./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/array-eq-symm.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 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:34:13,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:34:13,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:34:13,779 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:34:13,780 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:34:13,781 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:34:13,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:34:13,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:34:13,785 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:34:13,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:34:13,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:34:13,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:34:13,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:34:13,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:34:13,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:34:13,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:34:13,793 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:34:13,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:34:13,796 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:34:13,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:34:13,798 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:34:13,806 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:34:13,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:34:13,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:34:13,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:34:13,820 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:34:13,821 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:34:13,822 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:34:13,823 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:34:13,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:34:13,824 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:34:13,825 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:34:13,826 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:34:13,826 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:34:13,827 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:34:13,827 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:34:13,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:34:13,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:34:13,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:34:13,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:34:13,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:34:13,834 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:34:13,860 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:34:13,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:34:13,863 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:34:13,863 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:34:13,864 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:34:13,864 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:34:13,865 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:34:13,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:34:13,865 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:34:13,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:34:13,866 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:34:13,866 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:34:13,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:34:13,867 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:34:13,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:34:13,867 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:34:13,867 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:34:13,868 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:34:13,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:34:13,868 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:34:13,868 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:34:13,868 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:34:13,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:34:13,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:34:13,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:34:13,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:34:13,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:34:13,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:34:13,870 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:34:13,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:34:13,870 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:34:13,870 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:34:13,871 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:34:13,871 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:34:13,871 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:34:14,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:34:14,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:34:14,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:34:14,223 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:34:14,223 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:34:14,224 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-08-30 04:34:15,520 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:34:15,735 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:34:15,736 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-08-30 04:34:15,743 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9108bee2/24eaed1cffbc4809aace584c3d4b7021/FLAG9c6eb915f [2023-08-30 04:34:15,759 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9108bee2/24eaed1cffbc4809aace584c3d4b7021 [2023-08-30 04:34:15,762 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:34:15,764 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:34:15,765 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:34:15,765 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:34:15,768 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:34:15,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:34:15" (1/1) ... [2023-08-30 04:34:15,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44d2de38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:15, skipping insertion in model container [2023-08-30 04:34:15,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:34:15" (1/1) ... [2023-08-30 04:34:15,778 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:34:15,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:34:15,971 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/array-eq-symm.wvr.c[2251,2264] [2023-08-30 04:34:15,991 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:34:16,003 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 04:34:16,005 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@164e6ef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:16, skipping insertion in model container [2023-08-30 04:34:16,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:34:16,006 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 04:34:16,009 INFO L158 Benchmark]: Toolchain (without parser) took 243.10ms. Allocated memory is still 90.2MB. Free memory was 68.3MB in the beginning and 58.7MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 04:34:16,009 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 62.9MB. Free memory is still 40.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 04:34:16,010 INFO L158 Benchmark]: CACSL2BoogieTranslator took 241.16ms. Allocated memory is still 90.2MB. Free memory was 68.1MB in the beginning and 58.9MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 04:34:16,011 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 62.9MB. Free memory is still 40.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 241.16ms. Allocated memory is still 90.2MB. Free memory was 68.1MB in the beginning and 58.9MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 94]: 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/array-eq-symm.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 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:34:17,721 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:34:17,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:34:17,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:34:17,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:34:17,769 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:34:17,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:34:17,774 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:34:17,776 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:34:17,777 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:34:17,778 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:34:17,779 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:34:17,779 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:34:17,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:34:17,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:34:17,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:34:17,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:34:17,783 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:34:17,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:34:17,788 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:34:17,791 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:34:17,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:34:17,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:34:17,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:34:17,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:34:17,797 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:34:17,797 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:34:17,800 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:34:17,800 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:34:17,801 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:34:17,801 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:34:17,802 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:34:17,803 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:34:17,803 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:34:17,804 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:34:17,804 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:34:17,805 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:34:17,805 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:34:17,806 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:34:17,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:34:17,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:34:17,812 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 04:34:17,851 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:34:17,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:34:17,853 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:34:17,853 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:34:17,854 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:34:17,854 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:34:17,854 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:34:17,855 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:34:17,855 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:34:17,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:34:17,856 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:34:17,856 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:34:17,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:34:17,856 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:34:17,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:34:17,857 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:34:17,857 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:34:17,857 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:34:17,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:34:17,857 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:34:17,857 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 04:34:17,858 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 04:34:17,858 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:34:17,858 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:34:17,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:34:17,858 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:34:17,859 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:34:17,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:34:17,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:34:17,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:34:17,859 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 04:34:17,859 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 04:34:17,860 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:34:17,860 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:34:17,860 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:34:17,860 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 04:34:17,860 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:34:17,861 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:34:18,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:34:18,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:34:18,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:34:18,168 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:34:18,169 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:34:18,170 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-08-30 04:34:19,435 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:34:19,628 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:34:19,629 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-08-30 04:34:19,637 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea535154e/85fef4c464094097b5cf8b862c3297d7/FLAG81b27b989 [2023-08-30 04:34:19,650 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea535154e/85fef4c464094097b5cf8b862c3297d7 [2023-08-30 04:34:19,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:34:19,654 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:34:19,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:34:19,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:34:19,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:34:19,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:34:19" (1/1) ... [2023-08-30 04:34:19,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2986989c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:19, skipping insertion in model container [2023-08-30 04:34:19,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:34:19" (1/1) ... [2023-08-30 04:34:19,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:34:19,679 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:34:19,831 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/array-eq-symm.wvr.c[2251,2264] [2023-08-30 04:34:19,842 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:34:19,858 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 04:34:19,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:34:19,890 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/array-eq-symm.wvr.c[2251,2264] [2023-08-30 04:34:19,896 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:34:19,906 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:34:19,932 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/array-eq-symm.wvr.c[2251,2264] [2023-08-30 04:34:19,942 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:34:19,960 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:34:19,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:19 WrapperNode [2023-08-30 04:34:19,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:34:19,962 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:34:19,962 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:34:19,962 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:34:19,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:19" (1/1) ... [2023-08-30 04:34:19,994 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:19" (1/1) ... [2023-08-30 04:34:20,021 INFO L138 Inliner]: procedures = 25, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 112 [2023-08-30 04:34:20,022 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:34:20,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:34:20,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:34:20,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:34:20,031 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:19" (1/1) ... [2023-08-30 04:34:20,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:19" (1/1) ... [2023-08-30 04:34:20,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:19" (1/1) ... [2023-08-30 04:34:20,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:19" (1/1) ... [2023-08-30 04:34:20,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:19" (1/1) ... [2023-08-30 04:34:20,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:19" (1/1) ... [2023-08-30 04:34:20,071 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:19" (1/1) ... [2023-08-30 04:34:20,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:19" (1/1) ... [2023-08-30 04:34:20,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:34:20,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:34:20,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:34:20,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:34:20,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:19" (1/1) ... [2023-08-30 04:34:20,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:34:20,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:34:20,118 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 04:34:20,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 04:34:20,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:34:20,155 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 04:34:20,155 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 04:34:20,155 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 04:34:20,156 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 04:34:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 04:34:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:34:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 04:34:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 04:34:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:34:20,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:34:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:34:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 04:34:20,158 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 04:34:20,264 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:34:20,266 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:34:20,645 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:34:20,653 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:34:20,653 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 04:34:20,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:34:20 BoogieIcfgContainer [2023-08-30 04:34:20,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:34:20,657 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:34:20,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:34:20,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:34:20,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:34:19" (1/3) ... [2023-08-30 04:34:20,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f107b30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:34:20, skipping insertion in model container [2023-08-30 04:34:20,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:19" (2/3) ... [2023-08-30 04:34:20,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f107b30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:34:20, skipping insertion in model container [2023-08-30 04:34:20,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:34:20" (3/3) ... [2023-08-30 04:34:20,663 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2023-08-30 04:34:20,676 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:34:20,677 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-08-30 04:34:20,677 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:34:20,775 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 04:34:20,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 183 transitions, 382 flow [2023-08-30 04:34:20,863 INFO L130 PetriNetUnfolder]: 15/181 cut-off events. [2023-08-30 04:34:20,863 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 04:34:20,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 181 events. 15/181 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 234 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 131. Up to 3 conditions per place. [2023-08-30 04:34:20,869 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 183 transitions, 382 flow [2023-08-30 04:34:20,873 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 177 transitions, 366 flow [2023-08-30 04:34:20,877 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:34:20,885 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 177 transitions, 366 flow [2023-08-30 04:34:20,888 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 177 transitions, 366 flow [2023-08-30 04:34:20,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 177 transitions, 366 flow [2023-08-30 04:34:20,928 INFO L130 PetriNetUnfolder]: 15/177 cut-off events. [2023-08-30 04:34:20,928 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 04:34:20,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 177 events. 15/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 236 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 131. Up to 3 conditions per place. [2023-08-30 04:34:20,931 INFO L119 LiptonReduction]: Number of co-enabled transitions 1720 [2023-08-30 04:34:35,391 INFO L134 LiptonReduction]: Checked pairs total: 2648 [2023-08-30 04:34:35,391 INFO L136 LiptonReduction]: Total number of compositions: 192 [2023-08-30 04:34:35,404 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:34:35,410 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;@2e49a4a6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:34:35,410 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2023-08-30 04:34:35,413 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 04:34:35,413 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:34:35,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:34:35,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:34:35,415 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:34:35,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:34:35,419 INFO L85 PathProgramCache]: Analyzing trace with hash 22182, now seen corresponding path program 1 times [2023-08-30 04:34:35,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:34:35,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532520842] [2023-08-30 04:34:35,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:34:35,430 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:34:35,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:34:35,432 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:34:35,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 04:34:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:34:35,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:34:35,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:34:35,784 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 04:34:35,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 04:34:35,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:34:35,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:34:35,843 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:34:35,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532520842] [2023-08-30 04:34:35,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532520842] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:34:35,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:34:35,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:34:35,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044839941] [2023-08-30 04:34:35,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:34:35,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:34:35,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:34:35,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:34:35,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:34:36,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 375 [2023-08-30 04:34:36,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:36,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:34:36,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 375 [2023-08-30 04:34:36,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:34:36,642 INFO L130 PetriNetUnfolder]: 753/1213 cut-off events. [2023-08-30 04:34:36,642 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-30 04:34:36,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2476 conditions, 1213 events. 753/1213 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 5819 event pairs, 574 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 1106. Up to 609 conditions per place. [2023-08-30 04:34:36,656 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 71 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2023-08-30 04:34:36,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 75 transitions, 324 flow [2023-08-30 04:34:36,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:34:36,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:34:36,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 556 transitions. [2023-08-30 04:34:36,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49422222222222223 [2023-08-30 04:34:36,677 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 556 transitions. [2023-08-30 04:34:36,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 556 transitions. [2023-08-30 04:34:36,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:34:36,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 556 transitions. [2023-08-30 04:34:36,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:36,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:36,693 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:36,695 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 92 flow. Second operand 3 states and 556 transitions. [2023-08-30 04:34:36,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 75 transitions, 324 flow [2023-08-30 04:34:36,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 75 transitions, 308 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 04:34:36,701 INFO L231 Difference]: Finished difference. Result has 41 places, 42 transitions, 114 flow [2023-08-30 04:34:36,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=41, PETRI_TRANSITIONS=42} [2023-08-30 04:34:36,706 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-08-30 04:34:36,706 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 42 transitions, 114 flow [2023-08-30 04:34:36,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:36,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:34:36,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:34:36,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 04:34:36,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:34:36,917 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:34:36,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:34:36,918 INFO L85 PathProgramCache]: Analyzing trace with hash 22181, now seen corresponding path program 1 times [2023-08-30 04:34:36,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:34:36,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1327259121] [2023-08-30 04:34:36,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:34:36,919 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:34:36,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:34:36,921 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:34:36,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 04:34:36,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:34:36,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 04:34:36,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:34:37,014 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:34:37,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:34:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:34:37,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:34:37,038 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:34:37,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1327259121] [2023-08-30 04:34:37,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1327259121] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:34:37,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:34:37,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:34:37,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871725412] [2023-08-30 04:34:37,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:34:37,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:34:37,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:34:37,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:34:37,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:34:37,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 375 [2023-08-30 04:34:37,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 42 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:37,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:34:37,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 375 [2023-08-30 04:34:37,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:34:37,456 INFO L130 PetriNetUnfolder]: 753/1209 cut-off events. [2023-08-30 04:34:37,457 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:34:37,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2451 conditions, 1209 events. 