./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/array-eq-trans.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/array-eq-trans.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 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 01:13:19,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:13:19,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:13:19,795 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:13:19,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:13:19,798 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:13:19,800 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:13:19,803 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:13:19,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:13:19,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:13:19,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:13:19,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:13:19,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:13:19,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:13:19,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:13:19,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:13:19,822 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:13:19,823 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:13:19,824 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:13:19,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:13:19,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:13:19,837 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:13:19,838 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:13:19,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:13:19,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:13:19,847 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:13:19,847 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:13:19,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:13:19,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:13:19,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:13:19,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:13:19,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:13:19,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:13:19,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:13:19,856 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:13:19,856 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:13:19,856 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:13:19,857 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:13:19,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:13:19,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:13:19,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:13:19,860 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 01:13:19,884 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:13:19,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:13:19,885 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:13:19,886 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:13:19,886 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:13:19,887 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:13:19,887 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:13:19,887 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:13:19,888 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:13:19,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:13:19,888 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:13:19,889 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:13:19,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:13:19,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:13:19,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:13:19,889 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:13:19,890 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:13:19,890 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:13:19,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:13:19,890 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:13:19,890 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:13:19,891 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:13:19,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:13:19,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:13:19,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:13:19,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:13:19,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:13:19,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:13:19,892 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 01:13:19,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 01:13:19,892 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:13:19,893 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:13:19,893 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:13:19,893 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:13:19,893 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:13:20,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:13:20,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:13:20,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:13:20,217 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:13:20,217 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:13:20,219 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2023-09-01 01:13:21,346 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:13:21,508 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:13:21,508 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2023-09-01 01:13:21,526 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50853ddf0/add067334161443f98ee55e0d1d04112/FLAG4a534de4a [2023-09-01 01:13:21,537 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50853ddf0/add067334161443f98ee55e0d1d04112 [2023-09-01 01:13:21,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:13:21,540 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:13:21,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:13:21,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:13:21,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:13:21,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:13:21" (1/1) ... [2023-09-01 01:13:21,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46fd5ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:21, skipping insertion in model container [2023-09-01 01:13:21,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:13:21" (1/1) ... [2023-09-01 01:13:21,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:13:21,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:13:21,774 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-trans.wvr.c[2737,2750] [2023-09-01 01:13:21,792 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:13:21,804 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 01:13:21,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@714a8f07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:21, skipping insertion in model container [2023-09-01 01:13:21,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:13:21,807 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 01:13:21,808 INFO L158 Benchmark]: Toolchain (without parser) took 266.84ms. Allocated memory is still 83.9MB. Free memory was 64.8MB in the beginning and 54.7MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 01:13:21,809 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 65.0MB. Free memory is still 43.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 01:13:21,809 INFO L158 Benchmark]: CACSL2BoogieTranslator took 265.02ms. Allocated memory is still 83.9MB. Free memory was 64.5MB in the beginning and 54.7MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 01:13:21,811 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 65.0MB. Free memory is still 43.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 265.02ms. Allocated memory is still 83.9MB. Free memory was 64.5MB in the beginning and 54.7MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 111]: 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-trans.