Foata normal form. 0/3033 useless extension candidates. Maximal degree in co-relation 29302. Up to 14505 conditions per place. [2023-09-01 03:11:04,146 INFO L137 encePairwiseOnDemand]: 420/423 looper letters, 61 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2023-09-01 03:11:04,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 65 transitions, 390 flow [2023-09-01 03:11:04,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:11:04,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:11:04,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 568 transitions. [2023-09-01 03:11:04,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44759653270291566 [2023-09-01 03:11:04,149 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 568 transitions. [2023-09-01 03:11:04,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 568 transitions. [2023-09-01 03:11:04,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:11:04,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 568 transitions. [2023-09-01 03:11:04,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:04,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:04,153 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:04,153 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 290 flow. Second operand 3 states and 568 transitions. [2023-09-01 03:11:04,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 65 transitions, 390 flow [2023-09-01 03:11:04,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 372 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 03:11:04,155 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 250 flow [2023-09-01 03:11:04,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2023-09-01 03:11:04,156 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2023-09-01 03:11:04,156 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 250 flow [2023-09-01 03:11:04,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 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) [2023-09-01 03:11:04,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:11:04,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:11:04,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 03:11:04,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:11:04,365 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:11:04,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:11:04,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1050807927, now seen corresponding path program 1 times [2023-09-01 03:11:04,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:11:04,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227927941] [2023-09-01 03:11:04,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:11:04,366 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:11:04,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:11:04,367 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:11:04,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 03:11:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:11:04,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 03:11:04,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:11:04,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:11:04,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:11:04,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:11:04,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:11:04,560 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2023-09-01 03:11:04,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 31 [2023-09-01 03:11:04,584 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 03:11:04,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-09-01 03:11:04,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:11:04,831 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2023-09-01 03:11:04,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2023-09-01 03:11:04,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:11:04,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:11:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:11:05,153 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:11:05,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227927941] [2023-09-01 03:11:05,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227927941] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:11:05,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:11:05,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:11:05,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112694146] [2023-09-01 03:11:05,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:11:05,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:11:05,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:11:05,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:11:05,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:11:07,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 423 [2023-09-01 03:11:07,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 250 flow. Second operand has 8 states, 8 states have (on average 157.25) internal successors, (1258), 8 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:07,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:11:07,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 423 [2023-09-01 03:11:07,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:11:13,863 INFO L130 PetriNetUnfolder]: 24555/31403 cut-off events. [2023-09-01 03:11:13,863 INFO L131 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2023-09-01 03:11:13,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62928 conditions, 31403 events. 24555/31403 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 2059. Compared 172480 event pairs, 11877 based on Foata normal form. 0/7857 useless extension candidates. Maximal degree in co-relation 62913. Up to 10341 conditions per place. [2023-09-01 03:11:14,005 INFO L137 encePairwiseOnDemand]: 414/423 looper letters, 203 selfloop transitions, 30 changer transitions 0/236 dead transitions. [2023-09-01 03:11:14,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 236 transitions, 1180 flow [2023-09-01 03:11:14,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 03:11:14,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 03:11:14,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2728 transitions. [2023-09-01 03:11:14,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4030732860520095 [2023-09-01 03:11:14,016 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2728 transitions. [2023-09-01 03:11:14,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2728 transitions. [2023-09-01 03:11:14,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:11:14,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2728 transitions. [2023-09-01 03:11:14,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 170.5) internal successors, (2728), 16 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:14,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 423.0) internal successors, (7191), 17 states have internal predecessors, (7191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:14,031 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 423.0) internal successors, (7191), 17 states have internal predecessors, (7191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:14,031 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 250 flow. Second operand 16 states and 2728 transitions. [2023-09-01 03:11:14,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 236 transitions, 1180 flow [2023-09-01 03:11:14,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 236 transitions, 1179 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:11:14,035 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 440 flow [2023-09-01 03:11:14,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=440, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2023-09-01 03:11:14,038 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 18 predicate places. [2023-09-01 03:11:14,038 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 440 flow [2023-09-01 03:11:14,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 157.25) internal successors, (1258), 8 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:14,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:11:14,039 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 03:11:14,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 03:11:14,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:11:14,249 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:11:14,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:11:14,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1785490471, now seen corresponding path program 2 times [2023-09-01 03:11:14,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:11:14,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837546659] [2023-09-01 03:11:14,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:11:14,252 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:11:14,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:11:14,253 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:11:14,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 03:11:14,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:11:14,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:11:14,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 03:11:14,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:11:14,403 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:11:14,403 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:11:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:11:14,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:11:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:11:14,902 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:11:14,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837546659] [2023-09-01 03:11:14,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837546659] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:11:14,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:11:14,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:11:14,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531401782] [2023-09-01 03:11:14,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:11:14,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:11:14,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:11:14,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:11:14,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:11:18,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 423 [2023-09-01 03:11:18,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 440 flow. Second operand has 12 states, 12 states have (on average 163.0) internal successors, (1956), 12 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:18,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:11:18,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 423 [2023-09-01 03:11:18,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:11:21,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:11:23,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:11:24,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:11:26,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:11:28,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:11:29,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:11:32,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:11:34,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:11:48,429 INFO L130 PetriNetUnfolder]: 77737/99406 cut-off events. [2023-09-01 03:11:48,429 INFO L131 PetriNetUnfolder]: For 367/367 co-relation queries the response was YES. [2023-09-01 03:11:48,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199164 conditions, 99406 events. 77737/99406 cut-off events. For 367/367 co-relation queries the response was YES. Maximal size of possible extension queue 4691. Compared 600784 event pairs, 37610 based on Foata normal form. 15/24872 useless extension candidates. Maximal degree in co-relation 199146. Up to 15554 conditions per place. [2023-09-01 03:11:49,163 INFO L137 encePairwiseOnDemand]: 415/423 looper letters, 381 selfloop transitions, 53 changer transitions 0/437 dead transitions. [2023-09-01 03:11:49,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 437 transitions, 2413 flow [2023-09-01 03:11:49,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 03:11:49,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 03:11:49,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3001 transitions. [2023-09-01 03:11:49,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434101654846336 [2023-09-01 03:11:49,173 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3001 transitions. [2023-09-01 03:11:49,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3001 transitions. [2023-09-01 03:11:49,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:11:49,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3001 transitions. [2023-09-01 03:11:49,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 187.5625) internal successors, (3001), 16 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:49,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 423.0) internal successors, (7191), 17 states have internal predecessors, (7191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:49,192 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 423.0) internal successors, (7191), 17 states have internal predecessors, (7191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:49,193 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 440 flow. Second operand 16 states and 3001 transitions. [2023-09-01 03:11:49,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 437 transitions, 2413 flow [2023-09-01 03:11:49,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 437 transitions, 2357 flow, removed 28 selfloop flow, removed 0 redundant places. [2023-09-01 03:11:49,207 INFO L231 Difference]: Finished difference. Result has 99 places, 122 transitions, 927 flow [2023-09-01 03:11:49,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=927, PETRI_PLACES=99, PETRI_TRANSITIONS=122} [2023-09-01 03:11:49,208 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 39 predicate places. [2023-09-01 03:11:49,208 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 122 transitions, 927 flow [2023-09-01 03:11:49,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.0) internal successors, (1956), 12 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:49,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:11:49,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:11:49,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 03:11:49,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:11:49,418 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:11:49,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:11:49,418 INFO L85 PathProgramCache]: Analyzing trace with hash 509131622, now seen corresponding path program 1 times [2023-09-01 03:11:49,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:11:49,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637508601] [2023-09-01 03:11:49,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:11:49,419 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:11:49,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:11:49,420 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:11:49,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 03:11:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:11:49,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 26 conjunts are in the unsatisfiable core [2023-09-01 03:11:49,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:11:49,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:11:49,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:11:49,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:11:49,609 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:11:49,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 34 [2023-09-01 03:11:49,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 03:11:49,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:11:49,753 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2023-09-01 03:11:49,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2023-09-01 03:11:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:11:49,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:11:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:11:50,128 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:11:50,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637508601] [2023-09-01 03:11:50,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637508601] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:11:50,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:11:50,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:11:50,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003552549] [2023-09-01 03:11:50,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:11:50,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:11:50,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:11:50,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:11:50,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:11:51,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 423 [2023-09-01 03:11:51,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 122 transitions, 927 flow. Second operand has 8 states, 8 states have (on average 157.75) internal successors, (1262), 8 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:51,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:11:51,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 423 [2023-09-01 03:11:51,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:12:03,863 INFO L130 PetriNetUnfolder]: 74543/95331 cut-off events. [2023-09-01 03:12:03,863 INFO L131 PetriNetUnfolder]: For 384/384 co-relation queries the response was YES. [2023-09-01 03:12:04,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191137 conditions, 95331 events. 