753/1209 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 5832 event pairs, 574 based on Foata normal form. 2/329 useless extension candidates. Maximal degree in co-relation 1214. Up to 1209 conditions per place. [2023-08-30 04:34:37,463 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 39 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-30 04:34:37,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 40 transitions, 190 flow [2023-08-30 04:34:37,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:34:37,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:34:37,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2023-08-30 04:34:37,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45866666666666667 [2023-08-30 04:34:37,466 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2023-08-30 04:34:37,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2023-08-30 04:34:37,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:34:37,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2023-08-30 04:34:37,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:37,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:37,471 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:37,471 INFO L175 Difference]: Start difference. First operand has 41 places, 42 transitions, 114 flow. Second operand 3 states and 516 transitions. [2023-08-30 04:34:37,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 40 transitions, 190 flow [2023-08-30 04:34:37,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 40 transitions, 182 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:34:37,473 INFO L231 Difference]: Finished difference. Result has 39 places, 40 transitions, 104 flow [2023-08-30 04:34:37,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=39, PETRI_TRANSITIONS=40} [2023-08-30 04:34:37,474 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-08-30 04:34:37,474 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 40 transitions, 104 flow [2023-08-30 04:34:37,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:37,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:34:37,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:34:37,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 04:34:37,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:34:37,684 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:34:37,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:34:37,685 INFO L85 PathProgramCache]: Analyzing trace with hash 690091, now seen corresponding path program 1 times [2023-08-30 04:34:37,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:34:37,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631955282] [2023-08-30 04:34:37,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:34:37,686 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:34:37,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:34:37,687 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:34:37,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 04:34:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:34:37,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:34:37,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:34:37,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:34:37,807 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2023-08-30 04:34:37,808 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 3 case distinctions, treesize of input 22 treesize of output 33 [2023-08-30 04:34:37,861 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 04:34:37,862 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 [2023-08-30 04:34:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:34:37,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:34:37,872 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:34:37,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631955282] [2023-08-30 04:34:37,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631955282] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:34:37,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:34:37,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:34:37,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742791483] [2023-08-30 04:34:37,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:34:37,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:34:37,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:34:37,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:34:37,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:34:38,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 375 [2023-08-30 04:34:38,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 40 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:38,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:34:38,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 375 [2023-08-30 04:34:38,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:34:38,341 INFO L130 PetriNetUnfolder]: 573/943 cut-off events. [2023-08-30 04:34:38,341 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 04:34:38,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1916 conditions, 943 events. 573/943 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 4393 event pairs, 432 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 1908. Up to 943 conditions per place. [2023-08-30 04:34:38,345 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 37 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-30 04:34:38,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 38 transitions, 176 flow [2023-08-30 04:34:38,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:34:38,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:34:38,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 523 transitions. [2023-08-30 04:34:38,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4648888888888889 [2023-08-30 04:34:38,348 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 523 transitions. [2023-08-30 04:34:38,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 523 transitions. [2023-08-30 04:34:38,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:34:38,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 523 transitions. [2023-08-30 04:34:38,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:38,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:38,353 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:38,354 INFO L175 Difference]: Start difference. First operand has 39 places, 40 transitions, 104 flow. Second operand 3 states and 523 transitions. [2023-08-30 04:34:38,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 38 transitions, 176 flow [2023-08-30 04:34:38,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:34:38,356 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 101 flow [2023-08-30 04:34:38,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2023-08-30 04:34:38,360 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2023-08-30 04:34:38,361 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 101 flow [2023-08-30 04:34:38,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:38,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:34:38,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:34:38,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 04:34:38,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:34:38,571 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:34:38,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:34:38,576 INFO L85 PathProgramCache]: Analyzing trace with hash 690093, now seen corresponding path program 1 times [2023-08-30 04:34:38,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:34:38,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289964171] [2023-08-30 04:34:38,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:34:38,578 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:34:38,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:34:38,579 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:34:38,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 04:34:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:34:38,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 04:34:38,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:34:38,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:34:38,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:34:38,689 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 04:34:38,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 04:34:38,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 04:34:38,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:34:38,752 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 [2023-08-30 04:34:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:34:38,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:34:38,777 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:34:38,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289964171] [2023-08-30 04:34:38,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289964171] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:34:38,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:34:38,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:34:38,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60581279] [2023-08-30 04:34:38,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:34:38,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:34:38,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:34:38,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:34:38,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:34:39,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 375 [2023-08-30 04:34:39,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 162.75) internal successors, (651), 4 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:39,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:34:39,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 375 [2023-08-30 04:34:39,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:34:39,242 INFO L130 PetriNetUnfolder]: 393/677 cut-off events. [2023-08-30 04:34:39,243 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 04:34:39,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1385 conditions, 677 events. 393/677 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 3042 event pairs, 290 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 1376. Up to 677 conditions per place. [2023-08-30 04:34:39,246 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 35 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-08-30 04:34:39,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 36 transitions, 169 flow [2023-08-30 04:34:39,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:34:39,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:34:39,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2023-08-30 04:34:39,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4631111111111111 [2023-08-30 04:34:39,249 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2023-08-30 04:34:39,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2023-08-30 04:34:39,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:34:39,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2023-08-30 04:34:39,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:39,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:39,254 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:39,254 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 101 flow. Second operand 3 states and 521 transitions. [2023-08-30 04:34:39,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 36 transitions, 169 flow [2023-08-30 04:34:39,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:34:39,255 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 98 flow [2023-08-30 04:34:39,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2023-08-30 04:34:39,256 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2023-08-30 04:34:39,256 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 98 flow [2023-08-30 04:34:39,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 162.75) internal successors, (651), 4 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:39,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:34:39,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:34:39,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 04:34:39,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:34:39,467 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:34:39,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:34:39,467 INFO L85 PathProgramCache]: Analyzing trace with hash 689550, now seen corresponding path program 1 times [2023-08-30 04:34:39,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:34:39,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195891807] [2023-08-30 04:34:39,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:34:39,468 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:34:39,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:34:39,469 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:34:39,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 04:34:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:34:39,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 04:34:39,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:34:39,592 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 04:34:39,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 04:34:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:34:39,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:34:39,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:34:39,847 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:34:39,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195891807] [2023-08-30 04:34:39,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [195891807] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:34:39,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:34:39,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 04:34:39,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331874598] [2023-08-30 04:34:39,848 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:34:39,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:34:39,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:34:39,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:34:39,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:34:40,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 375 [2023-08-30 04:34:40,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 98 flow. Second operand has 6 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:40,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:34:40,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 375 [2023-08-30 04:34:40,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:34:41,915 INFO L130 PetriNetUnfolder]: 593/1022 cut-off events. [2023-08-30 04:34:41,916 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-30 04:34:41,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2093 conditions, 1022 events. 593/1022 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 5030 event pairs, 435 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 2083. Up to 340 conditions per place. [2023-08-30 04:34:41,921 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 86 selfloop transitions, 15 changer transitions 0/101 dead transitions. [2023-08-30 04:34:41,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 101 transitions, 456 flow [2023-08-30 04:34:41,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:34:41,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:34:41,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1001 transitions. [2023-08-30 04:34:41,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448888888888889 [2023-08-30 04:34:41,925 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1001 transitions. [2023-08-30 04:34:41,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1001 transitions. [2023-08-30 04:34:41,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:34:41,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1001 transitions. [2023-08-30 04:34:41,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 166.83333333333334) internal successors, (1001), 6 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:41,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:41,932 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:41,933 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 98 flow. Second operand 6 states and 1001 transitions. [2023-08-30 04:34:41,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 101 transitions, 456 flow [2023-08-30 04:34:41,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 101 transitions, 455 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:34:41,935 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 210 flow [2023-08-30 04:34:41,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2023-08-30 04:34:41,936 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-08-30 04:34:41,936 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 210 flow [2023-08-30 04:34:41,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:41,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:34:41,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:34:41,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 04:34:42,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:34:42,146 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:34:42,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:34:42,146 INFO L85 PathProgramCache]: Analyzing trace with hash 663193595, now seen corresponding path program 1 times [2023-08-30 04:34:42,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:34:42,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921886923] [2023-08-30 04:34:42,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:34:42,147 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:34:42,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:34:42,148 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:34:42,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 04:34:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:34:42,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 04:34:42,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:34:42,220 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 [2023-08-30 04:34:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:34:42,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:34:42,234 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:34:42,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921886923] [2023-08-30 04:34:42,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921886923] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:34:42,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:34:42,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:34:42,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038785782] [2023-08-30 04:34:42,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:34:42,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:34:42,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:34:42,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:34:42,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:34:42,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 375 [2023-08-30 04:34:42,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:42,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:34:42,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 375 [2023-08-30 04:34:42,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:34:42,643 INFO L130 PetriNetUnfolder]: 455/788 cut-off events. [2023-08-30 04:34:42,643 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-30 04:34:42,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1667 conditions, 788 events. 455/788 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3603 event pairs, 315 based on Foata normal form. 0/319 useless extension candidates. Maximal degree in co-relation 1652. Up to 770 conditions per place. [2023-08-30 04:34:42,647 INFO L137 encePairwiseOnDemand]: 371/375 looper letters, 41 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2023-08-30 04:34:42,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 296 flow [2023-08-30 04:34:42,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:34:42,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:34:42,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 645 transitions. [2023-08-30 04:34:42,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2023-08-30 04:34:42,650 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 645 transitions. [2023-08-30 04:34:42,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 645 transitions. [2023-08-30 04:34:42,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:34:42,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 645 transitions. [2023-08-30 04:34:42,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:42,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:42,654 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:42,655 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 210 flow. Second operand 4 states and 645 transitions. [2023-08-30 04:34:42,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 296 flow [2023-08-30 04:34:42,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 277 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 04:34:42,657 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 195 flow [2023-08-30 04:34:42,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=195, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-30 04:34:42,658 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-08-30 04:34:42,658 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 195 flow [2023-08-30 04:34:42,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:42,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:34:42,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:34:42,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 04:34:42,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:34:42,868 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:34:42,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:34:42,869 INFO L85 PathProgramCache]: Analyzing trace with hash 663193558, now seen corresponding path program 1 times [2023-08-30 04:34:42,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:34:42,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1303118737] [2023-08-30 04:34:42,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:34:42,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:34:42,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:34:42,870 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:34:42,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 04:34:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:34:42,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:34:42,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:34:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:34:43,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:34:43,010 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:34:43,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1303118737] [2023-08-30 04:34:43,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1303118737] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:34:43,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:34:43,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:34:43,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626872657] [2023-08-30 04:34:43,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:34:43,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:34:43,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:34:43,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:34:43,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:34:43,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 375 [2023-08-30 04:34:43,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 195 flow. Second operand has 4 states, 4 states have (on average 158.25) internal successors, (633), 4 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:43,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:34:43,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 375 [2023-08-30 04:34:43,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:34:43,514 INFO L130 PetriNetUnfolder]: 592/1084 cut-off events. [2023-08-30 04:34:43,514 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-08-30 04:34:43,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2293 conditions, 1084 events. 592/1084 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5674 event pairs, 426 based on Foata normal form. 0/477 useless extension candidates. Maximal degree in co-relation 2277. Up to 787 conditions per place. [2023-08-30 04:34:43,519 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 69 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2023-08-30 04:34:43,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 72 transitions, 443 flow [2023-08-30 04:34:43,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:34:43,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:34:43,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 686 transitions. [2023-08-30 04:34:43,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573333333333333 [2023-08-30 04:34:43,522 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 686 transitions. [2023-08-30 04:34:43,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 686 transitions. [2023-08-30 04:34:43,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:34:43,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 686 transitions. [2023-08-30 04:34:43,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:43,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:43,527 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:43,527 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 195 flow. Second operand 4 states and 686 transitions. [2023-08-30 04:34:43,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 72 transitions, 443 flow [2023-08-30 04:34:43,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 72 transitions, 435 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:34:43,530 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 205 flow [2023-08-30 04:34:43,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-08-30 04:34:43,531 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2023-08-30 04:34:43,531 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 205 flow [2023-08-30 04:34:43,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.25) internal successors, (633), 4 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:43,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:34:43,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:34:43,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 04:34:43,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:34:43,737 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:34:43,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:34:43,737 INFO L85 PathProgramCache]: Analyzing trace with hash 663193646, now seen corresponding path program 1 times [2023-08-30 04:34:43,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:34:43,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956233813] [2023-08-30 04:34:43,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:34:43,738 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:34:43,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:34:43,739 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:34:43,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 04:34:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:34:43,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:34:43,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:34:43,831 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 04:34:43,831 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 2 case distinctions, treesize of input 26 treesize of output 33 [2023-08-30 04:34:43,859 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 04:34:43,860 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 [2023-08-30 04:34:43,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:34:43,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:34:43,874 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:34:43,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956233813] [2023-08-30 04:34:43,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956233813] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:34:43,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:34:43,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:34:43,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346589295] [2023-08-30 04:34:43,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:34:43,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:34:43,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:34:43,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:34:43,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:34:43,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 375 [2023-08-30 04:34:43,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 205 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:43,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:34:43,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 375 [2023-08-30 04:34:43,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:34:44,204 INFO L130 PetriNetUnfolder]: 538/976 cut-off events. [2023-08-30 04:34:44,204 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2023-08-30 04:34:44,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2236 conditions, 976 events. 