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 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 01:13:23,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:13:23,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:13:23,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:13:23,568 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:13:23,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:13:23,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:13:23,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:13:23,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:13:23,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:13:23,583 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:13:23,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:13:23,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:13:23,588 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:13:23,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:13:23,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:13:23,597 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:13:23,598 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:13:23,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:13:23,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:13:23,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:13:23,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:13:23,610 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:13:23,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:13:23,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:13:23,619 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:13:23,619 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:13:23,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:13:23,621 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:13:23,622 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:13:23,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:13:23,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:13:23,626 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:13:23,626 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:13:23,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:13:23,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:13:23,628 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:13:23,628 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:13:23,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:13:23,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:13:23,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:13:23,631 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 01:13:23,664 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:13:23,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:13:23,666 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:13:23,666 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:13:23,667 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:13:23,667 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:13:23,668 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:13:23,668 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:13:23,668 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:13:23,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:13:23,669 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:13:23,669 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:13:23,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:13:23,669 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:13:23,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:13:23,670 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:13:23,670 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:13:23,670 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:13:23,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:13:23,671 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:13:23,671 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 01:13:23,671 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 01:13:23,671 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:13:23,671 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:13:23,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:13:23,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:13:23,672 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:13:23,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:13:23,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:13:23,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:13:23,673 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 01:13:23,673 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 01:13:23,673 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:13:23,674 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:13:23,674 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:13:23,674 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 01:13:23,674 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:13:23,674 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:13:23,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:13:24,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:13:24,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:13:24,015 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:13:24,016 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:13:24,017 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2023-09-01 01:13:25,088 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:13:25,311 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:13:25,311 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2023-09-01 01:13:25,319 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9808dcf10/397d802f6fa54fdca688a893dd433a9f/FLAG4282b3d1c [2023-09-01 01:13:25,344 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9808dcf10/397d802f6fa54fdca688a893dd433a9f [2023-09-01 01:13:25,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:13:25,348 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:13:25,351 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:13:25,351 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:13:25,354 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:13:25,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:13:25" (1/1) ... [2023-09-01 01:13:25,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ab3e5e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:25, skipping insertion in model container [2023-09-01 01:13:25,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:13:25" (1/1) ... [2023-09-01 01:13:25,361 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:13:25,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:13:25,587 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-trans.wvr.c[2737,2750] [2023-09-01 01:13:25,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:13:25,624 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 01:13:25,634 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:13:25,656 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-trans.wvr.c[2737,2750] [2023-09-01 01:13:25,662 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:13:25,672 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 01:13:25,707 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-trans.wvr.c[2737,2750] [2023-09-01 01:13:25,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:13:25,733 INFO L208 MainTranslator]: Completed translation [2023-09-01 01:13:25,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:25 WrapperNode [2023-09-01 01:13:25,733 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:13:25,735 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 01:13:25,735 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 01:13:25,735 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 01:13:25,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:25" (1/1) ... [2023-09-01 01:13:25,762 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:25" (1/1) ... [2023-09-01 01:13:25,791 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 204 [2023-09-01 01:13:25,792 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 01:13:25,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 01:13:25,793 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 01:13:25,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 01:13:25,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:25" (1/1) ... [2023-09-01 01:13:25,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:25" (1/1) ... [2023-09-01 01:13:25,817 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:25" (1/1) ... [2023-09-01 01:13:25,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:25" (1/1) ... [2023-09-01 01:13:25,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:25" (1/1) ... [2023-09-01 01:13:25,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:25" (1/1) ... [2023-09-01 01:13:25,847 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:25" (1/1) ... [2023-09-01 01:13:25,852 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:25" (1/1) ... [2023-09-01 01:13:25,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 01:13:25,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 01:13:25,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 01:13:25,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 01:13:25,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:25" (1/1) ... [2023-09-01 01:13:25,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:13:25,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:13:25,898 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 01:13:25,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 