74543/95331 cut-off events. For 384/384 co-relation queries the response was YES. Maximal size of possible extension queue 4375. Compared 572437 event pairs, 35993 based on Foata normal form. 0/24494 useless extension candidates. Maximal degree in co-relation 191111. Up to 44420 conditions per place. [2023-09-01 03:12:04,522 INFO L137 encePairwiseOnDemand]: 412/423 looper letters, 226 selfloop transitions, 61 changer transitions 0/290 dead transitions. [2023-09-01 03:12:04,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 290 transitions, 1973 flow [2023-09-01 03:12:04,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 03:12:04,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 03:12:04,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2727 transitions. [2023-09-01 03:12:04,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4029255319148936 [2023-09-01 03:12:04,529 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2727 transitions. [2023-09-01 03:12:04,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2727 transitions. [2023-09-01 03:12:04,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:12:04,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2727 transitions. [2023-09-01 03:12:04,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 170.4375) internal successors, (2727), 16 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:04,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 423.0) internal successors, (7191), 17 states have internal predecessors, (7191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:04,542 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 423.0) internal successors, (7191), 17 states have internal predecessors, (7191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:04,542 INFO L175 Difference]: Start difference. First operand has 99 places, 122 transitions, 927 flow. Second operand 16 states and 2727 transitions. [2023-09-01 03:12:04,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 290 transitions, 1973 flow [2023-09-01 03:12:04,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 290 transitions, 1839 flow, removed 30 selfloop flow, removed 4 redundant places. [2023-09-01 03:12:04,549 INFO L231 Difference]: Finished difference. Result has 115 places, 122 transitions, 1004 flow [2023-09-01 03:12:04,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1004, PETRI_PLACES=115, PETRI_TRANSITIONS=122} [2023-09-01 03:12:04,550 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 55 predicate places. [2023-09-01 03:12:04,550 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 122 transitions, 1004 flow [2023-09-01 03:12:04,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 157.75) internal successors, (1262), 8 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:04,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:12:04,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:12:04,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-09-01 03:12:04,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:12:04,759 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:12:04,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:12:04,760 INFO L85 PathProgramCache]: Analyzing trace with hash 509131621, now seen corresponding path program 1 times [2023-09-01 03:12:04,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:12:04,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328667625] [2023-09-01 03:12:04,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:12:04,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:12:04,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:12:04,761 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:12:04,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 03:12:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:12:04,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 03:12:04,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:12:04,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:12:04,933 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-09-01 03:12:04,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-09-01 03:12:05,210 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-09-01 03:12:05,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-09-01 03:12:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:12:05,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:12:05,342 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:12:05,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328667625] [2023-09-01 03:12:05,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328667625] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:12:05,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:12:05,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:12:05,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65581190] [2023-09-01 03:12:05,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:12:05,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:12:05,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:12:05,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:12:05,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:12:05,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 423 [2023-09-01 03:12:05,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 122 transitions, 1004 flow. Second operand has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:05,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:12:05,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 423 [2023-09-01 03:12:05,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:12:15,398 INFO L130 PetriNetUnfolder]: 71306/90974 cut-off events. [2023-09-01 03:12:15,398 INFO L131 PetriNetUnfolder]: For 1721/1721 co-relation queries the response was YES. [2023-09-01 03:12:15,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182924 conditions, 90974 events. 71306/90974 cut-off events. For 1721/1721 co-relation queries the response was YES. Maximal size of possible extension queue 4266. Compared 543838 event pairs, 34321 based on Foata normal form. 162/23262 useless extension candidates. Maximal degree in co-relation 182891. Up to 89902 conditions per place. [2023-09-01 03:12:16,110 INFO L137 encePairwiseOnDemand]: 420/423 looper letters, 116 selfloop transitions, 1 changer transitions 0/120 dead transitions. [2023-09-01 03:12:16,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 120 transitions, 1234 flow [2023-09-01 03:12:16,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:12:16,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:12:16,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 564 transitions. [2023-09-01 03:12:16,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-09-01 03:12:16,122 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 564 transitions. [2023-09-01 03:12:16,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 564 transitions. [2023-09-01 03:12:16,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:12:16,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 564 transitions. [2023-09-01 03:12:16,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:16,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:16,134 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:16,135 INFO L175 Difference]: Start difference. First operand has 115 places, 122 transitions, 1004 flow. Second operand 3 states and 564 transitions. [2023-09-01 03:12:16,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 120 transitions, 1234 flow [2023-09-01 03:12:16,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 120 transitions, 1149 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-09-01 03:12:16,143 INFO L231 Difference]: Finished difference. Result has 104 places, 120 transitions, 917 flow [2023-09-01 03:12:16,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=915, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=917, PETRI_PLACES=104, PETRI_TRANSITIONS=120} [2023-09-01 03:12:16,144 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 44 predicate places. [2023-09-01 03:12:16,145 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 120 transitions, 917 flow [2023-09-01 03:12:16,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:16,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:12:16,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:12:16,156 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 [2023-09-01 03:12:16,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:12:16,355 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:12:16,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:12:16,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1396794701, now seen corresponding path program 1 times [2023-09-01 03:12:16,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:12:16,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216630348] [2023-09-01 03:12:16,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:12:16,356 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:12:16,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:12:16,357 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:12:16,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 03:12:16,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:12:16,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:12:16,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:12:16,553 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:12:16,554 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:12:16,633 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:12:16,633 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:12:16,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:12:16,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 03:12:16,738 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 03:12:16,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 03:12:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:12:16,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:12:21,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:12:21,131 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:12:21,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216630348] [2023-09-01 03:12:21,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216630348] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:12:21,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:12:21,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 03:12:21,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382822347] [2023-09-01 03:12:21,131 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:12:21,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:12:21,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:12:21,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:12:21,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:12:23,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 423 [2023-09-01 03:12:23,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 120 transitions, 917 flow. Second operand has 10 states, 10 states have (on average 151.6) internal successors, (1516), 10 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:23,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:12:23,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 423 [2023-09-01 03:12:23,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:12:55,382 INFO L130 PetriNetUnfolder]: 131082/170406 cut-off events. [2023-09-01 03:12:55,383 INFO L131 PetriNetUnfolder]: For 2342/2342 co-relation queries the response was YES. [2023-09-01 03:12:56,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342981 conditions, 170406 events. 131082/170406 cut-off events. For 2342/2342 co-relation queries the response was YES. Maximal size of possible extension queue 8210. Compared 1144683 event pairs, 36264 based on Foata normal form. 0/49310 useless extension candidates. Maximal degree in co-relation 342948. Up to 22194 conditions per place. [2023-09-01 03:12:56,852 INFO L137 encePairwiseOnDemand]: 410/423 looper letters, 633 selfloop transitions, 93 changer transitions 0/728 dead transitions. [2023-09-01 03:12:56,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 728 transitions, 3873 flow [2023-09-01 03:12:56,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 03:12:56,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 03:12:56,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5328 transitions. [2023-09-01 03:12:56,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40631434454358273 [2023-09-01 03:12:56,864 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5328 transitions. [2023-09-01 03:12:56,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5328 transitions. [2023-09-01 03:12:56,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:12:56,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5328 transitions. [2023-09-01 03:12:56,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 171.8709677419355) internal successors, (5328), 31 states have internal predecessors, (5328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:56,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 423.0) internal successors, (13536), 32 states have internal predecessors, (13536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:56,894 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 423.0) internal successors, (13536), 32 states have internal predecessors, (13536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:56,894 INFO L175 Difference]: Start difference. First operand has 104 places, 120 transitions, 917 flow. Second operand 31 states and 5328 transitions. [2023-09-01 03:12:56,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 728 transitions, 3873 flow [2023-09-01 03:12:56,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 728 transitions, 3872 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:12:56,910 INFO L231 Difference]: Finished difference. Result has 139 places, 164 transitions, 1276 flow [2023-09-01 03:12:56,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1276, PETRI_PLACES=139, PETRI_TRANSITIONS=164} [2023-09-01 03:12:56,911 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 79 predicate places. [2023-09-01 03:12:56,911 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 164 transitions, 1276 flow [2023-09-01 03:12:56,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 151.6) internal successors, (1516), 10 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:56,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:12:56,912 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-09-01 03:12:56,940 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 [2023-09-01 03:12:57,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:12:57,125 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:12:57,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:12:57,125 INFO L85 PathProgramCache]: Analyzing trace with hash 2130707981, now seen corresponding path program 2 times [2023-09-01 03:12:57,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:12:57,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508978793] [2023-09-01 03:12:57,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:12:57,126 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:12:57,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:12:57,128 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:12:57,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 03:12:57,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 03:12:57,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:12:57,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 03:12:57,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:12:57,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:12:57,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:12:57,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:12:57,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:12:57,321 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-09-01 03:12:57,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-09-01 03:12:57,343 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 03:12:57,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-09-01 03:12:57,474 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-09-01 03:12:57,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 03:12:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 03:12:57,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:12:57,533 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:12:57,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508978793] [2023-09-01 03:12:57,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1508978793] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:12:57,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:12:57,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:12:57,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290831106] [2023-09-01 03:12:57,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:12:57,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:12:57,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:12:57,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:12:57,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:12:59,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 03:13:01,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 03:13:03,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 03:13:03,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 423 [2023-09-01 03:13:03,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 164 transitions, 1276 flow. Second operand has 4 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:03,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:13:03,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 423 [2023-09-01 03:13:03,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:13:22,044 INFO L130 PetriNetUnfolder]: 121775/158804 cut-off events. [2023-09-01 03:13:22,044 INFO L131 PetriNetUnfolder]: For 134046/139357 co-relation queries the response was YES. [2023-09-01 03:13:23,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388200 conditions, 158804 events. 