538/976 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 4987 event pairs, 384 based on Foata normal form. 0/501 useless extension candidates. Maximal degree in co-relation 2219. Up to 976 conditions per place. [2023-08-30 04:34:44,209 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 42 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-30 04:34:44,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 287 flow [2023-08-30 04:34:44,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:34:44,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:34:44,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-08-30 04:34:44,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45422222222222225 [2023-08-30 04:34:44,211 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-08-30 04:34:44,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-08-30 04:34:44,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:34:44,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-08-30 04:34:44,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:44,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:44,215 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:44,215 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 205 flow. Second operand 3 states and 511 transitions. [2023-08-30 04:34:44,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 287 flow [2023-08-30 04:34:44,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 281 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 04:34:44,218 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 197 flow [2023-08-30 04:34:44,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2023-08-30 04:34:44,219 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2023-08-30 04:34:44,219 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 197 flow [2023-08-30 04:34:44,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:44,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:34:44,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:34:44,229 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 [2023-08-30 04:34:44,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:34:44,429 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:34:44,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:34:44,430 INFO L85 PathProgramCache]: Analyzing trace with hash 663193647, now seen corresponding path program 1 times [2023-08-30 04:34:44,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:34:44,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706978887] [2023-08-30 04:34:44,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:34:44,430 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:34:44,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:34:44,431 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:34:44,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 04:34:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:34:44,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 04:34:44,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:34:44,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:34:44,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:34:44,561 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 04:34:44,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 04:34:44,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 04:34:44,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:34:44,604 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 [2023-08-30 04:34:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:34:44,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:34:44,658 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:34:44,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706978887] [2023-08-30 04:34:44,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706978887] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:34:44,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:34:44,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:34:44,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486585040] [2023-08-30 04:34:44,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:34:44,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:34:44,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:34:44,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:34:44,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:34:44,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 375 [2023-08-30 04:34:44,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 197 flow. Second operand has 4 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:44,830 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:34:44,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 375 [2023-08-30 04:34:44,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:34:45,053 INFO L130 PetriNetUnfolder]: 484/868 cut-off events. [2023-08-30 04:34:45,054 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 04:34:45,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2006 conditions, 868 events. 484/868 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 4269 event pairs, 342 based on Foata normal form. 0/483 useless extension candidates. Maximal degree in co-relation 1988. Up to 868 conditions per place. [2023-08-30 04:34:45,058 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 40 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-30 04:34:45,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 275 flow [2023-08-30 04:34:45,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:34:45,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:34:45,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 509 transitions. [2023-08-30 04:34:45,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524444444444444 [2023-08-30 04:34:45,061 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 509 transitions. [2023-08-30 04:34:45,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 509 transitions. [2023-08-30 04:34:45,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:34:45,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 509 transitions. [2023-08-30 04:34:45,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:45,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:45,065 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:45,065 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 197 flow. Second operand 3 states and 509 transitions. [2023-08-30 04:34:45,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 275 flow [2023-08-30 04:34:45,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:34:45,068 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 194 flow [2023-08-30 04:34:45,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-08-30 04:34:45,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-08-30 04:34:45,069 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 194 flow [2023-08-30 04:34:45,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:45,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:34:45,070 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 04:34:45,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 04:34:45,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:34:45,279 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:34:45,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:34:45,280 INFO L85 PathProgramCache]: Analyzing trace with hash -930557786, now seen corresponding path program 2 times [2023-08-30 04:34:45,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:34:45,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450694415] [2023-08-30 04:34:45,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:34:45,281 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:34:45,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:34:45,282 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:34:45,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 04:34:45,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 04:34:45,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:34:45,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 04:34:45,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:34:45,422 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 04:34:45,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 04:34:45,561 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:34:45,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:34:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:34:46,127 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:34:46,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450694415] [2023-08-30 04:34:46,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1450694415] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:34:46,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:34:46,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 04:34:46,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830710462] [2023-08-30 04:34:46,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:34:46,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:34:46,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:34:46,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:34:46,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:34:50,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 375 [2023-08-30 04:34:50,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 194 flow. Second operand has 12 states, 12 states have (on average 152.0) internal successors, (1824), 12 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:34:50,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:34:50,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 375 [2023-08-30 04:34:50,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:34:53,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:34:54,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:34:56,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:34:58,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:34:59,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:35:03,923 INFO L130 PetriNetUnfolder]: 1594/2850 cut-off events. [2023-08-30 04:35:03,923 INFO L131 PetriNetUnfolder]: For 181/181 co-relation queries the response was YES. [2023-08-30 04:35:03,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6461 conditions, 2850 events. 1594/2850 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16241 event pairs, 1140 based on Foata normal form. 18/1581 useless extension candidates. Maximal degree in co-relation 6442. Up to 481 conditions per place. [2023-08-30 04:35:03,936 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 215 selfloop transitions, 32 changer transitions 0/247 dead transitions. [2023-08-30 04:35:03,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 247 transitions, 1320 flow [2023-08-30 04:35:03,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 04:35:03,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 04:35:03,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2071 transitions. [2023-08-30 04:35:03,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602222222222222 [2023-08-30 04:35:03,943 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2071 transitions. [2023-08-30 04:35:03,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2071 transitions. [2023-08-30 04:35:03,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:35:03,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2071 transitions. [2023-08-30 04:35:03,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 172.58333333333334) internal successors, (2071), 12 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:03,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 375.0) internal successors, (4875), 13 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:03,955 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 375.0) internal successors, (4875), 13 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:03,955 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 194 flow. Second operand 12 states and 2071 transitions. [2023-08-30 04:35:03,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 247 transitions, 1320 flow [2023-08-30 04:35:03,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 247 transitions, 1319 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:35:03,962 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 438 flow [2023-08-30 04:35:03,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=438, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2023-08-30 04:35:03,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2023-08-30 04:35:03,963 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 438 flow [2023-08-30 04:35:03,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 152.0) internal successors, (1824), 12 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:03,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:35:03,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:35:03,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 04:35:04,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:35:04,174 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:35:04,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:35:04,174 INFO L85 PathProgramCache]: Analyzing trace with hash -930082796, now seen corresponding path program 1 times [2023-08-30 04:35:04,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:35:04,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526107564] [2023-08-30 04:35:04,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:35:04,175 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:35:04,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:35:04,175 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:35:04,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 04:35:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:35:04,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 04:35:04,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:35:04,274 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 [2023-08-30 04:35:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:35:04,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:35:04,337 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:35:04,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526107564] [2023-08-30 04:35:04,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526107564] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:35:04,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:35:04,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:35:04,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337446225] [2023-08-30 04:35:04,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:35:04,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:35:04,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:35:04,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:35:04,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:35:04,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 375 [2023-08-30 04:35:04,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 438 flow. Second operand has 5 states, 5 states have (on average 156.2) internal successors, (781), 5 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:04,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:35:04,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 375 [2023-08-30 04:35:04,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:35:05,481 INFO L130 PetriNetUnfolder]: 2664/4640 cut-off events. [2023-08-30 04:35:05,481 INFO L131 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2023-08-30 04:35:05,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10561 conditions, 4640 events. 2664/4640 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 28299 event pairs, 990 based on Foata normal form. 0/2519 useless extension candidates. Maximal degree in co-relation 10534. Up to 2392 conditions per place. [2023-08-30 04:35:05,518 INFO L137 encePairwiseOnDemand]: 370/375 looper letters, 61 selfloop transitions, 17 changer transitions 0/78 dead transitions. [2023-08-30 04:35:05,518 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 639 flow [2023-08-30 04:35:05,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:35:05,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:35:05,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 821 transitions. [2023-08-30 04:35:05,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4378666666666667 [2023-08-30 04:35:05,522 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 821 transitions. [2023-08-30 04:35:05,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 821 transitions. [2023-08-30 04:35:05,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:35:05,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 821 transitions. [2023-08-30 04:35:05,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 164.2) internal successors, (821), 5 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:05,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:05,529 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:05,529 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 438 flow. Second operand 5 states and 821 transitions. [2023-08-30 04:35:05,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 639 flow [2023-08-30 04:35:05,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 78 transitions, 580 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-30 04:35:05,535 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 424 flow [2023-08-30 04:35:05,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=424, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2023-08-30 04:35:05,536 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2023-08-30 04:35:05,536 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 424 flow [2023-08-30 04:35:05,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.2) internal successors, (781), 5 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:05,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:35:05,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:35:05,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 04:35:05,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:35:05,747 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:35:05,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:35:05,747 INFO L85 PathProgramCache]: Analyzing trace with hash -930082833, now seen corresponding path program 1 times [2023-08-30 04:35:05,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:35:05,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1132470626] [2023-08-30 04:35:05,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:35:05,748 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:35:05,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:35:05,749 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:35:05,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 04:35:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:35:05,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:35:05,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:35:05,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:35:05,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:35:05,900 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:35:05,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1132470626] [2023-08-30 04:35:05,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1132470626] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:35:05,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:35:05,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:35:05,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015103270] [2023-08-30 04:35:05,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:35:05,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:35:05,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:35:05,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:35:05,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:35:06,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 375 [2023-08-30 04:35:06,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 424 flow. Second operand has 5 states, 5 states have (on average 157.2) internal successors, (786), 5 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:06,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:35:06,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 375 [2023-08-30 04:35:06,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:35:06,857 INFO L130 PetriNetUnfolder]: 2465/4321 cut-off events. [2023-08-30 04:35:06,858 INFO L131 PetriNetUnfolder]: For 433/433 co-relation queries the response was YES. [2023-08-30 04:35:06,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10241 conditions, 4321 events. 2465/4321 cut-off events. For 433/433 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 26606 event pairs, 945 based on Foata normal form. 12/2701 useless extension candidates. Maximal degree in co-relation 10212. Up to 2190 conditions per place. [2023-08-30 04:35:06,881 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 78 selfloop transitions, 15 changer transitions 0/93 dead transitions. [2023-08-30 04:35:06,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 93 transitions, 695 flow [2023-08-30 04:35:06,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:35:06,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:35:06,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 844 transitions. [2023-08-30 04:35:06,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45013333333333333 [2023-08-30 04:35:06,886 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 844 transitions. [2023-08-30 04:35:06,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 844 transitions. [2023-08-30 04:35:06,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:35:06,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 844 transitions. [2023-08-30 04:35:06,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 168.8) internal successors, (844), 5 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:06,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:06,892 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:06,892 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 424 flow. Second operand 5 states and 844 transitions. [2023-08-30 04:35:06,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 93 transitions, 695 flow [2023-08-30 04:35:06,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 93 transitions, 665 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:35:06,899 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 456 flow [2023-08-30 04:35:06,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=456, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2023-08-30 04:35:06,901 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2023-08-30 04:35:06,901 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 456 flow [2023-08-30 04:35:06,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 157.2) internal successors, (786), 5 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:06,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:35:06,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:35:06,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 04:35:07,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:35:07,111 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:35:07,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:35:07,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1231541263, now seen corresponding path program 1 times [2023-08-30 04:35:07,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:35:07,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1765883094] [2023-08-30 04:35:07,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:35:07,112 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:35:07,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:35:07,114 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:35:07,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 04:35:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:35:07,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 04:35:07,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:35:07,296 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 04:35:07,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 04:35:07,343 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:35:07,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:35:07,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:35:07,475 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 [2023-08-30 04:35:07,504 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:35:07,505 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 [2023-08-30 04:35:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:35:07,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:35:08,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:35:08,006 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:35:08,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1765883094] [2023-08-30 04:35:08,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1765883094] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:35:08,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:35:08,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 04:35:08,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763300812] [2023-08-30 04:35:08,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:35:08,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:35:08,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:35:08,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:35:08,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:35:10,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 375 [2023-08-30 04:35:10,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 456 flow. Second operand has 8 states, 8 states have (on average 140.75) internal successors, (1126), 8 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:10,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:35:10,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 375 [2023-08-30 04:35:10,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:35:19,569 INFO L130 PetriNetUnfolder]: 4184/7452 cut-off events. [2023-08-30 04:35:19,569 INFO L131 PetriNetUnfolder]: For 1983/1983 co-relation queries the response was YES. [2023-08-30 04:35:19,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18634 conditions, 7452 events. 