01:13:25,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 01:13:25,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 01:13:25,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 01:13:25,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 01:13:25,944 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 01:13:25,944 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 01:13:25,944 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 01:13:25,944 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 01:13:25,945 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 01:13:25,945 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 01:13:25,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 01:13:25,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 01:13:25,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 01:13:25,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 01:13:25,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 01:13:25,947 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 01:13:26,118 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 01:13:26,120 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 01:13:26,861 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 01:13:26,870 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 01:13:26,870 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 01:13:26,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:13:26 BoogieIcfgContainer [2023-09-01 01:13:26,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 01:13:26,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 01:13:26,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 01:13:26,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 01:13:26,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:13:25" (1/3) ... [2023-09-01 01:13:26,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f533453 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:13:26, skipping insertion in model container [2023-09-01 01:13:26,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:25" (2/3) ... [2023-09-01 01:13:26,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f533453 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:13:26, skipping insertion in model container [2023-09-01 01:13:26,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:13:26" (3/3) ... [2023-09-01 01:13:26,880 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.c [2023-09-01 01:13:26,894 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 01:13:26,895 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-09-01 01:13:26,895 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 01:13:27,003 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 01:13:27,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 307 places, 327 transitions, 678 flow [2023-09-01 01:13:27,189 INFO L130 PetriNetUnfolder]: 30/324 cut-off events. [2023-09-01 01:13:27,189 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 01:13:27,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 324 events. 30/324 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 481 event pairs, 0 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 204. Up to 3 conditions per place. [2023-09-01 01:13:27,196 INFO L82 GeneralOperation]: Start removeDead. Operand has 307 places, 327 transitions, 678 flow [2023-09-01 01:13:27,202 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 300 places, 320 transitions, 658 flow [2023-09-01 01:13:27,205 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 01:13:27,213 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 300 places, 320 transitions, 658 flow [2023-09-01 01:13:27,215 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 300 places, 320 transitions, 658 flow [2023-09-01 01:13:27,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 300 places, 320 transitions, 658 flow [2023-09-01 01:13:27,270 INFO L130 PetriNetUnfolder]: 30/320 cut-off events. [2023-09-01 01:13:27,270 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 01:13:27,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 320 events. 30/320 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 477 event pairs, 0 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 204. Up to 3 conditions per place. [2023-09-01 01:13:27,276 INFO L119 LiptonReduction]: Number of co-enabled transitions 4560 [2023-09-01 01:14:42,954 INFO L134 LiptonReduction]: Checked pairs total: 7632 [2023-09-01 01:14:42,954 INFO L136 LiptonReduction]: Total number of compositions: 396 [2023-09-01 01:14:42,965 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 01:14:42,970 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;@f92e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 01:14:42,971 INFO L358 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2023-09-01 01:14:42,973 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 01:14:42,973 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 01:14:42,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:14:42,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:14:42,974 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-09-01 01:14:42,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:14:42,978 INFO L85 PathProgramCache]: Analyzing trace with hash 40080, now seen corresponding path program 1 times [2023-09-01 01:14:42,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:14:42,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647766397] [2023-09-01 01:14:42,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:14:42,989 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:14:42,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:14:42,997 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:14:42,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 01:14:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:14:43,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:14:43,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:14:43,346 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 01:14:43,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 01:14:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:14:43,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:14:43,386 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:14:43,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647766397] [2023-09-01 01:14:43,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647766397] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:14:43,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:14:43,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:14:43,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117440961] [2023-09-01 01:14:43,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:14:43,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:14:43,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:14:43,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:14:43,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:14:43,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 723 [2023-09-01 01:14:43,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:43,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:14:43,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 723 [2023-09-01 01:14:43,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:14:46,218 INFO L130 PetriNetUnfolder]: 8875/12108 cut-off events. [2023-09-01 01:14:46,218 INFO L131 PetriNetUnfolder]: For 250/250 co-relation queries the response was YES. [2023-09-01 01:14:46,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24547 conditions, 12108 events. 