121775/158804 cut-off events. For 134046/139357 co-relation queries the response was YES. Maximal size of possible extension queue 7655. Compared 1080754 event pairs, 65883 based on Foata normal form. 4248/57155 useless extension candidates. Maximal degree in co-relation 388160. Up to 156985 conditions per place. [2023-09-01 03:13:23,888 INFO L137 encePairwiseOnDemand]: 420/423 looper letters, 133 selfloop transitions, 11 changer transitions 0/155 dead transitions. [2023-09-01 03:13:23,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 155 transitions, 1447 flow [2023-09-01 03:13:23,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:13:23,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:13:23,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 719 transitions. [2023-09-01 03:13:23,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42494089834515364 [2023-09-01 03:13:23,891 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 719 transitions. [2023-09-01 03:13:23,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 719 transitions. [2023-09-01 03:13:23,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:13:23,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 719 transitions. [2023-09-01 03:13:23,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 179.75) internal successors, (719), 4 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:23,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:23,896 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:23,896 INFO L175 Difference]: Start difference. First operand has 139 places, 164 transitions, 1276 flow. Second operand 4 states and 719 transitions. [2023-09-01 03:13:23,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 155 transitions, 1447 flow [2023-09-01 03:13:24,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 155 transitions, 1335 flow, removed 12 selfloop flow, removed 9 redundant places. [2023-09-01 03:13:24,285 INFO L231 Difference]: Finished difference. Result has 131 places, 155 transitions, 1069 flow [2023-09-01 03:13:24,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1047, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1069, PETRI_PLACES=131, PETRI_TRANSITIONS=155} [2023-09-01 03:13:24,286 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 71 predicate places. [2023-09-01 03:13:24,286 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 155 transitions, 1069 flow [2023-09-01 03:13:24,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:24,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:13:24,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:13:24,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 03:13:24,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:13:24,488 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:13:24,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:13:24,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1396794702, now seen corresponding path program 1 times [2023-09-01 03:13:24,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:13:24,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305931218] [2023-09-01 03:13:24,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:13:24,489 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:13:24,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:13:24,490 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:13:24,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 03:13:24,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:13:24,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:13:24,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:13:24,670 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:13:24,671 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:13:24,704 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 03:13:24,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 03:13:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:13:24,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:13:24,719 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:13:24,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305931218] [2023-09-01 03:13:24,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305931218] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:13:24,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:13:24,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:13:24,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56002518] [2023-09-01 03:13:24,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:13:24,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:13:24,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:13:24,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:13:24,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:13:24,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 423 [2023-09-01 03:13:24,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 155 transitions, 1069 flow. Second operand has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:24,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:13:24,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 423 [2023-09-01 03:13:24,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:13:36,936 INFO L130 PetriNetUnfolder]: 75581/99551 cut-off events. [2023-09-01 03:13:36,936 INFO L131 PetriNetUnfolder]: For 101065/105071 co-relation queries the response was YES. [2023-09-01 03:13:37,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252807 conditions, 99551 events. 75581/99551 cut-off events. For 101065/105071 co-relation queries the response was YES. Maximal size of possible extension queue 4796. Compared 661567 event pairs, 40056 based on Foata normal form. 3204/41084 useless extension candidates. Maximal degree in co-relation 252770. Up to 98260 conditions per place. [2023-09-01 03:13:37,973 INFO L137 encePairwiseOnDemand]: 418/423 looper letters, 130 selfloop transitions, 11 changer transitions 0/152 dead transitions. [2023-09-01 03:13:37,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 152 transitions, 1345 flow [2023-09-01 03:13:37,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:13:37,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:13:37,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 702 transitions. [2023-09-01 03:13:37,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148936170212766 [2023-09-01 03:13:37,975 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 702 transitions. [2023-09-01 03:13:37,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 702 transitions. [2023-09-01 03:13:37,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:13:37,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 702 transitions. [2023-09-01 03:13:37,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 175.5) internal successors, (702), 4 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:37,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:37,977 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:37,978 INFO L175 Difference]: Start difference. First operand has 131 places, 155 transitions, 1069 flow. Second operand 4 states and 702 transitions. [2023-09-01 03:13:37,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 152 transitions, 1345 flow [2023-09-01 03:13:38,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 152 transitions, 1333 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:13:38,188 INFO L231 Difference]: Finished difference. Result has 129 places, 152 transitions, 1073 flow [2023-09-01 03:13:38,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1073, PETRI_PLACES=129, PETRI_TRANSITIONS=152} [2023-09-01 03:13:38,189 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 69 predicate places. [2023-09-01 03:13:38,189 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 152 transitions, 1073 flow [2023-09-01 03:13:38,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:38,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:13:38,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:13:38,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-09-01 03:13:38,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:13:38,401 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:13:38,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:13:38,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1396794699, now seen corresponding path program 1 times [2023-09-01 03:13:38,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:13:38,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078913853] [2023-09-01 03:13:38,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:13:38,402 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:13:38,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:13:38,403 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:13:38,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 03:13:38,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:13:38,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:13:38,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:13:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:13:38,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:13:38,653 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 25 treesize of output 21 [2023-09-01 03:13:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:13:38,701 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:13:38,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078913853] [2023-09-01 03:13:38,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078913853] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:13:38,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:13:38,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 03:13:38,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106079948] [2023-09-01 03:13:38,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:13:38,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:13:38,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:13:38,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:13:38,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:13:40,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 423 [2023-09-01 03:13:40,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 152 transitions, 1073 flow. Second operand has 10 states, 10 states have (on average 163.4) internal successors, (1634), 10 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:40,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:13:40,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 423 [2023-09-01 03:13:40,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:13:56,631 INFO L130 PetriNetUnfolder]: 96197/126359 cut-off events. [2023-09-01 03:13:56,632 INFO L131 PetriNetUnfolder]: For 63740/63740 co-relation queries the response was YES. [2023-09-01 03:13:57,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309694 conditions, 126359 events. 96197/126359 cut-off events. For 63740/63740 co-relation queries the response was YES. Maximal size of possible extension queue 5802. Compared 851398 event pairs, 31503 based on Foata normal form. 0/49868 useless extension candidates. Maximal degree in co-relation 309657. Up to 67781 conditions per place. [2023-09-01 03:13:57,920 INFO L137 encePairwiseOnDemand]: 415/423 looper letters, 173 selfloop transitions, 66 changer transitions 0/241 dead transitions. [2023-09-01 03:13:57,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 241 transitions, 1869 flow [2023-09-01 03:13:57,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 03:13:57,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 03:13:57,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1599 transitions. [2023-09-01 03:13:57,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42001576044129235 [2023-09-01 03:13:57,924 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1599 transitions. [2023-09-01 03:13:57,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1599 transitions. [2023-09-01 03:13:57,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:13:57,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1599 transitions. [2023-09-01 03:13:57,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 177.66666666666666) internal successors, (1599), 9 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:57,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 423.0) internal successors, (4230), 10 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:57,929 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 423.0) internal successors, (4230), 10 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:57,930 INFO L175 Difference]: Start difference. First operand has 129 places, 152 transitions, 1073 flow. Second operand 9 states and 1599 transitions. [2023-09-01 03:13:57,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 241 transitions, 1869 flow [2023-09-01 03:13:58,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 241 transitions, 1857 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:13:58,373 INFO L231 Difference]: Finished difference. Result has 137 places, 149 transitions, 1236 flow [2023-09-01 03:13:58,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1236, PETRI_PLACES=137, PETRI_TRANSITIONS=149} [2023-09-01 03:13:58,374 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 77 predicate places. [2023-09-01 03:13:58,374 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 149 transitions, 1236 flow [2023-09-01 03:13:58,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.4) internal successors, (1634), 10 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:58,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:13:58,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:13:58,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 03:13:58,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:13:58,582 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:13:58,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:13:58,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1396794700, now seen corresponding path program 1 times [2023-09-01 03:13:58,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:13:58,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840683802] [2023-09-01 03:13:58,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:13:58,583 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:13:58,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:13:58,585 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:13:58,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 03:13:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:13:58,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 03:13:58,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:13:58,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 03:13:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:13:58,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:13:58,686 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:13:58,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840683802] [2023-09-01 03:13:58,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840683802] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:13:58,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:13:58,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:13:58,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538793778] [2023-09-01 03:13:58,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:13:58,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:13:58,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:13:58,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:13:58,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:13:58,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 423 [2023-09-01 03:13:58,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 149 transitions, 1236 flow. Second operand has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 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) [2023-09-01 03:13:58,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:13:58,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 423 [2023-09-01 03:13:58,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:14:06,888 INFO L130 PetriNetUnfolder]: 45415/61789 cut-off events. [2023-09-01 03:14:06,888 INFO L131 PetriNetUnfolder]: For 224007/230927 co-relation queries the response was YES. [2023-09-01 03:14:07,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165479 conditions, 61789 events. 