4184/7452 cut-off events. For 1983/1983 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 53156 event pairs, 1890 based on Foata normal form. 0/4668 useless extension candidates. Maximal degree in co-relation 18603. Up to 1782 conditions per place. [2023-08-30 04:35:19,608 INFO L137 encePairwiseOnDemand]: 364/375 looper letters, 218 selfloop transitions, 44 changer transitions 0/262 dead transitions. [2023-08-30 04:35:19,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 262 transitions, 1795 flow [2023-08-30 04:35:19,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 04:35:19,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 04:35:19,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2442 transitions. [2023-08-30 04:35:19,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.407 [2023-08-30 04:35:19,619 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2442 transitions. [2023-08-30 04:35:19,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2442 transitions. [2023-08-30 04:35:19,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:35:19,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2442 transitions. [2023-08-30 04:35:19,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 152.625) internal successors, (2442), 16 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:19,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 375.0) internal successors, (6375), 17 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:19,649 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 375.0) internal successors, (6375), 17 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:19,649 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 456 flow. Second operand 16 states and 2442 transitions. [2023-08-30 04:35:19,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 262 transitions, 1795 flow [2023-08-30 04:35:19,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 262 transitions, 1750 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-08-30 04:35:19,664 INFO L231 Difference]: Finished difference. Result has 92 places, 90 transitions, 883 flow [2023-08-30 04:35:19,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=883, PETRI_PLACES=92, PETRI_TRANSITIONS=90} [2023-08-30 04:35:19,666 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2023-08-30 04:35:19,666 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 90 transitions, 883 flow [2023-08-30 04:35:19,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 140.75) internal successors, (1126), 8 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:19,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:35:19,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:35:19,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 04:35:19,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:35:19,877 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:35:19,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:35:19,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1231541262, now seen corresponding path program 1 times [2023-08-30 04:35:19,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:35:19,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927529082] [2023-08-30 04:35:19,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:35:19,878 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:35:19,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:35:19,880 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:35:19,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 04:35:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:35:19,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 04:35:19,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:35:20,022 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:35:20,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:35:20,052 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 04:35:20,052 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 [2023-08-30 04:35:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 04:35:20,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:35:20,063 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:35:20,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927529082] [2023-08-30 04:35:20,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927529082] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:35:20,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:35:20,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:35:20,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057656943] [2023-08-30 04:35:20,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:35:20,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:35:20,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:35:20,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:35:20,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:35:20,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 375 [2023-08-30 04:35:20,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 90 transitions, 883 flow. Second operand has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:20,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:35:20,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 375 [2023-08-30 04:35:20,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:35:20,914 INFO L130 PetriNetUnfolder]: 2924/5294 cut-off events. [2023-08-30 04:35:20,914 INFO L131 PetriNetUnfolder]: For 8001/8001 co-relation queries the response was YES. [2023-08-30 04:35:20,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15244 conditions, 5294 events. 2924/5294 cut-off events. For 8001/8001 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 34965 event pairs, 2004 based on Foata normal form. 370/4302 useless extension candidates. Maximal degree in co-relation 15200. Up to 5281 conditions per place. [2023-08-30 04:35:20,953 INFO L137 encePairwiseOnDemand]: 371/375 looper letters, 76 selfloop transitions, 12 changer transitions 0/88 dead transitions. [2023-08-30 04:35:20,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 88 transitions, 1051 flow [2023-08-30 04:35:20,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:35:20,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:35:20,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 639 transitions. [2023-08-30 04:35:20,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.426 [2023-08-30 04:35:20,956 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 639 transitions. [2023-08-30 04:35:20,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 639 transitions. [2023-08-30 04:35:20,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:35:20,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 639 transitions. [2023-08-30 04:35:20,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 159.75) internal successors, (639), 4 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:20,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:20,960 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:20,960 INFO L175 Difference]: Start difference. First operand has 92 places, 90 transitions, 883 flow. Second operand 4 states and 639 transitions. [2023-08-30 04:35:20,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 88 transitions, 1051 flow [2023-08-30 04:35:21,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 88 transitions, 1041 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-30 04:35:21,064 INFO L231 Difference]: Finished difference. Result has 93 places, 88 transitions, 889 flow [2023-08-30 04:35:21,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=889, PETRI_PLACES=93, PETRI_TRANSITIONS=88} [2023-08-30 04:35:21,065 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2023-08-30 04:35:21,065 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 88 transitions, 889 flow [2023-08-30 04:35:21,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:21,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:35:21,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:35:21,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 04:35:21,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:35:21,278 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:35:21,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:35:21,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1673948147, now seen corresponding path program 1 times [2023-08-30 04:35:21,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:35:21,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043763991] [2023-08-30 04:35:21,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:35:21,279 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:35:21,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:35:21,280 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:35:21,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 04:35:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:35:21,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:35:21,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:35:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:35:21,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:35:21,418 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:35:21,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043763991] [2023-08-30 04:35:21,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043763991] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:35:21,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:35:21,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:35:21,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877150302] [2023-08-30 04:35:21,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:35:21,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:35:21,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:35:21,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:35:21,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:35:21,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 375 [2023-08-30 04:35:21,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 88 transitions, 889 flow. Second operand has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:21,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:35:21,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 375 [2023-08-30 04:35:21,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:35:22,209 INFO L130 PetriNetUnfolder]: 2744/4994 cut-off events. [2023-08-30 04:35:22,210 INFO L131 PetriNetUnfolder]: For 8348/8348 co-relation queries the response was YES. [2023-08-30 04:35:22,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14474 conditions, 4994 events. 2744/4994 cut-off events. For 8348/8348 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 33198 event pairs, 1884 based on Foata normal form. 0/3812 useless extension candidates. Maximal degree in co-relation 14428. Up to 4700 conditions per place. [2023-08-30 04:35:22,234 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 107 selfloop transitions, 3 changer transitions 0/110 dead transitions. [2023-08-30 04:35:22,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 110 transitions, 1271 flow [2023-08-30 04:35:22,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:35:22,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:35:22,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 671 transitions. [2023-08-30 04:35:22,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44733333333333336 [2023-08-30 04:35:22,237 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 671 transitions. [2023-08-30 04:35:22,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 671 transitions. [2023-08-30 04:35:22,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:35:22,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 671 transitions. [2023-08-30 04:35:22,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:22,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:22,241 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:22,241 INFO L175 Difference]: Start difference. First operand has 93 places, 88 transitions, 889 flow. Second operand 4 states and 671 transitions. [2023-08-30 04:35:22,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 110 transitions, 1271 flow [2023-08-30 04:35:22,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 110 transitions, 1258 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:35:22,278 INFO L231 Difference]: Finished difference. Result has 95 places, 88 transitions, 889 flow [2023-08-30 04:35:22,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=889, PETRI_PLACES=95, PETRI_TRANSITIONS=88} [2023-08-30 04:35:22,279 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2023-08-30 04:35:22,279 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 88 transitions, 889 flow [2023-08-30 04:35:22,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:22,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:35:22,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:35:22,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 04:35:22,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:35:22,493 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:35:22,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:35:22,493 INFO L85 PathProgramCache]: Analyzing trace with hash -456307222, now seen corresponding path program 1 times [2023-08-30 04:35:22,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:35:22,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1461717180] [2023-08-30 04:35:22,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:35:22,494 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:35:22,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:35:22,495 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:35:22,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 04:35:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:35:22,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 04:35:22,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:35:22,577 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 [2023-08-30 04:35:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:35:22,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:35:22,646 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:35:22,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1461717180] [2023-08-30 04:35:22,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1461717180] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:35:22,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:35:22,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:35:22,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979647341] [2023-08-30 04:35:22,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:35:22,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:35:22,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:35:22,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:35:22,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:35:22,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 375 [2023-08-30 04:35:22,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 88 transitions, 889 flow. Second operand has 5 states, 5 states have (on average 156.6) internal successors, (783), 5 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:22,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:35:22,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 375 [2023-08-30 04:35:22,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:35:24,033 INFO L130 PetriNetUnfolder]: 4457/7989 cut-off events. [2023-08-30 04:35:24,033 INFO L131 PetriNetUnfolder]: For 14996/14996 co-relation queries the response was YES. [2023-08-30 04:35:24,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24645 conditions, 7989 events. 4457/7989 cut-off events. For 14996/14996 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 57603 event pairs, 1403 based on Foata normal form. 0/6807 useless extension candidates. Maximal degree in co-relation 24598. Up to 4355 conditions per place. [2023-08-30 04:35:24,070 INFO L137 encePairwiseOnDemand]: 370/375 looper letters, 81 selfloop transitions, 29 changer transitions 0/110 dead transitions. [2023-08-30 04:35:24,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 110 transitions, 1247 flow [2023-08-30 04:35:24,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:35:24,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:35:24,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 815 transitions. [2023-08-30 04:35:24,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43466666666666665 [2023-08-30 04:35:24,073 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 815 transitions. [2023-08-30 04:35:24,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 815 transitions. [2023-08-30 04:35:24,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:35:24,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 815 transitions. [2023-08-30 04:35:24,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:24,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:24,078 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:24,078 INFO L175 Difference]: Start difference. First operand has 95 places, 88 transitions, 889 flow. Second operand 5 states and 815 transitions. [2023-08-30 04:35:24,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 110 transitions, 1247 flow [2023-08-30 04:35:24,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 110 transitions, 1242 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:35:24,115 INFO L231 Difference]: Finished difference. Result has 98 places, 89 transitions, 967 flow [2023-08-30 04:35:24,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=967, PETRI_PLACES=98, PETRI_TRANSITIONS=89} [2023-08-30 04:35:24,116 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2023-08-30 04:35:24,116 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 89 transitions, 967 flow [2023-08-30 04:35:24,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.6) internal successors, (783), 5 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:24,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:35:24,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:35:24,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 04:35:24,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:35:24,326 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:35:24,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:35:24,327 INFO L85 PathProgramCache]: Analyzing trace with hash -456307189, now seen corresponding path program 1 times [2023-08-30 04:35:24,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:35:24,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594668363] [2023-08-30 04:35:24,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:35:24,327 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:35:24,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:35:24,329 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:35:24,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 04:35:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:35:24,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:35:24,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:35:24,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:35:24,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:35:24,499 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:35:24,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [594668363] [2023-08-30 04:35:24,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [594668363] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:35:24,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:35:24,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:35:24,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278878767] [2023-08-30 04:35:24,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:35:24,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:35:24,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:35:24,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:35:24,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:35:24,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 375 [2023-08-30 04:35:24,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 89 transitions, 967 flow. Second operand has 5 states, 5 states have (on average 157.6) internal successors, (788), 5 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:24,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:35:24,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 375 [2023-08-30 04:35:24,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:35:25,694 INFO L130 PetriNetUnfolder]: 4349/7785 cut-off events. [2023-08-30 04:35:25,695 INFO L131 PetriNetUnfolder]: For 17038/17038 co-relation queries the response was YES. [2023-08-30 04:35:25,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25706 conditions, 7785 events. 4349/7785 cut-off events. For 17038/17038 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 55303 event pairs, 1385 based on Foata normal form. 36/7445 useless extension candidates. Maximal degree in co-relation 25658. Up to 4187 conditions per place. [2023-08-30 04:35:25,749 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 101 selfloop transitions, 19 changer transitions 0/120 dead transitions. [2023-08-30 04:35:25,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 120 transitions, 1365 flow [2023-08-30 04:35:25,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:35:25,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:35:25,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 833 transitions. [2023-08-30 04:35:25,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44426666666666664 [2023-08-30 04:35:25,752 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 833 transitions. [2023-08-30 04:35:25,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 833 transitions. [2023-08-30 04:35:25,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:35:25,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 833 transitions. [2023-08-30 04:35:25,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 166.6) internal successors, (833), 5 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:25,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:25,756 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:25,757 INFO L175 Difference]: Start difference. First operand has 98 places, 89 transitions, 967 flow. Second operand 5 states and 833 transitions. [2023-08-30 04:35:25,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 120 transitions, 1365 flow [2023-08-30 04:35:25,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 120 transitions, 1324 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:35:25,801 INFO L231 Difference]: Finished difference. Result has 100 places, 89 transitions, 969 flow [2023-08-30 04:35:25,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=969, PETRI_PLACES=100, PETRI_TRANSITIONS=89} [2023-08-30 04:35:25,802 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2023-08-30 04:35:25,802 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 89 transitions, 969 flow [2023-08-30 04:35:25,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 157.6) internal successors, (788), 5 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:25,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:35:25,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:35:25,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 04:35:26,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:35:26,012 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:35:26,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:35:26,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1899722197, now seen corresponding path program 1 times [2023-08-30 04:35:26,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:35:26,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845976209] [2023-08-30 04:35:26,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:35:26,013 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:35:26,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:35:26,014 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:35:26,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 04:35:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:35:26,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 04:35:26,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:35:26,204 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 04:35:26,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 04:35:26,252 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:35:26,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:35:26,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:35:26,359 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 [2023-08-30 04:35:26,366 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:35:26,367 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 [2023-08-30 04:35:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:35:26,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:35:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:35:30,841 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:35:30,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845976209] [2023-08-30 04:35:30,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845976209] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:35:30,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:35:30,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 04:35:30,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256307793] [2023-08-30 04:35:30,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:35:30,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:35:30,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:35:30,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:35:30,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:35:34,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 375 [2023-08-30 04:35:34,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 89 transitions, 969 flow. Second operand has 8 states, 8 states have (on average 141.25) internal successors, (1130), 8 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:34,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:35:34,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 375 [2023-08-30 04:35:34,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:35:40,422 WARN L222 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 35 DAG size of output: 34 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 04:35:49,850 INFO L130 PetriNetUnfolder]: 5581/10107 cut-off events. [2023-08-30 04:35:49,850 INFO L131 PetriNetUnfolder]: For 25690/25690 co-relation queries the response was YES. [2023-08-30 04:35:49,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34153 conditions, 10107 events. 