8875/12108 cut-off events. For 250/250 co-relation queries the response was YES. Maximal size of possible extension queue 1211. Compared 61852 event pairs, 6734 based on Foata normal form. 0/3153 useless extension candidates. Maximal degree in co-relation 11012. Up to 6057 conditions per place. [2023-09-01 01:14:46,283 INFO L137 encePairwiseOnDemand]: 713/723 looper letters, 132 selfloop transitions, 6 changer transitions 0/138 dead transitions. [2023-09-01 01:14:46,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 138 transitions, 588 flow [2023-09-01 01:14:46,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:14:46,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:14:46,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1013 transitions. [2023-09-01 01:14:46,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.467035500230521 [2023-09-01 01:14:46,302 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1013 transitions. [2023-09-01 01:14:46,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1013 transitions. [2023-09-01 01:14:46,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:14:46,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1013 transitions. [2023-09-01 01:14:46,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 337.6666666666667) internal successors, (1013), 3 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:46,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:46,320 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:46,322 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 162 flow. Second operand 3 states and 1013 transitions. [2023-09-01 01:14:46,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 138 transitions, 588 flow [2023-09-01 01:14:46,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 138 transitions, 564 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 01:14:46,335 INFO L231 Difference]: Finished difference. Result has 71 places, 76 transitions, 198 flow [2023-09-01 01:14:46,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=71, PETRI_TRANSITIONS=76} [2023-09-01 01:14:46,339 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2023-09-01 01:14:46,340 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 76 transitions, 198 flow [2023-09-01 01:14:46,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:46,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:14:46,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:14:46,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 01:14:46,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:14:46,553 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-09-01 01:14:46,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:14:46,554 INFO L85 PathProgramCache]: Analyzing trace with hash 40079, now seen corresponding path program 1 times [2023-09-01 01:14:46,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:14:46,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361407029] [2023-09-01 01:14:46,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:14:46,555 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:14:46,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:14:46,556 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:14:46,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 01:14:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:14:46,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 01:14:46,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:14:46,700 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:14:46,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 01:14:46,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:14:46,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:14:46,719 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:14:46,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361407029] [2023-09-01 01:14:46,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1361407029] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:14:46,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:14:46,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:14:46,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911367894] [2023-09-01 01:14:46,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:14:46,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:14:46,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:14:46,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:14:46,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:14:46,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 723 [2023-09-01 01:14:46,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 76 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:46,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:14:46,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 723 [2023-09-01 01:14:46,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:14:48,482 INFO L130 PetriNetUnfolder]: 8875/12102 cut-off events. [2023-09-01 01:14:48,483 INFO L131 PetriNetUnfolder]: For 70/70 co-relation queries the response was YES. [2023-09-01 01:14:48,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24342 conditions, 12102 events. 8875/12102 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 1211. Compared 61891 event pairs, 6734 based on Foata normal form. 4/3163 useless extension candidates. Maximal degree in co-relation 12151. Up to 12102 conditions per place. [2023-09-01 01:14:48,539 INFO L137 encePairwiseOnDemand]: 719/723 looper letters, 72 selfloop transitions, 1 changer transitions 0/73 dead transitions. [2023-09-01 01:14:48,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 73 transitions, 338 flow [2023-09-01 01:14:48,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:14:48,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:14:48,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 941 transitions. [2023-09-01 01:14:48,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.433840479483633 [2023-09-01 01:14:48,548 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 941 transitions. [2023-09-01 01:14:48,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 941 transitions. [2023-09-01 01:14:48,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:14:48,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 941 transitions. [2023-09-01 01:14:48,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 313.6666666666667) internal successors, (941), 3 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:48,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:48,557 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:48,557 INFO L175 Difference]: Start difference. First operand has 71 places, 76 transitions, 198 flow. Second operand 3 states and 941 transitions. [2023-09-01 01:14:48,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 73 transitions, 338 flow [2023-09-01 01:14:48,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 73 transitions, 326 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:14:48,559 INFO L231 Difference]: Finished difference. Result has 68 places, 73 transitions, 182 flow [2023-09-01 01:14:48,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=68, PETRI_TRANSITIONS=73} [2023-09-01 01:14:48,561 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -6 predicate places. [2023-09-01 01:14:48,561 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 73 transitions, 182 flow [2023-09-01 01:14:48,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:48,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:14:48,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:14:48,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-09-01 01:14:48,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:14:48,771 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-09-01 01:14:48,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:14:48,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1246476, now seen corresponding path program 1 times [2023-09-01 01:14:48,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:14:48,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [821054890] [2023-09-01 01:14:48,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:14:48,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:14:48,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:14:48,775 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:14:48,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 01:14:48,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:14:48,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:14:48,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:14:48,982 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 01:14:48,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 01:14:49,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:14:49,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:14:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:14:49,225 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:14:49,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [821054890] [2023-09-01 01:14:49,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [821054890] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:14:49,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:14:49,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 01:14:49,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793169981] [2023-09-01 01:14:49,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:14:49,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:14:49,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:14:49,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:14:49,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:14:50,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 723 [2023-09-01 01:14:50,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 182 flow. Second operand has 6 states, 6 states have (on average 276.0) internal successors, (1656), 6 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:50,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:14:50,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 723 [2023-09-01 01:14:50,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:14:54,266 INFO L130 PetriNetUnfolder]: 13322/18167 cut-off events. [2023-09-01 01:14:54,267 INFO L131 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2023-09-01 01:14:54,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36539 conditions, 18167 events. 