45415/61789 cut-off events. For 224007/230927 co-relation queries the response was YES. Maximal size of possible extension queue 3026. Compared 418486 event pairs, 25200 based on Foata normal form. 8126/38149 useless extension candidates. Maximal degree in co-relation 165440. Up to 60828 conditions per place. [2023-09-01 03:14:07,520 INFO L137 encePairwiseOnDemand]: 418/423 looper letters, 90 selfloop transitions, 31 changer transitions 0/132 dead transitions. [2023-09-01 03:14:07,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 132 transitions, 1411 flow [2023-09-01 03:14:07,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:14:07,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:14:07,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 711 transitions. [2023-09-01 03:14:07,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42021276595744683 [2023-09-01 03:14:07,522 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 711 transitions. [2023-09-01 03:14:07,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 711 transitions. [2023-09-01 03:14:07,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:14:07,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 711 transitions. [2023-09-01 03:14:07,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:07,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:07,524 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:07,524 INFO L175 Difference]: Start difference. First operand has 137 places, 149 transitions, 1236 flow. Second operand 4 states and 711 transitions. [2023-09-01 03:14:07,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 132 transitions, 1411 flow [2023-09-01 03:14:07,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 132 transitions, 1368 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-09-01 03:14:07,722 INFO L231 Difference]: Finished difference. Result has 134 places, 132 transitions, 1188 flow [2023-09-01 03:14:07,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1126, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1188, PETRI_PLACES=134, PETRI_TRANSITIONS=132} [2023-09-01 03:14:07,722 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 74 predicate places. [2023-09-01 03:14:07,723 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 132 transitions, 1188 flow [2023-09-01 03:14:07,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 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) [2023-09-01 03:14:07,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:14:07,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:14:07,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-09-01 03:14:07,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:14:07,924 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:14:07,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:14:07,924 INFO L85 PathProgramCache]: Analyzing trace with hash -350958929, now seen corresponding path program 1 times [2023-09-01 03:14:07,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:14:07,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299350221] [2023-09-01 03:14:07,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:14:07,925 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:14:07,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:14:07,926 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:14:07,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 03:14:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:14:08,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 03:14:08,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:14:08,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:14:08,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:14:08,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:14:08,237 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:14:08,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [299350221] [2023-09-01 03:14:08,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [299350221] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:14:08,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:14:08,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:14:08,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295661732] [2023-09-01 03:14:08,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:14:08,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:14:08,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:14:08,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:14:08,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:14:09,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 423 [2023-09-01 03:14:09,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 132 transitions, 1188 flow. Second operand has 12 states, 12 states have (on average 164.5) internal successors, (1974), 12 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:09,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:14:09,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 423 [2023-09-01 03:14:09,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:14:16,390 INFO L130 PetriNetUnfolder]: 36454/48682 cut-off events. [2023-09-01 03:14:16,390 INFO L131 PetriNetUnfolder]: For 77001/77001 co-relation queries the response was YES. [2023-09-01 03:14:16,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130457 conditions, 48682 events. 36454/48682 cut-off events. For 77001/77001 co-relation queries the response was YES. Maximal size of possible extension queue 2213. Compared 304501 event pairs, 11128 based on Foata normal form. 869/24828 useless extension candidates. Maximal degree in co-relation 130419. Up to 25524 conditions per place. [2023-09-01 03:14:16,761 INFO L137 encePairwiseOnDemand]: 411/423 looper letters, 139 selfloop transitions, 48 changer transitions 0/189 dead transitions. [2023-09-01 03:14:16,761 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 189 transitions, 1583 flow [2023-09-01 03:14:16,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 03:14:16,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 03:14:16,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1920 transitions. [2023-09-01 03:14:16,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126370083816892 [2023-09-01 03:14:16,764 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1920 transitions. [2023-09-01 03:14:16,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1920 transitions. [2023-09-01 03:14:16,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:14:16,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1920 transitions. [2023-09-01 03:14:16,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 174.54545454545453) internal successors, (1920), 11 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:16,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 423.0) internal successors, (5076), 12 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:16,769 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 423.0) internal successors, (5076), 12 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:16,769 INFO L175 Difference]: Start difference. First operand has 134 places, 132 transitions, 1188 flow. Second operand 11 states and 1920 transitions. [2023-09-01 03:14:16,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 189 transitions, 1583 flow [2023-09-01 03:14:17,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 189 transitions, 1516 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-09-01 03:14:17,499 INFO L231 Difference]: Finished difference. Result has 128 places, 111 transitions, 1050 flow [2023-09-01 03:14:17,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1050, PETRI_PLACES=128, PETRI_TRANSITIONS=111} [2023-09-01 03:14:17,500 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 68 predicate places. [2023-09-01 03:14:17,500 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 111 transitions, 1050 flow [2023-09-01 03:14:17,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 164.5) internal successors, (1974), 12 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:17,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:14:17,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:14:17,511 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 [2023-09-01 03:14:17,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:14:17,705 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:14:17,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:14:17,706 INFO L85 PathProgramCache]: Analyzing trace with hash -350754530, now seen corresponding path program 1 times [2023-09-01 03:14:17,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:14:17,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533611000] [2023-09-01 03:14:17,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:14:17,706 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:14:17,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:14:17,707 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:14:17,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 03:14:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:14:17,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:14:17,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:14:17,865 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-09-01 03:14:17,865 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 33 treesize of output 44 [2023-09-01 03:14:17,892 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 03:14:17,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 03:14:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:14:17,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:14:17,904 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:14:17,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533611000] [2023-09-01 03:14:17,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533611000] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:14:17,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:14:17,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:14:17,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821492114] [2023-09-01 03:14:17,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:14:17,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:14:17,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:14:17,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:14:17,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:14:17,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 423 [2023-09-01 03:14:17,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 111 transitions, 1050 flow. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 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) [2023-09-01 03:14:17,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:14:17,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 423 [2023-09-01 03:14:17,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:14:23,578 INFO L130 PetriNetUnfolder]: 28771/38896 cut-off events. [2023-09-01 03:14:23,578 INFO L131 PetriNetUnfolder]: For 105228/109130 co-relation queries the response was YES. [2023-09-01 03:14:23,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105229 conditions, 38896 events. 28771/38896 cut-off events. For 105228/109130 co-relation queries the response was YES. Maximal size of possible extension queue 1903. Compared 247283 event pairs, 15841 based on Foata normal form. 3430/22462 useless extension candidates. Maximal degree in co-relation 105192. Up to 38395 conditions per place. [2023-09-01 03:14:24,023 INFO L137 encePairwiseOnDemand]: 420/423 looper letters, 99 selfloop transitions, 1 changer transitions 0/109 dead transitions. [2023-09-01 03:14:24,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 109 transitions, 1246 flow [2023-09-01 03:14:24,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:14:24,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:14:24,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 549 transitions. [2023-09-01 03:14:24,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326241134751773 [2023-09-01 03:14:24,024 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 549 transitions. [2023-09-01 03:14:24,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 549 transitions. [2023-09-01 03:14:24,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:14:24,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 549 transitions. [2023-09-01 03:14:24,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:24,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:24,029 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:24,029 INFO L175 Difference]: Start difference. First operand has 128 places, 111 transitions, 1050 flow. Second operand 3 states and 549 transitions. [2023-09-01 03:14:24,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 109 transitions, 1246 flow [2023-09-01 03:14:24,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 109 transitions, 1225 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 03:14:24,078 INFO L231 Difference]: Finished difference. Result has 125 places, 109 transitions, 1027 flow [2023-09-01 03:14:24,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1027, PETRI_PLACES=125, PETRI_TRANSITIONS=109} [2023-09-01 03:14:24,079 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 65 predicate places. [2023-09-01 03:14:24,079 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 109 transitions, 1027 flow [2023-09-01 03:14:24,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 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) [2023-09-01 03:14:24,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:14:24,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:14:24,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-09-01 03:14:24,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:14:24,281 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:14:24,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:14:24,281 INFO L85 PathProgramCache]: Analyzing trace with hash -350754531, now seen corresponding path program 1 times [2023-09-01 03:14:24,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:14:24,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [422926453] [2023-09-01 03:14:24,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:14:24,282 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:14:24,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:14:24,283 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:14:24,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 03:14:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:14:24,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:14:24,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:14:24,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:14:24,496 INFO L321 Elim1Store]: treesize reduction 66, result has 29.8 percent of original size [2023-09-01 03:14:24,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 40 [2023-09-01 03:14:24,509 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 167 treesize of output 163 [2023-09-01 03:14:24,657 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2023-09-01 03:14:24,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2023-09-01 03:14:24,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:14:24,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:14:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:14:25,138 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:14:25,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [422926453] [2023-09-01 03:14:25,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [422926453] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:14:25,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:14:25,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:14:25,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892505445] [2023-09-01 03:14:25,138 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:14:25,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:14:25,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:14:25,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:14:25,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:14:28,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 03:14:29,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 423 [2023-09-01 03:14:29,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 109 transitions, 1027 flow. Second operand has 8 states, 8 states have (on average 157.25) internal successors, (1258), 8 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:29,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:14:29,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 423 [2023-09-01 03:14:29,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:14:35,703 INFO L130 PetriNetUnfolder]: 26984/36644 cut-off events. [2023-09-01 03:14:35,703 INFO L131 PetriNetUnfolder]: For 100227/103933 co-relation queries the response was YES. [2023-09-01 03:14:35,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99582 conditions, 36644 events. 