5581/10107 cut-off events. For 25690/25690 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 76403 event pairs, 2389 based on Foata normal form. 448/10139 useless extension candidates. Maximal degree in co-relation 34104. Up to 4563 conditions per place. [2023-08-30 04:35:49,943 INFO L137 encePairwiseOnDemand]: 366/375 looper letters, 207 selfloop transitions, 40 changer transitions 0/247 dead transitions. [2023-08-30 04:35:49,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 247 transitions, 2302 flow [2023-08-30 04:35:49,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 04:35:49,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 04:35:49,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2402 transitions. [2023-08-30 04:35:49,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4003333333333333 [2023-08-30 04:35:49,951 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2402 transitions. [2023-08-30 04:35:49,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2402 transitions. [2023-08-30 04:35:49,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:35:49,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2402 transitions. [2023-08-30 04:35:49,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 150.125) internal successors, (2402), 16 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:49,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 375.0) internal successors, (6375), 17 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:49,964 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 375.0) internal successors, (6375), 17 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:49,964 INFO L175 Difference]: Start difference. First operand has 100 places, 89 transitions, 969 flow. Second operand 16 states and 2402 transitions. [2023-08-30 04:35:49,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 247 transitions, 2302 flow [2023-08-30 04:35:50,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 247 transitions, 2277 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:35:50,017 INFO L231 Difference]: Finished difference. Result has 118 places, 94 transitions, 1098 flow [2023-08-30 04:35:50,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1098, PETRI_PLACES=118, PETRI_TRANSITIONS=94} [2023-08-30 04:35:50,018 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2023-08-30 04:35:50,018 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 94 transitions, 1098 flow [2023-08-30 04:35:50,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 141.25) internal successors, (1130), 8 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:50,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:35:50,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:35:50,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 04:35:50,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:35:50,221 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:35:50,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:35:50,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1899766056, now seen corresponding path program 1 times [2023-08-30 04:35:50,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:35:50,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275602409] [2023-08-30 04:35:50,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:35:50,222 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:35:50,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:35:50,223 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:35:50,226 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 (20)] Waiting until timeout for monitored process [2023-08-30 04:35:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:35:50,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 04:35:50,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:35:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:35:50,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:35:50,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:35:50,529 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:35:50,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275602409] [2023-08-30 04:35:50,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275602409] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:35:50,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:35:50,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 04:35:50,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545359597] [2023-08-30 04:35:50,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:35:50,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 04:35:50,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:35:50,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 04:35:50,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-08-30 04:35:51,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 375 [2023-08-30 04:35:51,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 94 transitions, 1098 flow. Second operand has 10 states, 10 states have (on average 153.8) internal successors, (1538), 10 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:51,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:35:51,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 375 [2023-08-30 04:35:51,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:35:52,942 INFO L130 PetriNetUnfolder]: 5123/9387 cut-off events. [2023-08-30 04:35:52,942 INFO L131 PetriNetUnfolder]: For 35724/35724 co-relation queries the response was YES. [2023-08-30 04:35:52,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35022 conditions, 9387 events. 5123/9387 cut-off events. For 35724/35724 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 70846 event pairs, 1809 based on Foata normal form. 402/9789 useless extension candidates. Maximal degree in co-relation 34967. Up to 3858 conditions per place. [2023-08-30 04:35:53,007 INFO L137 encePairwiseOnDemand]: 365/375 looper letters, 146 selfloop transitions, 22 changer transitions 0/168 dead transitions. [2023-08-30 04:35:53,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 168 transitions, 1888 flow [2023-08-30 04:35:53,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 04:35:53,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 04:35:53,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1460 transitions. [2023-08-30 04:35:53,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325925925925926 [2023-08-30 04:35:53,011 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1460 transitions. [2023-08-30 04:35:53,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1460 transitions. [2023-08-30 04:35:53,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:35:53,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1460 transitions. [2023-08-30 04:35:53,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 162.22222222222223) internal successors, (1460), 9 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:53,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:53,017 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:53,017 INFO L175 Difference]: Start difference. First operand has 118 places, 94 transitions, 1098 flow. Second operand 9 states and 1460 transitions. [2023-08-30 04:35:53,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 168 transitions, 1888 flow [2023-08-30 04:35:53,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 168 transitions, 1815 flow, removed 8 selfloop flow, removed 8 redundant places. [2023-08-30 04:35:53,093 INFO L231 Difference]: Finished difference. Result has 120 places, 95 transitions, 1162 flow [2023-08-30 04:35:53,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1162, PETRI_PLACES=120, PETRI_TRANSITIONS=95} [2023-08-30 04:35:53,093 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2023-08-30 04:35:53,093 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 95 transitions, 1162 flow [2023-08-30 04:35:53,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 153.8) internal successors, (1538), 10 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:35:53,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:35:53,094 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:35:53,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 04:35:53,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:35:53,295 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:35:53,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:35:53,296 INFO L85 PathProgramCache]: Analyzing trace with hash -375743760, now seen corresponding path program 2 times [2023-08-30 04:35:53,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:35:53,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921520967] [2023-08-30 04:35:53,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:35:53,296 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:35:53,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:35:53,297 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:35:53,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 04:35:53,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 04:35:53,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:35:53,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 04:35:53,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:35:53,470 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:35:53,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 04:35:53,511 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:35:53,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:35:53,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:35:53,578 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 [2023-08-30 04:35:53,587 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:35:53,588 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 [2023-08-30 04:35:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:35:53,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:35:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:35:54,288 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:35:54,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921520967] [2023-08-30 04:35:54,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921520967] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:35:54,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:35:54,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 04:35:54,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771665319] [2023-08-30 04:35:54,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:35:54,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:35:54,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:35:54,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:35:54,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:35:56,616 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] [2023-08-30 04:36:01,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 375 [2023-08-30 04:36:01,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 95 transitions, 1162 flow. Second operand has 12 states, 12 states have (on average 143.66666666666666) internal successors, (1724), 12 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:01,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:36:01,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 375 [2023-08-30 04:36:01,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:36:05,357 INFO L130 PetriNetUnfolder]: 6809/12639 cut-off events. [2023-08-30 04:36:05,357 INFO L131 PetriNetUnfolder]: For 53633/53633 co-relation queries the response was YES. [2023-08-30 04:36:05,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46574 conditions, 12639 events. 6809/12639 cut-off events. For 53633/53633 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 101637 event pairs, 1446 based on Foata normal form. 342/12981 useless extension candidates. Maximal degree in co-relation 46517. Up to 2792 conditions per place. [2023-08-30 04:36:05,446 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 249 selfloop transitions, 31 changer transitions 0/280 dead transitions. [2023-08-30 04:36:05,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 280 transitions, 2656 flow [2023-08-30 04:36:05,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 04:36:05,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 04:36:05,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2192 transitions. [2023-08-30 04:36:05,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175238095238095 [2023-08-30 04:36:05,450 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2192 transitions. [2023-08-30 04:36:05,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2192 transitions. [2023-08-30 04:36:05,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:36:05,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2192 transitions. [2023-08-30 04:36:05,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 156.57142857142858) internal successors, (2192), 14 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:05,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 375.0) internal successors, (5625), 15 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:05,457 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 375.0) internal successors, (5625), 15 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:05,457 INFO L175 Difference]: Start difference. First operand has 120 places, 95 transitions, 1162 flow. Second operand 14 states and 2192 transitions. [2023-08-30 04:36:05,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 280 transitions, 2656 flow [2023-08-30 04:36:05,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 280 transitions, 2633 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-30 04:36:05,545 INFO L231 Difference]: Finished difference. Result has 137 places, 102 transitions, 1322 flow [2023-08-30 04:36:05,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1322, PETRI_PLACES=137, PETRI_TRANSITIONS=102} [2023-08-30 04:36:05,545 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2023-08-30 04:36:05,546 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 102 transitions, 1322 flow [2023-08-30 04:36:05,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 143.66666666666666) internal successors, (1724), 12 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:05,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:36:05,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:36:05,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 04:36:05,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:36:05,757 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:36:05,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:36:05,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1238156902, now seen corresponding path program 1 times [2023-08-30 04:36:05,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:36:05,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1953859640] [2023-08-30 04:36:05,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:36:05,758 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:36:05,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:36:05,759 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:36:05,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 04:36:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:36:05,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 04:36:05,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:36:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:36:05,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:36:06,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:36:06,096 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:36:06,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1953859640] [2023-08-30 04:36:06,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1953859640] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:36:06,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:36:06,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 04:36:06,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475455822] [2023-08-30 04:36:06,097 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:36:06,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 04:36:06,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:36:06,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 04:36:06,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-08-30 04:36:06,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 375 [2023-08-30 04:36:06,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 102 transitions, 1322 flow. Second operand has 10 states, 10 states have (on average 154.0) internal successors, (1540), 10 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:06,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:36:06,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 375 [2023-08-30 04:36:06,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:36:09,025 INFO L130 PetriNetUnfolder]: 6163/11591 cut-off events. [2023-08-30 04:36:09,025 INFO L131 PetriNetUnfolder]: For 55833/55833 co-relation queries the response was YES. [2023-08-30 04:36:09,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45683 conditions, 11591 events. 6163/11591 cut-off events. For 55833/55833 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 92790 event pairs, 2619 based on Foata normal form. 486/12077 useless extension candidates. Maximal degree in co-relation 45618. Up to 4963 conditions per place. [2023-08-30 04:36:09,100 INFO L137 encePairwiseOnDemand]: 366/375 looper letters, 149 selfloop transitions, 23 changer transitions 0/172 dead transitions. [2023-08-30 04:36:09,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 172 transitions, 2122 flow [2023-08-30 04:36:09,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 04:36:09,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 04:36:09,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1454 transitions. [2023-08-30 04:36:09,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4308148148148148 [2023-08-30 04:36:09,104 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1454 transitions. [2023-08-30 04:36:09,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1454 transitions. [2023-08-30 04:36:09,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:36:09,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1454 transitions. [2023-08-30 04:36:09,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 161.55555555555554) internal successors, (1454), 9 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:09,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:09,109 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:09,110 INFO L175 Difference]: Start difference. First operand has 137 places, 102 transitions, 1322 flow. Second operand 9 states and 1454 transitions. [2023-08-30 04:36:09,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 172 transitions, 2122 flow [2023-08-30 04:36:09,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 172 transitions, 2023 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-08-30 04:36:09,338 INFO L231 Difference]: Finished difference. Result has 139 places, 101 transitions, 1287 flow [2023-08-30 04:36:09,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1232, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1287, PETRI_PLACES=139, PETRI_TRANSITIONS=101} [2023-08-30 04:36:09,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2023-08-30 04:36:09,339 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 101 transitions, 1287 flow [2023-08-30 04:36:09,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 154.0) internal successors, (1540), 10 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:09,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:36:09,339 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:36:09,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-08-30 04:36:09,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:36:09,540 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:36:09,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:36:09,540 INFO L85 PathProgramCache]: Analyzing trace with hash -375743723, now seen corresponding path program 1 times [2023-08-30 04:36:09,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:36:09,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [443153236] [2023-08-30 04:36:09,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:36:09,541 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:36:09,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:36:09,542 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:36:09,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 04:36:09,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:36:09,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 04:36:09,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:36:09,655 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 [2023-08-30 04:36:09,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 04:36:09,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:36:10,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 04:36:10,362 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:36:10,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [443153236] [2023-08-30 04:36:10,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [443153236] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:36:10,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:36:10,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 04:36:10,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468847817] [2023-08-30 04:36:10,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:36:10,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:36:10,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:36:10,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:36:10,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:36:13,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 375 [2023-08-30 04:36:13,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 101 transitions, 1287 flow. Second operand has 12 states, 12 states have (on average 152.5) internal successors, (1830), 12 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:13,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:36:13,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 375 [2023-08-30 04:36:13,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:36:16,755 INFO L130 PetriNetUnfolder]: 9133/16901 cut-off events. [2023-08-30 04:36:16,756 INFO L131 PetriNetUnfolder]: For 101645/101645 co-relation queries the response was YES. [2023-08-30 04:36:16,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72173 conditions, 16901 events. 9133/16901 cut-off events. For 101645/101645 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 136553 event pairs, 468 based on Foata normal form. 594/17495 useless extension candidates. Maximal degree in co-relation 72110. Up to 3339 conditions per place. [2023-08-30 04:36:16,860 INFO L137 encePairwiseOnDemand]: 366/375 looper letters, 138 selfloop transitions, 50 changer transitions 0/188 dead transitions. [2023-08-30 04:36:16,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 188 transitions, 2236 flow [2023-08-30 04:36:16,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 04:36:16,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 04:36:16,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1461 transitions. [2023-08-30 04:36:16,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4328888888888889 [2023-08-30 04:36:16,862 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1461 transitions. [2023-08-30 04:36:16,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1461 transitions. [2023-08-30 04:36:16,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:36:16,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1461 transitions. [2023-08-30 04:36:16,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 162.33333333333334) internal successors, (1461), 9 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:16,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:16,866 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:16,866 INFO L175 Difference]: Start difference. First operand has 139 places, 101 transitions, 1287 flow. Second operand 9 states and 1461 transitions. [2023-08-30 04:36:16,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 188 transitions, 2236 flow [2023-08-30 04:36:17,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 188 transitions, 2220 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:36:17,014 INFO L231 Difference]: Finished difference. Result has 148 places, 113 transitions, 1565 flow [2023-08-30 04:36:17,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1265, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1565, PETRI_PLACES=148, PETRI_TRANSITIONS=113} [2023-08-30 04:36:17,015 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2023-08-30 04:36:17,015 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 113 transitions, 1565 flow [2023-08-30 04:36:17,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 152.5) internal successors, (1830), 12 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:17,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:36:17,016 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:36:17,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 04:36:17,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:36:17,221 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:36:17,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:36:17,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1238207822, now seen corresponding path program 2 times [2023-08-30 04:36:17,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:36:17,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803920240] [2023-08-30 04:36:17,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:36:17,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:36:17,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:36:17,222 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:36:17,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 04:36:17,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 04:36:17,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:36:17,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 04:36:17,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:36:17,381 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:36:17,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 04:36:17,417 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:36:17,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:36:17,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:36:17,489 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 [2023-08-30 04:36:17,498 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:36:17,500 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 [2023-08-30 04:36:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:36:17,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:36:20,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:36:20,255 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:36:20,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803920240] [2023-08-30 04:36:20,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803920240] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:36:20,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:36:20,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 04:36:20,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873825213] [2023-08-30 04:36:20,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:36:20,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:36:20,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:36:20,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:36:20,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:36:23,279 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] [2023-08-30 04:36:25,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:36:27,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:36:30,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:36:33,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:36:36,343 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] [2023-08-30 04:36:38,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 375 [2023-08-30 04:36:38,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 113 transitions, 1565 flow. Second operand has 12 states, 12 states have (on average 140.83333333333334) internal successors, (1690), 12 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:38,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:36:38,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 375 [2023-08-30 04:36:38,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:36:42,901 INFO L130 PetriNetUnfolder]: 10870/20006 cut-off events. [2023-08-30 04:36:42,901 INFO L131 PetriNetUnfolder]: For 151467/151467 co-relation queries the response was YES. [2023-08-30 04:36:42,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88467 conditions, 20006 events. 