26984/36644 cut-off events. For 100227/103933 co-relation queries the response was YES. Maximal size of possible extension queue 1780. Compared 231971 event pairs, 14000 based on Foata normal form. 3232/22101 useless extension candidates. Maximal degree in co-relation 99544. Up to 31271 conditions per place. [2023-09-01 03:14:35,963 INFO L137 encePairwiseOnDemand]: 413/423 looper letters, 119 selfloop transitions, 44 changer transitions 0/172 dead transitions. [2023-09-01 03:14:35,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 172 transitions, 1600 flow [2023-09-01 03:14:35,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 03:14:35,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 03:14:35,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2285 transitions. [2023-09-01 03:14:35,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3858493752110773 [2023-09-01 03:14:35,966 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2285 transitions. [2023-09-01 03:14:35,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2285 transitions. [2023-09-01 03:14:35,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:14:35,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2285 transitions. [2023-09-01 03:14:35,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 163.21428571428572) internal successors, (2285), 14 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:35,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 423.0) internal successors, (6345), 15 states have internal predecessors, (6345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:35,971 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 423.0) internal successors, (6345), 15 states have internal predecessors, (6345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:35,972 INFO L175 Difference]: Start difference. First operand has 125 places, 109 transitions, 1027 flow. Second operand 14 states and 2285 transitions. [2023-09-01 03:14:35,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 172 transitions, 1600 flow [2023-09-01 03:14:36,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 172 transitions, 1599 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:14:36,012 INFO L231 Difference]: Finished difference. Result has 140 places, 109 transitions, 1159 flow [2023-09-01 03:14:36,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1159, PETRI_PLACES=140, PETRI_TRANSITIONS=109} [2023-09-01 03:14:36,013 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 80 predicate places. [2023-09-01 03:14:36,013 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 109 transitions, 1159 flow [2023-09-01 03:14:36,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 157.25) internal successors, (1258), 8 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:36,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:14:36,013 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-09-01 03:14:36,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 03:14:36,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:14:36,222 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:14:36,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:14:36,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1089002116, now seen corresponding path program 2 times [2023-09-01 03:14:36,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:14:36,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138829780] [2023-09-01 03:14:36,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:14:36,223 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:14:36,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:14:36,224 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:14:36,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 03:14:36,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 03:14:36,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:14:36,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:14:36,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:14:36,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:14:36,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:14:36,401 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-09-01 03:14:36,401 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 2 case distinctions, treesize of input 15 treesize of output 35 [2023-09-01 03:14:36,410 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 42 treesize of output 38 [2023-09-01 03:14:36,503 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-09-01 03:14:36,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 03:14:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 03:14:36,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:14:36,638 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:14:36,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138829780] [2023-09-01 03:14:36,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138829780] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:14:36,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:14:36,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:14:36,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242127886] [2023-09-01 03:14:36,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:14:36,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:14:36,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:14:36,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:14:36,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:14:38,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 03:14:39,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 423 [2023-09-01 03:14:39,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 109 transitions, 1159 flow. Second operand has 5 states, 5 states have (on average 169.4) internal successors, (847), 5 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:39,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:14:39,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 423 [2023-09-01 03:14:39,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:14:44,896 INFO L130 PetriNetUnfolder]: 27501/37101 cut-off events. [2023-09-01 03:14:44,897 INFO L131 PetriNetUnfolder]: For 101988/105678 co-relation queries the response was YES. [2023-09-01 03:14:45,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101690 conditions, 37101 events. 27501/37101 cut-off events. For 101988/105678 co-relation queries the response was YES. Maximal size of possible extension queue 1884. Compared 234049 event pairs, 15143 based on Foata normal form. 3278/21938 useless extension candidates. Maximal degree in co-relation 101647. Up to 36506 conditions per place. [2023-09-01 03:14:45,175 INFO L137 encePairwiseOnDemand]: 419/423 looper letters, 67 selfloop transitions, 32 changer transitions 0/108 dead transitions. [2023-09-01 03:14:45,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 108 transitions, 1349 flow [2023-09-01 03:14:45,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:14:45,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:14:45,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 873 transitions. [2023-09-01 03:14:45,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127659574468085 [2023-09-01 03:14:45,177 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 873 transitions. [2023-09-01 03:14:45,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 873 transitions. [2023-09-01 03:14:45,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:14:45,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 873 transitions. [2023-09-01 03:14:45,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 174.6) internal successors, (873), 5 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:45,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:45,179 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:45,179 INFO L175 Difference]: Start difference. First operand has 140 places, 109 transitions, 1159 flow. Second operand 5 states and 873 transitions. [2023-09-01 03:14:45,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 108 transitions, 1349 flow [2023-09-01 03:14:45,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 108 transitions, 1251 flow, removed 1 selfloop flow, removed 11 redundant places. [2023-09-01 03:14:45,224 INFO L231 Difference]: Finished difference. Result has 132 places, 108 transitions, 1117 flow [2023-09-01 03:14:45,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1053, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1117, PETRI_PLACES=132, PETRI_TRANSITIONS=108} [2023-09-01 03:14:45,225 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 72 predicate places. [2023-09-01 03:14:45,225 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 108 transitions, 1117 flow [2023-09-01 03:14:45,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.4) internal successors, (847), 5 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:45,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:14:45,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:14:45,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-09-01 03:14:45,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:14:45,428 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:14:45,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:14:45,428 INFO L85 PathProgramCache]: Analyzing trace with hash 2011505704, now seen corresponding path program 1 times [2023-09-01 03:14:45,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:14:45,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [954621034] [2023-09-01 03:14:45,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:14:45,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:14:45,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:14:45,430 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:14:45,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-09-01 03:14:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:14:45,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:14:45,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:14:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:14:45,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:14:45,758 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 25 treesize of output 21 [2023-09-01 03:14:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:14:45,818 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:14:45,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [954621034] [2023-09-01 03:14:45,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [954621034] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:14:45,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:14:45,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 03:14:45,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664368480] [2023-09-01 03:14:45,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:14:45,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:14:45,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:14:45,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:14:45,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:14:47,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 423 [2023-09-01 03:14:47,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 108 transitions, 1117 flow. Second operand has 10 states, 10 states have (on average 163.8) internal successors, (1638), 10 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:47,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:14:47,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 423 [2023-09-01 03:14:47,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:14:55,060 INFO L130 PetriNetUnfolder]: 39659/55001 cut-off events. [2023-09-01 03:14:55,060 INFO L131 PetriNetUnfolder]: For 175034/181450 co-relation queries the response was YES. [2023-09-01 03:14:55,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157259 conditions, 55001 events. 39659/55001 cut-off events. For 175034/181450 co-relation queries the response was YES. Maximal size of possible extension queue 2795. Compared 385514 event pairs, 15845 based on Foata normal form. 5598/37404 useless extension candidates. Maximal degree in co-relation 157219. Up to 30918 conditions per place. [2023-09-01 03:14:55,780 INFO L137 encePairwiseOnDemand]: 415/423 looper letters, 129 selfloop transitions, 43 changer transitions 0/180 dead transitions. [2023-09-01 03:14:55,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 180 transitions, 1756 flow [2023-09-01 03:14:55,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 03:14:55,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 03:14:55,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1563 transitions. [2023-09-01 03:14:55,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105594956658786 [2023-09-01 03:14:55,783 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1563 transitions. [2023-09-01 03:14:55,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1563 transitions. [2023-09-01 03:14:55,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:14:55,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1563 transitions. [2023-09-01 03:14:55,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 173.66666666666666) internal successors, (1563), 9 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:55,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 423.0) internal successors, (4230), 10 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:55,788 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 423.0) internal successors, (4230), 10 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:55,788 INFO L175 Difference]: Start difference. First operand has 132 places, 108 transitions, 1117 flow. Second operand 9 states and 1563 transitions. [2023-09-01 03:14:55,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 180 transitions, 1756 flow [2023-09-01 03:14:55,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 180 transitions, 1713 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 03:14:55,884 INFO L231 Difference]: Finished difference. Result has 139 places, 111 transitions, 1178 flow [2023-09-01 03:14:55,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1178, PETRI_PLACES=139, PETRI_TRANSITIONS=111} [2023-09-01 03:14:55,884 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 79 predicate places. [2023-09-01 03:14:55,884 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 111 transitions, 1178 flow [2023-09-01 03:14:55,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.8) internal successors, (1638), 10 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:55,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:14:55,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:14:55,895 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 (20)] Forceful destruction successful, exit code 0 [2023-09-01 03:14:56,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:14:56,093 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:14:56,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:14:56,094 INFO L85 PathProgramCache]: Analyzing trace with hash 2011505702, now seen corresponding path program 1 times [2023-09-01 03:14:56,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:14:56,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060555724] [2023-09-01 03:14:56,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:14:56,094 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 [2023-09-01 03:14:56,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:14:56,095 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:14:56,103 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 (21)] Waiting until timeout for monitored process [2023-09-01 03:14:56,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:14:56,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:14:56,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:14:56,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:14:56,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:14:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:14:56,430 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:14:56,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060555724] [2023-09-01 03:14:56,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060555724] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:14:56,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:14:56,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:14:56,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885322691] [2023-09-01 03:14:56,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:14:56,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:14:56,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:14:56,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:14:56,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:14:57,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 423 [2023-09-01 03:14:57,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 111 transitions, 1178 flow. Second operand has 12 states, 12 states have (on average 162.66666666666666) internal successors, (1952), 12 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:57,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:14:57,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 423 [2023-09-01 03:14:57,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:15:05,016 INFO L130 PetriNetUnfolder]: 35926/50482 cut-off events. [2023-09-01 03:15:05,016 INFO L131 PetriNetUnfolder]: For 170501/176159 co-relation queries the response was YES. [2023-09-01 03:15:05,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155858 conditions, 50482 events. 35926/50482 cut-off events. For 170501/176159 co-relation queries the response was YES. Maximal size of possible extension queue 2733. Compared 358110 event pairs, 17152 based on Foata normal form. 5014/37905 useless extension candidates. Maximal degree in co-relation 155816. Up to 34388 conditions per place. [2023-09-01 03:15:05,525 INFO L137 encePairwiseOnDemand]: 412/423 looper letters, 112 selfloop transitions, 44 changer transitions 0/164 dead transitions. [2023-09-01 03:15:05,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 164 transitions, 1740 flow [2023-09-01 03:15:05,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 03:15:05,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 03:15:05,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1861 transitions. [2023-09-01 03:15:05,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39995701697829356 [2023-09-01 03:15:05,529 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1861 transitions. [2023-09-01 03:15:05,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1861 transitions. [2023-09-01 03:15:05,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:15:05,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1861 transitions. [2023-09-01 03:15:05,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 169.1818181818182) internal successors, (1861), 11 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:05,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 423.0) internal successors, (5076), 12 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:05,536 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 423.0) internal successors, (5076), 12 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:05,536 INFO L175 Difference]: Start difference. First operand has 139 places, 111 transitions, 1178 flow. Second operand 11 states and 1861 transitions. [2023-09-01 03:15:05,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 164 transitions, 1740 flow [2023-09-01 03:15:05,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 164 transitions, 1683 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 03:15:05,697 INFO L231 Difference]: Finished difference. Result has 147 places, 111 transitions, 1230 flow [2023-09-01 03:15:05,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1230, PETRI_PLACES=147, PETRI_TRANSITIONS=111} [2023-09-01 03:15:05,697 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 87 predicate places. [2023-09-01 03:15:05,697 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 111 transitions, 1230 flow [2023-09-01 03:15:05,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 162.66666666666666) internal successors, (1952), 12 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:05,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:15:05,698 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:15:05,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-09-01 03:15:05,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:15:05,899 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:15:05,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:15:05,900 INFO L85 PathProgramCache]: Analyzing trace with hash 600666973, now seen corresponding path program 2 times [2023-09-01 03:15:05,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:15:05,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1704127230] [2023-09-01 03:15:05,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:15:05,900 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:15:05,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:15:05,901 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:15:05,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-09-01 03:15:05,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 03:15:05,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:15:05,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 03:15:05,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:15:06,258 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:15:06,258 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:15:06,352 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:15:06,352 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:15:06,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:15:06,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 03:15:06,448 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 03:15:06,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 03:15:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 03:15:06,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:15:06,527 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:15:06,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1704127230] [2023-09-01 03:15:06,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1704127230] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:15:06,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:15:06,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 03:15:06,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547453794] [2023-09-01 03:15:06,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:15:06,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:15:06,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:15:06,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:15:06,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:15:07,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 423 [2023-09-01 03:15:07,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 111 transitions, 1230 flow. Second operand has 6 states, 6 states have (on average 161.33333333333334) internal successors, (968), 6 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:07,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:15:07,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 423 [2023-09-01 03:15:07,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:15:12,977 INFO L130 PetriNetUnfolder]: 27706/38296 cut-off events. [2023-09-01 03:15:12,977 INFO L131 PetriNetUnfolder]: For 83676/85272 co-relation queries the response was YES. [2023-09-01 03:15:13,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128738 conditions, 38296 events. 27706/38296 cut-off events. For 83676/85272 co-relation queries the response was YES. Maximal size of possible extension queue 2070. Compared 255358 event pairs, 6466 based on Foata normal form. 3798/30793 useless extension candidates. Maximal degree in co-relation 128694. Up to 32436 conditions per place. [2023-09-01 03:15:13,407 INFO L137 encePairwiseOnDemand]: 416/423 looper letters, 99 selfloop transitions, 27 changer transitions 0/129 dead transitions. [2023-09-01 03:15:13,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 129 transitions, 1555 flow [2023-09-01 03:15:13,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:15:13,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:15:13,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1011 transitions. [2023-09-01 03:15:13,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983451536643026 [2023-09-01 03:15:13,410 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1011 transitions. [2023-09-01 03:15:13,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1011 transitions. [2023-09-01 03:15:13,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:15:13,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1011 transitions. [2023-09-01 03:15:13,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 168.5) internal successors, (1011), 6 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:13,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:13,414 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:13,414 INFO L175 Difference]: Start difference. First operand has 147 places, 111 transitions, 1230 flow. Second operand 6 states and 1011 transitions. [2023-09-01 03:15:13,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 129 transitions, 1555 flow [2023-09-01 03:15:13,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 129 transitions, 1463 flow, removed 9 selfloop flow, removed 7 redundant places. [2023-09-01 03:15:13,662 INFO L231 Difference]: Finished difference. Result has 146 places, 111 transitions, 1209 flow [2023-09-01 03:15:13,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1209, PETRI_PLACES=146, PETRI_TRANSITIONS=111} [2023-09-01 03:15:13,663 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 86 predicate places. [2023-09-01 03:15:13,663 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 111 transitions, 1209 flow [2023-09-01 03:15:13,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.33333333333334) internal successors, (968), 6 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:13,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:15:13,663 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:15:13,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-09-01 03:15:13,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:15:13,874 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:15:13,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:15:13,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1556034157, now seen corresponding path program 2 times [2023-09-01 03:15:13,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:15:13,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [265057135] [2023-09-01 03:15:13,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:15:13,875 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:15:13,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:15:13,875 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:15:13,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-09-01 03:15:14,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:15:14,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:15:14,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:15:14,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:15:14,105 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 03:15:14,105 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 03:15:14,177 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:15:14,178 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:15:14,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:15:14,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 03:15:14,247 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 03:15:14,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 03:15:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:15:14,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:15:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:15:14,880 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:15:14,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [265057135] [2023-09-01 03:15:14,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [265057135] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:15:14,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:15:14,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-09-01 03:15:14,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932457681] [2023-09-01 03:15:14,881 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:15:14,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 03:15:14,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:15:14,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 03:15:14,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-09-01 03:15:21,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 423 [2023-09-01 03:15:21,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 111 transitions, 1209 flow. Second operand has 14 states, 14 states have (on average 155.42857142857142) internal successors, (2176), 14 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:21,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:15:21,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 423 [2023-09-01 03:15:21,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:15:31,271 INFO L130 PetriNetUnfolder]: 42941/59330 cut-off events. [2023-09-01 03:15:31,271 INFO L131 PetriNetUnfolder]: For 126506/128894 co-relation queries the response was YES. [2023-09-01 03:15:31,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201353 conditions, 59330 events. 42941/59330 cut-off events. For 126506/128894 co-relation queries the response was YES. Maximal size of possible extension queue 3049. Compared 413856 event pairs, 5435 based on Foata normal form. 3820/45677 useless extension candidates. Maximal degree in co-relation 201308. Up to 25684 conditions per place. [2023-09-01 03:15:31,922 INFO L137 encePairwiseOnDemand]: 415/423 looper letters, 194 selfloop transitions, 34 changer transitions 0/231 dead transitions. [2023-09-01 03:15:31,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 231 transitions, 2097 flow [2023-09-01 03:15:31,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 03:15:31,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 03:15:31,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2156 transitions. [2023-09-01 03:15:31,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39207128568830696 [2023-09-01 03:15:31,925 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2156 transitions. [2023-09-01 03:15:31,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2156 transitions. [2023-09-01 03:15:31,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:15:31,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2156 transitions. [2023-09-01 03:15:31,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 165.84615384615384) internal successors, (2156), 13 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:31,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 423.0) internal successors, (5922), 14 states have internal predecessors, (5922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:31,930 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 423.0) internal successors, (5922), 14 states have internal predecessors, (5922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:31,930 INFO L175 Difference]: Start difference. First operand has 146 places, 111 transitions, 1209 flow. Second operand 13 states and 2156 transitions. [2023-09-01 03:15:31,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 231 transitions, 2097 flow [2023-09-01 03:15:32,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 231 transitions, 2054 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-09-01 03:15:32,067 INFO L231 Difference]: Finished difference. Result has 156 places, 116 transitions, 1299 flow [2023-09-01 03:15:32,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1166, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1299, PETRI_PLACES=156, PETRI_TRANSITIONS=116} [2023-09-01 03:15:32,067 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 96 predicate places. [2023-09-01 03:15:32,068 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 116 transitions, 1299 flow [2023-09-01 03:15:32,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 155.42857142857142) internal successors, (2176), 14 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:32,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:15:32,068 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:15:32,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-09-01 03:15:32,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:15:32,273 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:15:32,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:15:32,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1556034155, now seen corresponding path program 1 times [2023-09-01 03:15:32,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:15:32,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101976390] [2023-09-01 03:15:32,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:15:32,274 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:15:32,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:15:32,274 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:15:32,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-09-01 03:15:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:15:32,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:15:32,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:15:32,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:15:32,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:15:32,705 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 27 treesize of output 23 [2023-09-01 03:15:32,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:15:32,848 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:15:32,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101976390] [2023-09-01 03:15:32,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101976390] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:15:32,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:15:32,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-09-01 03:15:32,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865713113] [2023-09-01 03:15:32,848 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:15:32,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 03:15:32,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:15:32,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 03:15:32,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-09-01 03:15:36,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 423 [2023-09-01 03:15:36,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 116 transitions, 1299 flow. Second operand has 14 states, 14 states have (on average 163.28571428571428) internal successors, (2286), 14 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:36,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:15:36,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 423 [2023-09-01 03:15:36,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:15:46,554 INFO L130 PetriNetUnfolder]: 37947/52919 cut-off events. [2023-09-01 03:15:46,554 INFO L131 PetriNetUnfolder]: For 172066/174195 co-relation queries the response was YES. [2023-09-01 03:15:46,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191857 conditions, 52919 events. 