10870/20006 cut-off events. For 151467/151467 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 170683 event pairs, 3168 based on Foata normal form. 1170/21176 useless extension candidates. Maximal degree in co-relation 88399. Up to 7205 conditions per place. [2023-08-30 04:36:43,053 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 229 selfloop transitions, 35 changer transitions 0/264 dead transitions. [2023-08-30 04:36:43,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 264 transitions, 3188 flow [2023-08-30 04:36:43,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 04:36:43,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 04:36:43,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1688 transitions. [2023-08-30 04:36:43,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092121212121212 [2023-08-30 04:36:43,057 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1688 transitions. [2023-08-30 04:36:43,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1688 transitions. [2023-08-30 04:36:43,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:36:43,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1688 transitions. [2023-08-30 04:36:43,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 153.45454545454547) internal successors, (1688), 11 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:43,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 375.0) internal successors, (4500), 12 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:43,061 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 375.0) internal successors, (4500), 12 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:43,062 INFO L175 Difference]: Start difference. First operand has 148 places, 113 transitions, 1565 flow. Second operand 11 states and 1688 transitions. [2023-08-30 04:36:43,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 264 transitions, 3188 flow [2023-08-30 04:36:43,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 264 transitions, 3101 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-08-30 04:36:43,341 INFO L231 Difference]: Finished difference. Result has 158 places, 118 transitions, 1652 flow [2023-08-30 04:36:43,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1481, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1652, PETRI_PLACES=158, PETRI_TRANSITIONS=118} [2023-08-30 04:36:43,342 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2023-08-30 04:36:43,342 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 118 transitions, 1652 flow [2023-08-30 04:36:43,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 140.83333333333334) internal successors, (1690), 12 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:43,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:36:43,343 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:36:43,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 04:36:43,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:36:43,544 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:36:43,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:36:43,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1238207789, now seen corresponding path program 1 times [2023-08-30 04:36:43,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:36:43,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1205259005] [2023-08-30 04:36:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:36:43,544 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:36:43,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:36:43,545 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:36:43,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 04:36:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:36:43,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 04:36:43,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:36:43,679 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 [2023-08-30 04:36:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 04:36:43,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:36:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 04:36:44,376 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:36:44,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1205259005] [2023-08-30 04:36:44,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1205259005] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:36:44,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:36:44,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 04:36:44,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867098647] [2023-08-30 04:36:44,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:36:44,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 04:36:44,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:36:44,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 04:36:44,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-08-30 04:36:46,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 375 [2023-08-30 04:36:46,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 118 transitions, 1652 flow. Second operand has 10 states, 10 states have (on average 155.0) internal successors, (1550), 10 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:46,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:36:46,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 375 [2023-08-30 04:36:46,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:36:52,016 INFO L130 PetriNetUnfolder]: 14848/26684 cut-off events. [2023-08-30 04:36:52,017 INFO L131 PetriNetUnfolder]: For 214103/214103 co-relation queries the response was YES. [2023-08-30 04:36:52,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132024 conditions, 26684 events. 14848/26684 cut-off events. For 214103/214103 co-relation queries the response was YES. Maximal size of possible extension queue 996. Compared 225949 event pairs, 3168 based on Foata normal form. 1782/28466 useless extension candidates. Maximal degree in co-relation 131952. Up to 7604 conditions per place. [2023-08-30 04:36:52,278 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 162 selfloop transitions, 49 changer transitions 0/211 dead transitions. [2023-08-30 04:36:52,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 211 transitions, 3003 flow [2023-08-30 04:36:52,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 04:36:52,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 04:36:52,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1459 transitions. [2023-08-30 04:36:52,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4322962962962963 [2023-08-30 04:36:52,282 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1459 transitions. [2023-08-30 04:36:52,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1459 transitions. [2023-08-30 04:36:52,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:36:52,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1459 transitions. [2023-08-30 04:36:52,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 162.11111111111111) internal successors, (1459), 9 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:52,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:52,286 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:52,286 INFO L175 Difference]: Start difference. First operand has 158 places, 118 transitions, 1652 flow. Second operand 9 states and 1459 transitions. [2023-08-30 04:36:52,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 211 transitions, 3003 flow [2023-08-30 04:36:53,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 211 transitions, 2915 flow, removed 11 selfloop flow, removed 5 redundant places. [2023-08-30 04:36:53,025 INFO L231 Difference]: Finished difference. Result has 165 places, 121 transitions, 1744 flow [2023-08-30 04:36:53,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1568, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1744, PETRI_PLACES=165, PETRI_TRANSITIONS=121} [2023-08-30 04:36:53,026 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2023-08-30 04:36:53,026 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 121 transitions, 1744 flow [2023-08-30 04:36:53,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 155.0) internal successors, (1550), 10 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:53,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:36:53,026 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:36:53,034 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 (25)] Ended with exit code 0 [2023-08-30 04:36:53,226 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 [2023-08-30 04:36:53,227 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:36:53,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:36:53,227 INFO L85 PathProgramCache]: Analyzing trace with hash -270260317, now seen corresponding path program 3 times [2023-08-30 04:36:53,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:36:53,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431892802] [2023-08-30 04:36:53,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 04:36:53,228 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:36:53,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:36:53,229 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) [2023-08-30 04:36:53,230 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 [2023-08-30 04:36:53,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 04:36:53,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:36:53,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 04:36:53,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:36:53,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 04:36:53,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:36:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:36:53,640 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:36:53,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431892802] [2023-08-30 04:36:53,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431892802] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:36:53,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:36:53,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-08-30 04:36:53,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81282092] [2023-08-30 04:36:53,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:36:53,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 04:36:53,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:36:53,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 04:36:53,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-08-30 04:36:54,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 375 [2023-08-30 04:36:54,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 121 transitions, 1744 flow. Second operand has 13 states, 13 states have (on average 153.69230769230768) internal successors, (1998), 13 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:54,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:36:54,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 375 [2023-08-30 04:36:54,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:36:59,369 INFO L130 PetriNetUnfolder]: 13870/25058 cut-off events. [2023-08-30 04:36:59,369 INFO L131 PetriNetUnfolder]: For 230789/230789 co-relation queries the response was YES. [2023-08-30 04:36:59,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127487 conditions, 25058 events. 13870/25058 cut-off events. For 230789/230789 co-relation queries the response was YES. Maximal size of possible extension queue 927. Compared 212611 event pairs, 3168 based on Foata normal form. 66/25124 useless extension candidates. Maximal degree in co-relation 127412. Up to 13009 conditions per place. [2023-08-30 04:36:59,597 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 156 selfloop transitions, 59 changer transitions 0/215 dead transitions. [2023-08-30 04:36:59,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 215 transitions, 2997 flow [2023-08-30 04:36:59,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 04:36:59,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 04:36:59,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1766 transitions. [2023-08-30 04:36:59,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281212121212121 [2023-08-30 04:36:59,601 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1766 transitions. [2023-08-30 04:36:59,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1766 transitions. [2023-08-30 04:36:59,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:36:59,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1766 transitions. [2023-08-30 04:36:59,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 160.54545454545453) internal successors, (1766), 11 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:59,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 375.0) internal successors, (4500), 12 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:59,605 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 375.0) internal successors, (4500), 12 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:36:59,605 INFO L175 Difference]: Start difference. First operand has 165 places, 121 transitions, 1744 flow. Second operand 11 states and 1766 transitions. [2023-08-30 04:36:59,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 215 transitions, 2997 flow [2023-08-30 04:37:00,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 215 transitions, 2870 flow, removed 13 selfloop flow, removed 6 redundant places. [2023-08-30 04:37:00,869 INFO L231 Difference]: Finished difference. Result has 169 places, 123 transitions, 1796 flow [2023-08-30 04:37:00,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1796, PETRI_PLACES=169, PETRI_TRANSITIONS=123} [2023-08-30 04:37:00,870 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2023-08-30 04:37:00,870 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 123 transitions, 1796 flow [2023-08-30 04:37:00,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 153.69230769230768) internal successors, (1998), 13 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:37:00,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:37:00,871 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 04:37:00,879 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 (26)] Ended with exit code 0 [2023-08-30 04:37:01,072 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 [2023-08-30 04:37:01,073 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:37:01,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:37:01,073 INFO L85 PathProgramCache]: Analyzing trace with hash -312446599, now seen corresponding path program 3 times [2023-08-30 04:37:01,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:37:01,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64374815] [2023-08-30 04:37:01,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 04:37:01,074 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:37:01,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:37:01,075 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) [2023-08-30 04:37:01,076 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 [2023-08-30 04:37:01,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 04:37:01,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:37:01,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 04:37:01,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:37:01,263 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 04:37:01,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 04:37:01,300 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:37:01,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:37:01,423 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-08-30 04:37:01,423 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 21 treesize of output 25 [2023-08-30 04:37:01,461 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:37:01,461 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 [2023-08-30 04:37:02,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 04:37:02,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:37:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 04:37:08,093 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:37:08,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [64374815] [2023-08-30 04:37:08,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [64374815] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:37:08,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:37:08,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-30 04:37:08,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508376880] [2023-08-30 04:37:08,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:37:08,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 04:37:08,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:37:08,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 04:37:08,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-08-30 04:37:58,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 375 [2023-08-30 04:37:58,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 123 transitions, 1796 flow. Second operand has 16 states, 16 states have (on average 135.375) internal successors, (2166), 16 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:37:58,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:37:58,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 375 [2023-08-30 04:37:58,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:38:07,222 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 [1] [2023-08-30 04:38:30,750 INFO L130 PetriNetUnfolder]: 14552/26587 cut-off events. [2023-08-30 04:38:30,751 INFO L131 PetriNetUnfolder]: For 228911/228911 co-relation queries the response was YES. [2023-08-30 04:38:30,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126512 conditions, 26587 events. 14552/26587 cut-off events. For 228911/228911 co-relation queries the response was YES. Maximal size of possible extension queue 1011. Compared 231034 event pairs, 7047 based on Foata normal form. 68/26655 useless extension candidates. Maximal degree in co-relation 126438. Up to 7111 conditions per place. [2023-08-30 04:38:30,988 INFO L137 encePairwiseOnDemand]: 363/375 looper letters, 274 selfloop transitions, 122 changer transitions 1/397 dead transitions. [2023-08-30 04:38:30,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 397 transitions, 5031 flow [2023-08-30 04:38:30,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 04:38:30,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 04:38:30,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3450 transitions. [2023-08-30 04:38:30,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2023-08-30 04:38:30,994 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3450 transitions. [2023-08-30 04:38:30,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3450 transitions. [2023-08-30 04:38:30,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:38:30,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3450 transitions. [2023-08-30 04:38:30,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 143.75) internal successors, (3450), 24 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:38:31,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 375.0) internal successors, (9375), 25 states have internal predecessors, (9375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:38:31,003 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 375.0) internal successors, (9375), 25 states have internal predecessors, (9375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:38:31,003 INFO L175 Difference]: Start difference. First operand has 169 places, 123 transitions, 1796 flow. Second operand 24 states and 3450 transitions. [2023-08-30 04:38:31,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 397 transitions, 5031 flow [2023-08-30 04:38:31,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 397 transitions, 4824 flow, removed 23 selfloop flow, removed 5 redundant places. [2023-08-30 04:38:31,397 INFO L231 Difference]: Finished difference. Result has 191 places, 192 transitions, 3006 flow [2023-08-30 04:38:31,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3006, PETRI_PLACES=191, PETRI_TRANSITIONS=192} [2023-08-30 04:38:31,398 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2023-08-30 04:38:31,398 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 192 transitions, 3006 flow [2023-08-30 04:38:31,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 135.375) internal successors, (2166), 16 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:38:31,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:38:31,399 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 04:38:31,407 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 (27)] Forceful destruction successful, exit code 0 [2023-08-30 04:38:31,599 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 [2023-08-30 04:38:31,600 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:38:31,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:38:31,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1000527962, now seen corresponding path program 3 times [2023-08-30 04:38:31,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:38:31,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [939881194] [2023-08-30 04:38:31,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 04:38:31,601 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:38:31,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:38:31,602 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) [2023-08-30 04:38:31,603 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 [2023-08-30 04:38:31,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 04:38:31,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:38:31,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 04:38:31,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:38:31,886 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 04:38:31,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 04:38:32,516 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:38:32,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:38:35,302 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:38:35,302 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:38:35,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [939881194] [2023-08-30 04:38:35,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [939881194] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:38:35,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:38:35,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 04:38:35,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566208980] [2023-08-30 04:38:35,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:38:35,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 04:38:35,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:38:35,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 04:38:35,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 04:39:02,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 375 [2023-08-30 04:39:02,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 192 transitions, 3006 flow. Second operand has 24 states, 24 states have (on average 152.0) internal successors, (3648), 24 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:39:02,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:39:02,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 375 [2023-08-30 04:39:02,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:39:16,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:39:18,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:39:20,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:39:22,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:39:24,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:39:25,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:39:27,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:39:29,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:39:31,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:39:33,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:39:51,102 INFO L130 PetriNetUnfolder]: 21276/38737 cut-off events. [2023-08-30 04:39:51,102 INFO L131 PetriNetUnfolder]: For 347016/347016 co-relation queries the response was YES. [2023-08-30 04:39:51,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191043 conditions, 38737 events. 21276/38737 cut-off events. For 347016/347016 co-relation queries the response was YES. Maximal size of possible extension queue 1255. Compared 347285 event pairs, 17301 based on Foata normal form. 28/38765 useless extension candidates. Maximal degree in co-relation 190965. Up to 6063 conditions per place. [2023-08-30 04:39:51,679 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 614 selfloop transitions, 75 changer transitions 0/689 dead transitions. [2023-08-30 04:39:51,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 689 transitions, 10134 flow [2023-08-30 04:39:51,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 04:39:51,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 04:39:51,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3961 transitions. [2023-08-30 04:39:51,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4401111111111111 [2023-08-30 04:39:51,687 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3961 transitions. [2023-08-30 04:39:51,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3961 transitions. [2023-08-30 04:39:51,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:39:51,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3961 transitions. [2023-08-30 04:39:51,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 165.04166666666666) internal successors, (3961), 24 states have internal predecessors, (3961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:39:51,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 375.0) internal successors, (9375), 25 states have internal predecessors, (9375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:39:51,699 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 375.0) internal successors, (9375), 25 states have internal predecessors, (9375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:39:51,699 INFO L175 Difference]: Start difference. First operand has 191 places, 192 transitions, 3006 flow. Second operand 24 states and 3961 transitions. [2023-08-30 04:39:51,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 689 transitions, 10134 flow [2023-08-30 04:39:53,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 689 transitions, 9872 flow, removed 102 selfloop flow, removed 8 redundant places. [2023-08-30 04:39:53,154 INFO L231 Difference]: Finished difference. Result has 219 places, 224 transitions, 3460 flow [2023-08-30 04:39:53,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=2804, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3460, PETRI_PLACES=219, PETRI_TRANSITIONS=224} [2023-08-30 04:39:53,154 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2023-08-30 04:39:53,154 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 224 transitions, 3460 flow [2023-08-30 04:39:53,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 152.0) internal successors, (3648), 24 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:39:53,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:39:53,155 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:39:53,164 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 (28)] Forceful destruction successful, exit code 0 [2023-08-30 04:39:53,357 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 [2023-08-30 04:39:53,357 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:39:53,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:39:53,358 INFO L85 PathProgramCache]: Analyzing trace with hash 213159507, now seen corresponding path program 4 times [2023-08-30 04:39:53,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:39:53,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111910252] [2023-08-30 04:39:53,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 04:39:53,358 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:39:53,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:39:53,360 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) [2023-08-30 04:39:53,360 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 [2023-08-30 04:39:53,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 04:39:53,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:39:53,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 04:39:53,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:39:53,610 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 04:39:53,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 04:39:53,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 04:39:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 04:39:54,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:39:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 04:39:54,594 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:39:54,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111910252] [2023-08-30 04:39:54,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [111910252] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:39:54,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:39:54,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 04:39:54,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672466612] [2023-08-30 04:39:54,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:39:54,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 04:39:54,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:39:54,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 04:39:54,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-08-30 04:39:59,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 375 [2023-08-30 04:39:59,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 224 transitions, 3460 flow. Second operand has 14 states, 14 states have (on average 145.71428571428572) internal successors, (2040), 14 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:39:59,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:39:59,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 375 [2023-08-30 04:39:59,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:40:12,219 INFO L130 PetriNetUnfolder]: 27505/50800 cut-off events. [2023-08-30 04:40:12,219 INFO L131 PetriNetUnfolder]: For 466494/466494 co-relation queries the response was YES. [2023-08-30 04:40:12,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240796 conditions, 50800 events. 