37947/52919 cut-off events. For 172066/174195 co-relation queries the response was YES. Maximal size of possible extension queue 2654. Compared 368733 event pairs, 13976 based on Foata normal form. 3561/41011 useless extension candidates. Maximal degree in co-relation 191810. Up to 22712 conditions per place. [2023-09-01 03:15:47,154 INFO L137 encePairwiseOnDemand]: 415/423 looper letters, 255 selfloop transitions, 57 changer transitions 0/315 dead transitions. [2023-09-01 03:15:47,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 315 transitions, 2788 flow [2023-09-01 03:15:47,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 03:15:47,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 03:15:47,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2825 transitions. [2023-09-01 03:15:47,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4174054373522459 [2023-09-01 03:15:47,158 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2825 transitions. [2023-09-01 03:15:47,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2825 transitions. [2023-09-01 03:15:47,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:15:47,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2825 transitions. [2023-09-01 03:15:47,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 176.5625) internal successors, (2825), 16 states have internal predecessors, (2825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:47,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 423.0) internal successors, (7191), 17 states have internal predecessors, (7191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:47,166 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 423.0) internal successors, (7191), 17 states have internal predecessors, (7191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:47,166 INFO L175 Difference]: Start difference. First operand has 156 places, 116 transitions, 1299 flow. Second operand 16 states and 2825 transitions. [2023-09-01 03:15:47,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 315 transitions, 2788 flow [2023-09-01 03:15:49,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 315 transitions, 2677 flow, removed 22 selfloop flow, removed 8 redundant places. [2023-09-01 03:15:49,569 INFO L231 Difference]: Finished difference. Result has 163 places, 119 transitions, 1369 flow [2023-09-01 03:15:49,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1369, PETRI_PLACES=163, PETRI_TRANSITIONS=119} [2023-09-01 03:15:49,569 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 103 predicate places. [2023-09-01 03:15:49,569 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 119 transitions, 1369 flow [2023-09-01 03:15:49,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 163.28571428571428) internal successors, (2286), 14 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:49,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:15:49,570 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1] [2023-09-01 03:15:49,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-09-01 03:15:49,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:15:49,780 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:15:49,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:15:49,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1563140197, now seen corresponding path program 1 times [2023-09-01 03:15:49,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:15:49,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778617084] [2023-09-01 03:15:49,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:15:49,781 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:15:49,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:15:49,781 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:15:49,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-09-01 03:15:49,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:15:49,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 03:15:49,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:15:49,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 03:15:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:15:50,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:15:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:15:50,986 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:15:50,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778617084] [2023-09-01 03:15:50,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778617084] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:15:50,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:15:50,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 18 [2023-09-01 03:15:50,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742754561] [2023-09-01 03:15:50,986 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:15:50,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 03:15:50,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:15:50,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 03:15:50,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2023-09-01 03:16:01,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 423 [2023-09-01 03:16:01,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 119 transitions, 1369 flow. Second operand has 19 states, 19 states have (on average 157.10526315789474) internal successors, (2985), 19 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:01,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:16:01,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 423 [2023-09-01 03:16:01,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:16:17,622 INFO L130 PetriNetUnfolder]: 34519/48911 cut-off events. [2023-09-01 03:16:17,622 INFO L131 PetriNetUnfolder]: For 224702/233981 co-relation queries the response was YES. [2023-09-01 03:16:18,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169211 conditions, 48911 events. 34519/48911 cut-off events. For 224702/233981 co-relation queries the response was YES. Maximal size of possible extension queue 2538. Compared 345742 event pairs, 23764 based on Foata normal form. 8600/43463 useless extension candidates. Maximal degree in co-relation 169165. Up to 25293 conditions per place. [2023-09-01 03:16:18,317 INFO L137 encePairwiseOnDemand]: 416/423 looper letters, 358 selfloop transitions, 37 changer transitions 0/407 dead transitions. [2023-09-01 03:16:18,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 407 transitions, 3468 flow [2023-09-01 03:16:18,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 03:16:18,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 03:16:18,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3925 transitions. [2023-09-01 03:16:18,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40343303525542196 [2023-09-01 03:16:18,321 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3925 transitions. [2023-09-01 03:16:18,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3925 transitions. [2023-09-01 03:16:18,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:16:18,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3925 transitions. [2023-09-01 03:16:18,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 170.65217391304347) internal successors, (3925), 23 states have internal predecessors, (3925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:18,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 423.0) internal successors, (10152), 24 states have internal predecessors, (10152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:18,330 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 423.0) internal successors, (10152), 24 states have internal predecessors, (10152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:18,331 INFO L175 Difference]: Start difference. First operand has 163 places, 119 transitions, 1369 flow. Second operand 23 states and 3925 transitions. [2023-09-01 03:16:18,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 407 transitions, 3468 flow [2023-09-01 03:16:18,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 407 transitions, 3270 flow, removed 9 selfloop flow, removed 11 redundant places. [2023-09-01 03:16:18,521 INFO L231 Difference]: Finished difference. Result has 177 places, 125 transitions, 1341 flow [2023-09-01 03:16:18,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1341, PETRI_PLACES=177, PETRI_TRANSITIONS=125} [2023-09-01 03:16:18,521 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 117 predicate places. [2023-09-01 03:16:18,522 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 125 transitions, 1341 flow [2023-09-01 03:16:18,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 157.10526315789474) internal successors, (2985), 19 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:18,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:16:18,522 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 03:16:18,531 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 (25)] Forceful destruction successful, exit code 0 [2023-09-01 03:16:18,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:18,723 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:16:18,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:16:18,723 INFO L85 PathProgramCache]: Analyzing trace with hash -876557415, now seen corresponding path program 3 times [2023-09-01 03:16:18,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:16:18,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348471491] [2023-09-01 03:16:18,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:16:18,724 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:18,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:16:18,725 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:16:18,725 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 (26)] Waiting until timeout for monitored process [2023-09-01 03:16:18,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 03:16:18,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:16:18,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:16:18,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:16:18,994 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:16:18,995 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:16:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:16:19,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:16:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:16:21,608 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:16:21,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348471491] [2023-09-01 03:16:21,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348471491] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:16:21,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:16:21,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 03:16:21,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57406974] [2023-09-01 03:16:21,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:16:21,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 03:16:21,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:16:21,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 03:16:21,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 03:16:38,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 423 [2023-09-01 03:16:38,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 125 transitions, 1341 flow. Second operand has 24 states, 24 states have (on average 163.0) internal successors, (3912), 24 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:38,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:16:38,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 423 [2023-09-01 03:16:38,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:16:49,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:16:51,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:16:53,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:16:55,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:16:57,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:16:59,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:17:01,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:17:03,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:17:05,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:17:07,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:17:09,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:17:24,288 INFO L130 PetriNetUnfolder]: 49743/70704 cut-off events. [2023-09-01 03:17:24,288 INFO L131 PetriNetUnfolder]: For 315673/329028 co-relation queries the response was YES. [2023-09-01 03:17:24,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240246 conditions, 70704 events. 49743/70704 cut-off events. For 315673/329028 co-relation queries the response was YES. Maximal size of possible extension queue 2722. Compared 513894 event pairs, 34452 based on Foata normal form. 12350/62972 useless extension candidates. Maximal degree in co-relation 240199. Up to 8429 conditions per place. [2023-09-01 03:17:25,425 INFO L137 encePairwiseOnDemand]: 416/423 looper letters, 439 selfloop transitions, 73 changer transitions 0/524 dead transitions. [2023-09-01 03:17:25,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 524 transitions, 4682 flow [2023-09-01 03:17:25,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 03:17:25,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 03:17:25,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4465 transitions. [2023-09-01 03:17:25,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2023-09-01 03:17:25,438 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4465 transitions. [2023-09-01 03:17:25,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4465 transitions. [2023-09-01 03:17:25,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:17:25,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4465 transitions. [2023-09-01 03:17:25,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 178.6) internal successors, (4465), 25 states have internal predecessors, (4465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:25,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 423.0) internal successors, (10998), 26 states have internal predecessors, (10998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:25,457 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 423.0) internal successors, (10998), 26 states have internal predecessors, (10998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:25,458 INFO L175 Difference]: Start difference. First operand has 177 places, 125 transitions, 1341 flow. Second operand 25 states and 4465 transitions. [2023-09-01 03:17:25,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 524 transitions, 4682 flow [2023-09-01 03:17:25,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 524 transitions, 4584 flow, removed 10 selfloop flow, removed 8 redundant places. [2023-09-01 03:17:25,784 INFO L231 Difference]: Finished difference. Result has 210 places, 157 transitions, 1919 flow [2023-09-01 03:17:25,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1919, PETRI_PLACES=210, PETRI_TRANSITIONS=157} [2023-09-01 03:17:25,785 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 150 predicate places. [2023-09-01 03:17:25,785 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 157 transitions, 1919 flow [2023-09-01 03:17:25,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 163.0) internal successors, (3912), 24 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:25,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:17:25,786 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 03:17:25,799 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 (26)] Forceful destruction successful, exit code 0 [2023-09-01 03:17:25,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:17:25,997 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:17:25,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:17:25,997 INFO L85 PathProgramCache]: Analyzing trace with hash -992414767, now seen corresponding path program 2 times [2023-09-01 03:17:25,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:17:25,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612359235] [2023-09-01 03:17:25,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:17:25,998 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:17:25,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:17:26,000 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:17:26,000 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 (27)] Waiting until timeout for monitored process [2023-09-01 03:17:26,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 03:17:26,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:17:26,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 03:17:26,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:17:26,232 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:17:26,232 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:17:26,368 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:17:26,368 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:17:26,455 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-09-01 03:17:26,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 03:17:26,473 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 03:17:26,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 03:17:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-09-01 03:17:26,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:17:26,607 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:17:26,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612359235] [2023-09-01 03:17:26,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612359235] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:17:26,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:17:26,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:17:26,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288547124] [2023-09-01 03:17:26,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:17:26,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:17:26,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:17:26,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:17:26,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:17:27,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 423 [2023-09-01 03:17:27,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 157 transitions, 1919 flow. Second operand has 5 states, 5 states have (on average 162.6) internal successors, (813), 5 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:27,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:17:27,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 423 [2023-09-01 03:17:27,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:17:35,603 INFO L130 PetriNetUnfolder]: 32296/45976 cut-off events. [2023-09-01 03:17:35,603 INFO L131 PetriNetUnfolder]: For 192693/202257 co-relation queries the response was YES. [2023-09-01 03:17:36,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159569 conditions, 45976 events. 