27505/50800 cut-off events. For 466494/466494 co-relation queries the response was YES. Maximal size of possible extension queue 1655. Compared 483115 event pairs, 18505 based on Foata normal form. 1536/52336 useless extension candidates. Maximal degree in co-relation 240708. Up to 35753 conditions per place. [2023-08-30 04:40:13,116 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 403 selfloop transitions, 21 changer transitions 0/424 dead transitions. [2023-08-30 04:40:13,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 424 transitions, 6553 flow [2023-08-30 04:40:13,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 04:40:13,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 04:40:13,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1845 transitions. [2023-08-30 04:40:13,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2023-08-30 04:40:13,121 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1845 transitions. [2023-08-30 04:40:13,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1845 transitions. [2023-08-30 04:40:13,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:40:13,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1845 transitions. [2023-08-30 04:40:13,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 153.75) internal successors, (1845), 12 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:40:13,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 375.0) internal successors, (4875), 13 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:40:13,128 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 375.0) internal successors, (4875), 13 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:40:13,128 INFO L175 Difference]: Start difference. First operand has 219 places, 224 transitions, 3460 flow. Second operand 12 states and 1845 transitions. [2023-08-30 04:40:13,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 424 transitions, 6553 flow [2023-08-30 04:40:14,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 424 transitions, 6314 flow, removed 49 selfloop flow, removed 10 redundant places. [2023-08-30 04:40:14,688 INFO L231 Difference]: Finished difference. Result has 224 places, 230 transitions, 3475 flow [2023-08-30 04:40:14,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=3290, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3475, PETRI_PLACES=224, PETRI_TRANSITIONS=230} [2023-08-30 04:40:14,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2023-08-30 04:40:14,689 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 230 transitions, 3475 flow [2023-08-30 04:40:14,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 145.71428571428572) internal successors, (2040), 14 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:40:14,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:40:14,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:40:14,700 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 [2023-08-30 04:40:14,894 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 [2023-08-30 04:40:14,895 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:40:14,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:40:14,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1615660288, now seen corresponding path program 1 times [2023-08-30 04:40:14,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:40:14,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599166017] [2023-08-30 04:40:14,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:40:14,896 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:40:14,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:40:14,898 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) [2023-08-30 04:40:14,900 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 [2023-08-30 04:40:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:40:14,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 04:40:14,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:40:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:40:15,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:40:15,096 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:40:15,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599166017] [2023-08-30 04:40:15,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599166017] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:40:15,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:40:15,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:40:15,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820407381] [2023-08-30 04:40:15,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:40:15,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:40:15,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:40:15,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:40:15,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:40:15,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 375 [2023-08-30 04:40:15,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 230 transitions, 3475 flow. Second operand has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:40:15,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:40:15,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 375 [2023-08-30 04:40:15,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:40:23,715 INFO L130 PetriNetUnfolder]: 23197/42811 cut-off events. [2023-08-30 04:40:23,716 INFO L131 PetriNetUnfolder]: For 379805/379805 co-relation queries the response was YES. [2023-08-30 04:40:24,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208993 conditions, 42811 events. 23197/42811 cut-off events. For 379805/379805 co-relation queries the response was YES. Maximal size of possible extension queue 1389. Compared 392546 event pairs, 8565 based on Foata normal form. 109/42920 useless extension candidates. Maximal degree in co-relation 208900. Up to 39541 conditions per place. [2023-08-30 04:40:24,413 INFO L137 encePairwiseOnDemand]: 371/375 looper letters, 217 selfloop transitions, 30 changer transitions 12/259 dead transitions. [2023-08-30 04:40:24,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 259 transitions, 4332 flow [2023-08-30 04:40:24,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:40:24,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:40:24,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 539 transitions. [2023-08-30 04:40:24,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791111111111111 [2023-08-30 04:40:24,415 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 539 transitions. [2023-08-30 04:40:24,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 539 transitions. [2023-08-30 04:40:24,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:40:24,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 539 transitions. [2023-08-30 04:40:24,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:40:24,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:40:24,417 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:40:24,417 INFO L175 Difference]: Start difference. First operand has 224 places, 230 transitions, 3475 flow. Second operand 3 states and 539 transitions. [2023-08-30 04:40:24,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 259 transitions, 4332 flow [2023-08-30 04:40:25,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 259 transitions, 4314 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-30 04:40:25,500 INFO L231 Difference]: Finished difference. Result has 224 places, 239 transitions, 3666 flow [2023-08-30 04:40:25,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=3460, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3666, PETRI_PLACES=224, PETRI_TRANSITIONS=239} [2023-08-30 04:40:25,501 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2023-08-30 04:40:25,501 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 239 transitions, 3666 flow [2023-08-30 04:40:25,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:40:25,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:40:25,502 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 04:40:25,510 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 (30)] Forceful destruction successful, exit code 0 [2023-08-30 04:40:25,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:40:25,705 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:40:25,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:40:25,706 INFO L85 PathProgramCache]: Analyzing trace with hash 170973225, now seen corresponding path program 4 times [2023-08-30 04:40:25,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:40:25,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804444227] [2023-08-30 04:40:25,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 04:40:25,706 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 [2023-08-30 04:40:25,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:40:25,708 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:40:25,709 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 (31)] Waiting until timeout for monitored process [2023-08-30 04:40:25,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 04:40:25,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:40:25,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 04:40:25,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:40:25,933 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 04:40:25,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 04:40:26,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 04:40:26,362 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 04:40:26,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:40:26,912 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 04:40:26,912 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:40:26,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804444227] [2023-08-30 04:40:26,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1804444227] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:40:26,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:40:26,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 04:40:26,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938653213] [2023-08-30 04:40:26,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:40:26,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 04:40:26,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:40:26,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 04:40:26,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-08-30 04:40:31,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 375 [2023-08-30 04:40:31,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 239 transitions, 3666 flow. Second operand has 14 states, 14 states have (on average 145.71428571428572) internal successors, (2040), 14 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:40:31,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:40:31,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 375 [2023-08-30 04:40:31,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:40:41,173 INFO L130 PetriNetUnfolder]: 20039/36843 cut-off events. [2023-08-30 04:40:41,174 INFO L131 PetriNetUnfolder]: For 364752/364752 co-relation queries the response was YES. [2023-08-30 04:40:41,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183567 conditions, 36843 events. 20039/36843 cut-off events. For 364752/364752 co-relation queries the response was YES. Maximal size of possible extension queue 1184. Compared 333226 event pairs, 14570 based on Foata normal form. 280/37123 useless extension candidates. Maximal degree in co-relation 183472. Up to 30000 conditions per place. [2023-08-30 04:40:41,920 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 321 selfloop transitions, 31 changer transitions 11/363 dead transitions. [2023-08-30 04:40:41,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 363 transitions, 5351 flow [2023-08-30 04:40:41,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 04:40:41,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 04:40:41,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1840 transitions. [2023-08-30 04:40:41,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088888888888889 [2023-08-30 04:40:41,939 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1840 transitions. [2023-08-30 04:40:41,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1840 transitions. [2023-08-30 04:40:41,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:40:41,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1840 transitions. [2023-08-30 04:40:41,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 153.33333333333334) internal successors, (1840), 12 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:40:41,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 375.0) internal successors, (4875), 13 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:40:41,945 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 375.0) internal successors, (4875), 13 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:40:41,945 INFO L175 Difference]: Start difference. First operand has 224 places, 239 transitions, 3666 flow. Second operand 12 states and 1840 transitions. [2023-08-30 04:40:41,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 363 transitions, 5351 flow [2023-08-30 04:40:42,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 363 transitions, 5226 flow, removed 46 selfloop flow, removed 2 redundant places. [2023-08-30 04:40:42,859 INFO L231 Difference]: Finished difference. Result has 231 places, 248 transitions, 3817 flow [2023-08-30 04:40:42,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=3562, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3817, PETRI_PLACES=231, PETRI_TRANSITIONS=248} [2023-08-30 04:40:42,860 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2023-08-30 04:40:42,860 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 248 transitions, 3817 flow [2023-08-30 04:40:42,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 145.71428571428572) internal successors, (2040), 14 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:40:42,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:40:42,861 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:40:42,872 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 (31)] Forceful destruction successful, exit code 0 [2023-08-30 04:40:43,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:40:43,072 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:40:43,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:40:43,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1730117227, now seen corresponding path program 5 times [2023-08-30 04:40:43,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:40:43,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975650627] [2023-08-30 04:40:43,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 04:40:43,073 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:40:43,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:40:43,074 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:40:43,075 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 (32)] Waiting until timeout for monitored process [2023-08-30 04:40:43,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 04:40:43,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:40:43,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 04:40:43,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:40:43,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 04:40:43,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:40:44,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 04:40:44,417 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:40:44,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975650627] [2023-08-30 04:40:44,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975650627] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:40:44,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:40:44,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2023-08-30 04:40:44,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378769750] [2023-08-30 04:40:44,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:40:44,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 04:40:44,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:40:44,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 04:40:44,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-08-30 04:40:47,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 375 [2023-08-30 04:40:47,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 248 transitions, 3817 flow. Second operand has 17 states, 17 states have (on average 153.47058823529412) internal successors, (2609), 17 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:40:47,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:40:47,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 375 [2023-08-30 04:40:47,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:40:57,128 INFO L130 PetriNetUnfolder]: 19220/35494 cut-off events. [2023-08-30 04:40:57,128 INFO L131 PetriNetUnfolder]: For 324999/324999 co-relation queries the response was YES. [2023-08-30 04:40:57,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174547 conditions, 35494 events. 19220/35494 cut-off events. For 324999/324999 co-relation queries the response was YES. Maximal size of possible extension queue 1152. Compared 319923 event pairs, 4884 based on Foata normal form. 140/35634 useless extension candidates. Maximal degree in co-relation 174449. Up to 16641 conditions per place. [2023-08-30 04:40:57,654 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 300 selfloop transitions, 112 changer transitions 0/412 dead transitions. [2023-08-30 04:40:57,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 412 transitions, 6449 flow [2023-08-30 04:40:57,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 04:40:57,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 04:40:57,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2407 transitions. [2023-08-30 04:40:57,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42791111111111113 [2023-08-30 04:40:57,658 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2407 transitions. [2023-08-30 04:40:57,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2407 transitions. [2023-08-30 04:40:57,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:40:57,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2407 transitions. [2023-08-30 04:40:57,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 160.46666666666667) internal successors, (2407), 15 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:40:57,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 375.0) internal successors, (6000), 16 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:40:57,666 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 375.0) internal successors, (6000), 16 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:40:57,666 INFO L175 Difference]: Start difference. First operand has 231 places, 248 transitions, 3817 flow. Second operand 15 states and 2407 transitions. [2023-08-30 04:40:57,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 412 transitions, 6449 flow [2023-08-30 04:40:58,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 412 transitions, 6424 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 04:40:58,961 INFO L231 Difference]: Finished difference. Result has 241 places, 262 transitions, 4271 flow [2023-08-30 04:40:58,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=3792, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4271, PETRI_PLACES=241, PETRI_TRANSITIONS=262} [2023-08-30 04:40:58,962 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2023-08-30 04:40:58,962 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 262 transitions, 4271 flow [2023-08-30 04:40:58,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 153.47058823529412) internal successors, (2609), 17 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:40:58,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:40:58,962 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 04:40:58,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2023-08-30 04:40:59,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:40:59,165 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:40:59,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:40:59,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1687930945, now seen corresponding path program 5 times [2023-08-30 04:40:59,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:40:59,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2074055817] [2023-08-30 04:40:59,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 04:40:59,166 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:40:59,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:40:59,169 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:40:59,169 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 (33)] Waiting until timeout for monitored process [2023-08-30 04:40:59,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 04:40:59,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:40:59,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 04:40:59,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:40:59,651 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 04:40:59,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:41:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 04:41:00,512 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:41:00,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2074055817] [2023-08-30 04:41:00,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2074055817] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:41:00,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:41:00,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 16 [2023-08-30 04:41:00,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821059540] [2023-08-30 04:41:00,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:41:00,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 04:41:00,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:41:00,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 04:41:00,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2023-08-30 04:41:04,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 375 [2023-08-30 04:41:04,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 262 transitions, 4271 flow. Second operand has 18 states, 18 states have (on average 153.38888888888889) internal successors, (2761), 18 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:41:04,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:41:04,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 375 [2023-08-30 04:41:04,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:41:13,579 INFO L130 PetriNetUnfolder]: 18154/33498 cut-off events. [2023-08-30 04:41:13,580 INFO L131 PetriNetUnfolder]: For 360376/360376 co-relation queries the response was YES. [2023-08-30 04:41:14,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169724 conditions, 33498 events. 18154/33498 cut-off events. For 360376/360376 co-relation queries the response was YES. Maximal size of possible extension queue 1112. Compared 294365 event pairs, 4010 based on Foata normal form. 66/33564 useless extension candidates. Maximal degree in co-relation 169625. Up to 16246 conditions per place. [2023-08-30 04:41:14,144 INFO L137 encePairwiseOnDemand]: 366/375 looper letters, 236 selfloop transitions, 103 changer transitions 0/339 dead transitions. [2023-08-30 04:41:14,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 339 transitions, 5262 flow [2023-08-30 04:41:14,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 04:41:14,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 04:41:14,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2252 transitions. [2023-08-30 04:41:14,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428952380952381 [2023-08-30 04:41:14,149 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2252 transitions. [2023-08-30 04:41:14,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2252 transitions. [2023-08-30 04:41:14,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:41:14,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2252 transitions. [2023-08-30 04:41:14,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 160.85714285714286) internal successors, (2252), 14 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:41:14,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 375.0) internal successors, (5625), 15 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:41:14,154 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 375.0) internal successors, (5625), 15 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:41:14,154 INFO L175 Difference]: Start difference. First operand has 241 places, 262 transitions, 4271 flow. Second operand 14 states and 2252 transitions. [2023-08-30 04:41:14,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 339 transitions, 5262 flow [2023-08-30 04:41:15,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 339 transitions, 5014 flow, removed 9 selfloop flow, removed 9 redundant places. [2023-08-30 04:41:15,183 INFO L231 Difference]: Finished difference. Result has 246 places, 243 transitions, 3955 flow [2023-08-30 04:41:15,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=3745, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3955, PETRI_PLACES=246, PETRI_TRANSITIONS=243} [2023-08-30 04:41:15,184 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2023-08-30 04:41:15,184 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 243 transitions, 3955 flow [2023-08-30 04:41:15,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 153.38888888888889) internal successors, (2761), 18 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:41:15,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:41:15,185 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:41:15,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2023-08-30 04:41:15,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:41:15,385 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:41:15,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:41:15,386 INFO L85 PathProgramCache]: Analyzing trace with hash 2095321227, now seen corresponding path program 6 times [2023-08-30 04:41:15,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:41:15,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1575520666] [2023-08-30 04:41:15,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 04:41:15,386 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:41:15,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:41:15,387 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:41:15,390 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 (34)] Waiting until timeout for monitored process [2023-08-30 04:41:15,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 04:41:15,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:41:15,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 04:41:15,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:41:15,664 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:41:15,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 04:41:15,749 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:41:15,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:41:15,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:41:15,946 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 [2023-08-30 04:41:15,962 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:41:15,962 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 [2023-08-30 04:41:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 04:41:16,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:41:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 04:41:21,831 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:41:21,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1575520666] [2023-08-30 04:41:21,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1575520666] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:41:21,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:41:21,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-30 04:41:21,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217938290] [2023-08-30 04:41:21,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:41:21,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 04:41:21,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:41:21,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 04:41:21,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-08-30 04:41:26,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:41:28,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:41:43,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 375 [2023-08-30 04:41:43,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 243 transitions, 3955 flow. Second operand has 16 states, 16 states have (on average 141.625) internal successors, (2266), 16 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:41:43,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:41:43,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 375 [2023-08-30 04:41:43,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:42:00,391 INFO L130 PetriNetUnfolder]: 17281/31995 cut-off events. [2023-08-30 04:42:00,391 INFO L131 PetriNetUnfolder]: For 352954/352954 co-relation queries the response was YES. [2023-08-30 04:42:00,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157482 conditions, 31995 events. 