32296/45976 cut-off events. For 192693/202257 co-relation queries the response was YES. Maximal size of possible extension queue 1771. Compared 325228 event pairs, 21503 based on Foata normal form. 10454/45945 useless extension candidates. Maximal degree in co-relation 159504. Up to 45424 conditions per place. [2023-09-01 03:17:36,244 INFO L137 encePairwiseOnDemand]: 417/423 looper letters, 90 selfloop transitions, 49 changer transitions 0/151 dead transitions. [2023-09-01 03:17:36,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 151 transitions, 2159 flow [2023-09-01 03:17:36,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:17:36,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:17:36,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 837 transitions. [2023-09-01 03:17:36,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39574468085106385 [2023-09-01 03:17:36,247 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 837 transitions. [2023-09-01 03:17:36,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 837 transitions. [2023-09-01 03:17:36,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:17:36,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 837 transitions. [2023-09-01 03:17:36,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 167.4) internal successors, (837), 5 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:36,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:36,250 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:36,250 INFO L175 Difference]: Start difference. First operand has 210 places, 157 transitions, 1919 flow. Second operand 5 states and 837 transitions. [2023-09-01 03:17:36,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 151 transitions, 2159 flow [2023-09-01 03:17:36,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 151 transitions, 1994 flow, removed 34 selfloop flow, removed 10 redundant places. [2023-09-01 03:17:36,693 INFO L231 Difference]: Finished difference. Result has 198 places, 151 transitions, 1814 flow [2023-09-01 03:17:36,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1716, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1814, PETRI_PLACES=198, PETRI_TRANSITIONS=151} [2023-09-01 03:17:36,694 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 138 predicate places. [2023-09-01 03:17:36,694 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 151 transitions, 1814 flow [2023-09-01 03:17:36,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 162.6) internal successors, (813), 5 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:36,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:17:36,694 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:17:36,701 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 (27)] Ended with exit code 0 [2023-09-01 03:17:36,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:17:36,895 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:17:36,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:17:36,895 INFO L85 PathProgramCache]: Analyzing trace with hash -986087998, now seen corresponding path program 2 times [2023-09-01 03:17:36,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:17:36,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [694160555] [2023-09-01 03:17:36,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:17:36,895 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:17:36,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:17:36,896 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:17:36,898 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 (28)] Waiting until timeout for monitored process [2023-09-01 03:17:37,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 03:17:37,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:17:37,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 03:17:37,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:17:37,091 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:17:37,091 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:17:37,175 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:17:37,175 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:17:37,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:17:37,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 03:17:37,238 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 03:17:37,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 03:17:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 03:17:37,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:17:37,336 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:17:37,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [694160555] [2023-09-01 03:17:37,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [694160555] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:17:37,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:17:37,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 03:17:37,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724987405] [2023-09-01 03:17:37,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:17:37,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:17:37,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:17:37,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:17:37,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:17:37,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 423 [2023-09-01 03:17:37,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 151 transitions, 1814 flow. Second operand has 6 states, 6 states have (on average 161.66666666666666) internal successors, (970), 6 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:37,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:17:37,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 423 [2023-09-01 03:17:37,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:17:46,121 INFO L130 PetriNetUnfolder]: 33953/47726 cut-off events. [2023-09-01 03:17:46,122 INFO L131 PetriNetUnfolder]: For 207610/213394 co-relation queries the response was YES. [2023-09-01 03:17:46,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163754 conditions, 47726 events. 33953/47726 cut-off events. For 207610/213394 co-relation queries the response was YES. Maximal size of possible extension queue 1708. Compared 329036 event pairs, 13958 based on Foata normal form. 7756/44746 useless extension candidates. Maximal degree in co-relation 163688. Up to 30732 conditions per place. [2023-09-01 03:17:46,801 INFO L137 encePairwiseOnDemand]: 417/423 looper letters, 142 selfloop transitions, 30 changer transitions 0/182 dead transitions. [2023-09-01 03:17:46,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 182 transitions, 2344 flow [2023-09-01 03:17:46,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:17:46,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:17:46,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1010 transitions. [2023-09-01 03:17:46,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979511426319937 [2023-09-01 03:17:46,803 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1010 transitions. [2023-09-01 03:17:46,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1010 transitions. [2023-09-01 03:17:46,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:17:46,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1010 transitions. [2023-09-01 03:17:46,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 168.33333333333334) internal successors, (1010), 6 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:46,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:46,815 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:46,815 INFO L175 Difference]: Start difference. First operand has 198 places, 151 transitions, 1814 flow. Second operand 6 states and 1010 transitions. [2023-09-01 03:17:46,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 182 transitions, 2344 flow [2023-09-01 03:17:47,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 182 transitions, 2272 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 03:17:47,272 INFO L231 Difference]: Finished difference. Result has 201 places, 151 transitions, 1807 flow [2023-09-01 03:17:47,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1742, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1807, PETRI_PLACES=201, PETRI_TRANSITIONS=151} [2023-09-01 03:17:47,273 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 141 predicate places. [2023-09-01 03:17:47,273 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 151 transitions, 1807 flow [2023-09-01 03:17:47,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.66666666666666) internal successors, (970), 6 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:47,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:17:47,273 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 03:17:47,281 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 (28)] Ended with exit code 0 [2023-09-01 03:17:47,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:17:47,474 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:17:47,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:17:47,474 INFO L85 PathProgramCache]: Analyzing trace with hash -992414769, now seen corresponding path program 3 times [2023-09-01 03:17:47,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:17:47,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [227940299] [2023-09-01 03:17:47,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:17:47,475 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:17:47,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:17:47,477 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:17:47,478 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 (29)] Waiting until timeout for monitored process [2023-09-01 03:17:47,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 03:17:47,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:17:47,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:17:47,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:17:47,748 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:17:47,748 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:17:47,832 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:17:47,832 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:17:47,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:17:47,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 03:17:47,892 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 03:17:47,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 03:17:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 03:17:47,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:17:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 03:17:48,647 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:17:48,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [227940299] [2023-09-01 03:17:48,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [227940299] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:17:48,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:17:48,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:17:48,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486301315] [2023-09-01 03:17:48,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:17:48,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:17:48,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:17:48,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:17:48,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:17:54,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 423 [2023-09-01 03:17:54,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 151 transitions, 1807 flow. Second operand has 12 states, 12 states have (on average 160.66666666666666) internal successors, (1928), 12 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:54,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:17:54,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 423 [2023-09-01 03:17:54,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:18:14,223 INFO L130 PetriNetUnfolder]: 68535/95652 cut-off events. [2023-09-01 03:18:14,224 INFO L131 PetriNetUnfolder]: For 176955/186511 co-relation queries the response was YES. [2023-09-01 03:18:15,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354847 conditions, 95652 events. 68535/95652 cut-off events. For 176955/186511 co-relation queries the response was YES. Maximal size of possible extension queue 3472. Compared 698229 event pairs, 6369 based on Foata normal form. 14996/89379 useless extension candidates. Maximal degree in co-relation 354780. Up to 16006 conditions per place. [2023-09-01 03:18:16,117 INFO L137 encePairwiseOnDemand]: 417/423 looper letters, 224 selfloop transitions, 49 changer transitions 0/276 dead transitions. [2023-09-01 03:18:16,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 276 transitions, 2924 flow [2023-09-01 03:18:16,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 03:18:16,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 03:18:16,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1731 transitions. [2023-09-01 03:18:16,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40921985815602835 [2023-09-01 03:18:16,124 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1731 transitions. [2023-09-01 03:18:16,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1731 transitions. [2023-09-01 03:18:16,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:18:16,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1731 transitions. [2023-09-01 03:18:16,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 173.1) internal successors, (1731), 10 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:18:16,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 423.0) internal successors, (4653), 11 states have internal predecessors, (4653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:18:16,128 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 423.0) internal successors, (4653), 11 states have internal predecessors, (4653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:18:16,128 INFO L175 Difference]: Start difference. First operand has 201 places, 151 transitions, 1807 flow. Second operand 10 states and 1731 transitions. [2023-09-01 03:18:16,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 276 transitions, 2924 flow [2023-09-01 03:18:16,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 276 transitions, 2837 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-09-01 03:18:16,808 INFO L231 Difference]: Finished difference. Result has 209 places, 156 transitions, 1977 flow [2023-09-01 03:18:16,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1744, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1977, PETRI_PLACES=209, PETRI_TRANSITIONS=156} [2023-09-01 03:18:16,808 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 149 predicate places. [2023-09-01 03:18:16,808 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 156 transitions, 1977 flow [2023-09-01 03:18:16,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 160.66666666666666) internal successors, (1928), 12 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:18:16,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:18:16,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:18:16,825 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 (29)] Forceful destruction successful, exit code 0 [2023-09-01 03:18:17,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:18:17,019 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 03:18:17,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:18:17,020 INFO L85 PathProgramCache]: Analyzing trace with hash 328013901, now seen corresponding path program 1 times [2023-09-01 03:18:17,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:18:17,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772215932] [2023-09-01 03:18:17,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:18:17,020 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:18:17,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:18:17,021 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:18:17,022 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 (30)] Waiting until timeout for monitored process [2023-09-01 03:18:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:18:17,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 03:18:17,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:18:17,267 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:18:17,267 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:18:17,345 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:18:17,346 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:18:17,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:18:17,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 03:18:17,630 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 03:18:17,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 03:18:17,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:18:17,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:18:25,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:18:25,343 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:18:25,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772215932] [2023-09-01 03:18:25,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772215932] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:18:25,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:18:25,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:18:25,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828811379] [2023-09-01 03:18:25,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:18:25,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:18:25,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:18:25,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:18:25,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:18:27,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:18:30,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:18:38,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:18:40,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:18:44,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 423 [2023-09-01 03:18:44,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 156 transitions, 1977 flow. Second operand has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:18:44,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:18:44,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 423 [2023-09-01 03:18:44,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:18:51,166 WARN L222 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:19:09,935 WARN L222 SmtUtils]: Spent 10.50s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:19:23,346 WARN L222 SmtUtils]: Spent 9.86s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:19:25,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:19:27,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:19:51,020 WARN L222 SmtUtils]: Spent 8.33s on a formula simplification. DAG size of input: 61 DAG size of output: 60 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)