17281/31995 cut-off events. For 352954/352954 co-relation queries the response was YES. Maximal size of possible extension queue 1061. Compared 285818 event pairs, 6585 based on Foata normal form. 630/32625 useless extension candidates. Maximal degree in co-relation 157385. Up to 12939 conditions per place. [2023-08-30 04:42:00,924 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 448 selfloop transitions, 84 changer transitions 0/532 dead transitions. [2023-08-30 04:42:00,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 532 transitions, 7297 flow [2023-08-30 04:42:00,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 04:42:00,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 04:42:00,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3497 transitions. [2023-08-30 04:42:00,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40544927536231884 [2023-08-30 04:42:00,930 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3497 transitions. [2023-08-30 04:42:00,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3497 transitions. [2023-08-30 04:42:00,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:42:00,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3497 transitions. [2023-08-30 04:42:00,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 152.04347826086956) internal successors, (3497), 23 states have internal predecessors, (3497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:42:00,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 375.0) internal successors, (9000), 24 states have internal predecessors, (9000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:42:00,940 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 375.0) internal successors, (9000), 24 states have internal predecessors, (9000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:42:00,940 INFO L175 Difference]: Start difference. First operand has 246 places, 243 transitions, 3955 flow. Second operand 23 states and 3497 transitions. [2023-08-30 04:42:00,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 532 transitions, 7297 flow [2023-08-30 04:42:02,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 532 transitions, 7164 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-30 04:42:02,444 INFO L231 Difference]: Finished difference. Result has 264 places, 244 transitions, 4024 flow [2023-08-30 04:42:02,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=3841, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4024, PETRI_PLACES=264, PETRI_TRANSITIONS=244} [2023-08-30 04:42:02,445 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2023-08-30 04:42:02,446 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 244 transitions, 4024 flow [2023-08-30 04:42:02,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 141.625) internal successors, (2266), 16 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:42:02,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:42:02,446 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 04:42:02,455 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 (34)] Forceful destruction successful, exit code 0 [2023-08-30 04:42:02,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:42:02,649 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:42:02,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:42:02,649 INFO L85 PathProgramCache]: Analyzing trace with hash 2053134945, now seen corresponding path program 6 times [2023-08-30 04:42:02,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:42:02,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736409690] [2023-08-30 04:42:02,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 04:42:02,650 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:42:02,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:42:02,651 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:42:02,651 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 (35)] Waiting until timeout for monitored process [2023-08-30 04:42:02,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 04:42:02,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:42:02,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 04:42:02,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:42:02,912 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:42:02,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 04:42:03,000 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:42:03,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:42:03,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:42:03,184 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 [2023-08-30 04:42:03,208 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:42:03,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 04:42:03,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 04:42:03,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:42:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 04:42:05,907 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:42:05,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736409690] [2023-08-30 04:42:05,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [736409690] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:42:05,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:42:05,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2023-08-30 04:42:05,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323947574] [2023-08-30 04:42:05,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:42:05,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 04:42:05,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:42:05,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 04:42:05,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-08-30 04:42:15,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:42:31,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:42:37,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 375 [2023-08-30 04:42:37,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 244 transitions, 4024 flow. Second operand has 17 states, 17 states have (on average 142.52941176470588) internal successors, (2423), 17 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:42:37,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:42:37,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 375 [2023-08-30 04:42:37,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:42:53,091 INFO L130 PetriNetUnfolder]: 16849/31275 cut-off events. [2023-08-30 04:42:53,091 INFO L131 PetriNetUnfolder]: For 322219/322219 co-relation queries the response was YES. [2023-08-30 04:42:53,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154077 conditions, 31275 events. 16849/31275 cut-off events. For 322219/322219 co-relation queries the response was YES. Maximal size of possible extension queue 1038. Compared 275829 event pairs, 5814 based on Foata normal form. 288/31563 useless extension candidates. Maximal degree in co-relation 153979. Up to 8217 conditions per place. [2023-08-30 04:42:53,563 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 382 selfloop transitions, 103 changer transitions 0/485 dead transitions. [2023-08-30 04:42:53,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 485 transitions, 6657 flow [2023-08-30 04:42:53,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 04:42:53,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 04:42:53,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3214 transitions. [2023-08-30 04:42:53,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4081269841269841 [2023-08-30 04:42:53,566 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3214 transitions. [2023-08-30 04:42:53,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3214 transitions. [2023-08-30 04:42:53,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:42:53,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3214 transitions. [2023-08-30 04:42:53,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 153.04761904761904) internal successors, (3214), 21 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:42:53,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 375.0) internal successors, (8250), 22 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:42:53,575 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 375.0) internal successors, (8250), 22 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:42:53,575 INFO L175 Difference]: Start difference. First operand has 264 places, 244 transitions, 4024 flow. Second operand 21 states and 3214 transitions. [2023-08-30 04:42:53,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 485 transitions, 6657 flow [2023-08-30 04:42:54,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 485 transitions, 6259 flow, removed 30 selfloop flow, removed 17 redundant places. [2023-08-30 04:42:54,393 INFO L231 Difference]: Finished difference. Result has 272 places, 255 transitions, 4235 flow [2023-08-30 04:42:54,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=3767, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4235, PETRI_PLACES=272, PETRI_TRANSITIONS=255} [2023-08-30 04:42:54,394 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2023-08-30 04:42:54,394 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 255 transitions, 4235 flow [2023-08-30 04:42:54,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 142.52941176470588) internal successors, (2423), 17 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:42:54,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:42:54,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:42:54,403 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 (35)] Ended with exit code 0 [2023-08-30 04:42:54,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:42:54,595 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:42:54,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:42:54,596 INFO L85 PathProgramCache]: Analyzing trace with hash 227944711, now seen corresponding path program 1 times [2023-08-30 04:42:54,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:42:54,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669061401] [2023-08-30 04:42:54,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:42:54,596 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:42:54,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:42:54,597 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:42:54,598 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 (36)] Waiting until timeout for monitored process [2023-08-30 04:42:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:42:54,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 04:42:54,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:42:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:42:55,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:42:55,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:42:55,573 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:42:55,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669061401] [2023-08-30 04:42:55,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669061401] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:42:55,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:42:55,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-08-30 04:42:55,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090697106] [2023-08-30 04:42:55,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:42:55,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:42:55,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:42:55,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:42:55,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:42:57,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 375 [2023-08-30 04:42:57,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 255 transitions, 4235 flow. Second operand has 12 states, 12 states have (on average 150.91666666666666) internal successors, (1811), 12 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:42:57,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:42:57,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 375 [2023-08-30 04:42:57,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:43:06,862 INFO L130 PetriNetUnfolder]: 16607/30753 cut-off events. [2023-08-30 04:43:06,862 INFO L131 PetriNetUnfolder]: For 269922/269922 co-relation queries the response was YES. [2023-08-30 04:43:07,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150728 conditions, 30753 events. 16607/30753 cut-off events. For 269922/269922 co-relation queries the response was YES. Maximal size of possible extension queue 1013. Compared 268119 event pairs, 2385 based on Foata normal form. 140/30893 useless extension candidates. Maximal degree in co-relation 150628. Up to 11659 conditions per place. [2023-08-30 04:43:07,408 INFO L137 encePairwiseOnDemand]: 363/375 looper letters, 230 selfloop transitions, 125 changer transitions 2/357 dead transitions. [2023-08-30 04:43:07,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 357 transitions, 5768 flow [2023-08-30 04:43:07,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 04:43:07,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 04:43:07,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2498 transitions. [2023-08-30 04:43:07,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41633333333333333 [2023-08-30 04:43:07,411 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2498 transitions. [2023-08-30 04:43:07,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2498 transitions. [2023-08-30 04:43:07,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:43:07,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2498 transitions. [2023-08-30 04:43:07,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 156.125) internal successors, (2498), 16 states have internal predecessors, (2498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:43:07,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 375.0) internal successors, (6375), 17 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:43:07,416 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 375.0) internal successors, (6375), 17 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:43:07,416 INFO L175 Difference]: Start difference. First operand has 272 places, 255 transitions, 4235 flow. Second operand 16 states and 2498 transitions. [2023-08-30 04:43:07,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 357 transitions, 5768 flow [2023-08-30 04:43:08,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 357 transitions, 5629 flow, removed 18 selfloop flow, removed 9 redundant places. [2023-08-30 04:43:08,505 INFO L231 Difference]: Finished difference. Result has 284 places, 259 transitions, 4586 flow [2023-08-30 04:43:08,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=4101, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4586, PETRI_PLACES=284, PETRI_TRANSITIONS=259} [2023-08-30 04:43:08,505 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2023-08-30 04:43:08,505 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 259 transitions, 4586 flow [2023-08-30 04:43:08,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 150.91666666666666) internal successors, (1811), 12 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:43:08,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:43:08,506 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:43:08,514 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 (36)] Forceful destruction successful, exit code 0 [2023-08-30 04:43:08,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:43:08,706 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:43:08,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:43:08,707 INFO L85 PathProgramCache]: Analyzing trace with hash 530451462, now seen corresponding path program 7 times [2023-08-30 04:43:08,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:43:08,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153414770] [2023-08-30 04:43:08,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 04:43:08,707 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:43:08,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:43:08,708 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:43:08,709 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 (37)] Waiting until timeout for monitored process [2023-08-30 04:43:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:43:08,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 04:43:08,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:43:08,990 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 04:43:08,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 04:43:09,313 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 18 treesize of output 12 [2023-08-30 04:43:09,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 04:43:09,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:43:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 04:43:10,655 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:43:10,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153414770] [2023-08-30 04:43:10,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153414770] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:43:10,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:43:10,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 04:43:10,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360890692] [2023-08-30 04:43:10,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:43:10,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 04:43:10,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:43:10,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 04:43:10,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-30 04:43:19,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 375 [2023-08-30 04:43:19,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 259 transitions, 4586 flow. Second operand has 18 states, 18 states have (on average 145.55555555555554) internal successors, (2620), 18 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:43:19,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:43:19,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 375 [2023-08-30 04:43:19,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:43:31,646 INFO L130 PetriNetUnfolder]: 20003/37461 cut-off events. [2023-08-30 04:43:31,646 INFO L131 PetriNetUnfolder]: For 407599/407599 co-relation queries the response was YES. [2023-08-30 04:43:32,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194743 conditions, 37461 events. 20003/37461 cut-off events. For 407599/407599 co-relation queries the response was YES. Maximal size of possible extension queue 1209. Compared 345974 event pairs, 11258 based on Foata normal form. 1116/38577 useless extension candidates. Maximal degree in co-relation 194638. Up to 19020 conditions per place. [2023-08-30 04:43:32,330 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 463 selfloop transitions, 46 changer transitions 0/509 dead transitions. [2023-08-30 04:43:32,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 509 transitions, 8839 flow [2023-08-30 04:43:32,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 04:43:32,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 04:43:32,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2607 transitions. [2023-08-30 04:43:32,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40894117647058825 [2023-08-30 04:43:32,336 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2607 transitions. [2023-08-30 04:43:32,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2607 transitions. [2023-08-30 04:43:32,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:43:32,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2607 transitions. [2023-08-30 04:43:32,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 153.35294117647058) internal successors, (2607), 17 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:43:32,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 375.0) internal successors, (6750), 18 states have internal predecessors, (6750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:43:32,341 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 375.0) internal successors, (6750), 18 states have internal predecessors, (6750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:43:32,341 INFO L175 Difference]: Start difference. First operand has 284 places, 259 transitions, 4586 flow. Second operand 17 states and 2607 transitions. [2023-08-30 04:43:32,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 509 transitions, 8839 flow [2023-08-30 04:43:35,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 509 transitions, 8415 flow, removed 145 selfloop flow, removed 14 redundant places. [2023-08-30 04:43:35,749 INFO L231 Difference]: Finished difference. Result has 289 places, 262 transitions, 4494 flow [2023-08-30 04:43:35,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=4349, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4494, PETRI_PLACES=289, PETRI_TRANSITIONS=262} [2023-08-30 04:43:35,750 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2023-08-30 04:43:35,750 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 262 transitions, 4494 flow [2023-08-30 04:43:35,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 145.55555555555554) internal successors, (2620), 18 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:43:35,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:43:35,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:43:35,761 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 (37)] Ended with exit code 0 [2023-08-30 04:43:35,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:43:35,951 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:43:35,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:43:35,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1526758319, now seen corresponding path program 1 times [2023-08-30 04:43:35,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:43:35,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543686357] [2023-08-30 04:43:35,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:43:35,952 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:43:35,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:43:35,953 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:43:35,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2023-08-30 04:43:36,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:43:36,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 04:43:36,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:43:36,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 04:43:36,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:43:36,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2023-08-30 04:43:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:43:37,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:43:37,369 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 04:43:37,369 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 27 [2023-08-30 04:43:37,432 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 04:43:37,433 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 17 treesize of output 13 [2023-08-30 04:43:39,113 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse7 (select |c_#memory_int| c_~A~0.base)) (.cse6 (bvmul (_ bv4 32) c_~i_AB~0))) (let ((.cse8 (forall ((~B~0.offset (_ BitVec 32)) (~B~0.base (_ BitVec 32)) (~A~0.offset (_ BitVec 32)) (v_ArrVal_1170 (Array (_ BitVec 32) (_ BitVec 8)))) (not (= (let ((.cse9 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1170) ~B~0.base))) (concat (concat (concat (select .cse9 (bvadd (_ bv3 32) .cse6 ~B~0.offset)) (select .cse9 (bvadd (_ bv2 32) .cse6 ~B~0.offset))) (select .cse9 (bvadd .cse6 ~B~0.offset (_ bv1 32)))) (select .cse9 (bvadd .cse6 ~B~0.offset)))) (concat (concat (concat (select .cse7 (bvadd ~A~0.offset (_ bv3 32) .cse6)) (select .cse7 (bvadd ~A~0.offset (_ bv2 32) .cse6))) (select .cse7 (bvadd ~A~0.offset .cse6 (_ bv1 32)))) (select .cse7 (bvadd ~A~0.offset .cse6)))))))) (and (forall ((~A~0.offset (_ BitVec 32))) (let ((.cse1 (bvmul (_ bv4 32) c_~i_BA~0))) (let ((.cse0 (bvadd ~A~0.offset .cse1))) (or (not (bvule .cse0 (bvadd (_ bv4 32) ~A~0.offset .cse1))) (forall ((~B~0.offset (_ BitVec 32)) (~B~0.base (_ BitVec 32)) (v_ArrVal_1170 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1170))) (let ((.cse5 (bvadd .cse1 ~B~0.offset)) (.cse4 (select .cse3 ~B~0.base))) (or (= (let ((.cse2 (select .cse3 c_~A~0.base))) (concat (concat (concat (select .cse2 (bvadd ~A~0.offset (_ bv3 32) .cse1)) (select .cse2 (bvadd ~A~0.offset (_ bv2 32) .cse1))) (select .cse2 (bvadd ~A~0.offset .cse1 (_ bv1 32)))) (select .cse2 .cse0))) (concat (concat (concat (select .cse4 (bvadd (_ bv3 32) .cse1 ~B~0.offset)) (select .cse4 (bvadd (_ bv2 32) .cse1 ~B~0.offset))) (select .cse4 (bvadd .cse1 ~B~0.offset (_ bv1 32)))) (select .cse4 .cse5))) (not (bvule .cse5 (bvadd (_ bv4 32) .cse1 ~B~0.offset))) (not (= (concat (concat (concat (select .cse4 (bvadd (_ bv3 32) .cse6 ~B~0.offset)) (select .cse4 (bvadd (_ bv2 32) .cse6 ~B~0.offset))) (select .cse4 (bvadd .cse6 ~B~0.offset (_ bv1 32)))) (select .cse4 (bvadd .cse6 ~B~0.offset))) (concat (concat (concat (select .cse7 (bvadd ~A~0.offset (_ bv3 32) .cse6)) (select .cse7 (bvadd ~A~0.offset (_ bv2 32) .cse6))) (select .cse7 (bvadd ~A~0.offset .cse6 (_ bv1 32)))) (select .cse7 (bvadd ~A~0.offset .cse6))))))))))))) (or (bvslt c_~i_BA~0 c_~Bn~0) .cse8) (or .cse8 (bvslt c_~i_BA~0 c_~An~0))))) is different from false [2023-08-30 04:45:25,566 WARN L222 SmtUtils]: Spent 1.77m on a formula simplification. DAG size of input: 374 DAG size of output: 290 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-08-30 04:45:25,569 INFO L321 Elim1Store]: treesize reduction 336, result has 77.1 percent of original size [2023-08-30 04:45:25,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 12 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 3324 treesize of output 3682 [2023-08-30 04:45:25,908 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:25,933 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:25,958 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:25,986 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:26,009 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:26,030 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:26,070 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:26,089 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:26,117 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:26,195 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:26,195 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:26,204 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:26,265 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:26,282 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:26,283 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:26,335 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:26,336 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:26,392 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:26,393 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:26,412 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:26,412 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:26,479 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:26,479 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:26,497 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:26,539 INFO L217 Elim1Store]: Index analysis took 661 ms [2023-08-30 04:45:29,878 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 04:45:29,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 48 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 72 case distinctions, treesize of input 1506 treesize of output 2064 [2023-08-30 04:45:30,214 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:30,250 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:30,263 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:30,301 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:30,321 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:30,535 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:30,536 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:30,536 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:30,549 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:30,550 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:30,550 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:30,561 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 04:45:30,600 INFO L217 Elim1Store]: Index analysis took 386 ms [2023-08-30 04:45:32,185 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 04:45:32,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 30 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 36 case distinctions, treesize of input 1128 treesize of output 1056 Killed by 15