13322/18167 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 1680. Compared 97793 event pairs, 10101 based on Foata normal form. 0/4740 useless extension candidates. Maximal degree in co-relation 36531. Up to 6055 conditions per place. [2023-09-01 01:14:54,351 INFO L137 encePairwiseOnDemand]: 711/723 looper letters, 185 selfloop transitions, 27 changer transitions 0/212 dead transitions. [2023-09-01 01:14:54,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 212 transitions, 926 flow [2023-09-01 01:14:54,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:14:54,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:14:54,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1871 transitions. [2023-09-01 01:14:54,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43130474873213465 [2023-09-01 01:14:54,360 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1871 transitions. [2023-09-01 01:14:54,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1871 transitions. [2023-09-01 01:14:54,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:14:54,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1871 transitions. [2023-09-01 01:14:54,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 311.8333333333333) internal successors, (1871), 6 states have internal predecessors, (1871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:54,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 723.0) internal successors, (5061), 7 states have internal predecessors, (5061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:54,374 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 723.0) internal successors, (5061), 7 states have internal predecessors, (5061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:54,374 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 182 flow. Second operand 6 states and 1871 transitions. [2023-09-01 01:14:54,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 212 transitions, 926 flow [2023-09-01 01:14:54,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 212 transitions, 925 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:14:54,379 INFO L231 Difference]: Finished difference. Result has 76 places, 94 transitions, 385 flow [2023-09-01 01:14:54,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=385, PETRI_PLACES=76, PETRI_TRANSITIONS=94} [2023-09-01 01:14:54,380 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2023-09-01 01:14:54,380 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 94 transitions, 385 flow [2023-09-01 01:14:54,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 276.0) internal successors, (1656), 6 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:54,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:14:54,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 01:14:54,393 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 [2023-09-01 01:14:54,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:14:54,593 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-09-01 01:14:54,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:14:54,594 INFO L85 PathProgramCache]: Analyzing trace with hash 38693201, now seen corresponding path program 1 times [2023-09-01 01:14:54,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:14:54,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757182204] [2023-09-01 01:14:54,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:14:54,595 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:14:54,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:14:54,598 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:14:54,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 01:14:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:14:54,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:14:54,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:14:54,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:14:54,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:14:54,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:14:54,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:14:54,829 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-09-01 01:14:54,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-09-01 01:14:54,854 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 01:14:54,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-09-01 01:14:54,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:14:54,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:14:54,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:14:54,946 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 [2023-09-01 01:14:54,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:14:54,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:14:54,974 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:14:54,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757182204] [2023-09-01 01:14:54,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757182204] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:14:54,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:14:54,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:14:54,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328067740] [2023-09-01 01:14:54,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:14:54,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:14:54,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:14:54,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:14:54,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:14:55,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 723 [2023-09-01 01:14:55,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 94 transitions, 385 flow. Second operand has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:55,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:14:55,521 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 723 [2023-09-01 01:14:55,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:14:56,987 INFO L130 PetriNetUnfolder]: 10422/14382 cut-off events. [2023-09-01 01:14:56,987 INFO L131 PetriNetUnfolder]: For 113/113 co-relation queries the response was YES. [2023-09-01 01:14:57,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29043 conditions, 14382 events. 10422/14382 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 1189. Compared 76198 event pairs, 7854 based on Foata normal form. 0/4100 useless extension candidates. Maximal degree in co-relation 29030. Up to 14382 conditions per place. [2023-09-01 01:14:57,040 INFO L137 encePairwiseOnDemand]: 720/723 looper letters, 89 selfloop transitions, 1 changer transitions 0/90 dead transitions. [2023-09-01 01:14:57,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 90 transitions, 545 flow [2023-09-01 01:14:57,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:14:57,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:14:57,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 959 transitions. [2023-09-01 01:14:57,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.442139234670355 [2023-09-01 01:14:57,046 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 959 transitions. [2023-09-01 01:14:57,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 959 transitions. [2023-09-01 01:14:57,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:14:57,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 959 transitions. [2023-09-01 01:14:57,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 319.6666666666667) internal successors, (959), 3 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:57,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:57,054 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:57,054 INFO L175 Difference]: Start difference. First operand has 76 places, 94 transitions, 385 flow. Second operand 3 states and 959 transitions. [2023-09-01 01:14:57,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 90 transitions, 545 flow [2023-09-01 01:14:57,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 90 transitions, 515 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 01:14:57,057 INFO L231 Difference]: Finished difference. Result has 75 places, 90 transitions, 337 flow [2023-09-01 01:14:57,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=337, PETRI_PLACES=75, PETRI_TRANSITIONS=90} [2023-09-01 01:14:57,058 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2023-09-01 01:14:57,058 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 90 transitions, 337 flow [2023-09-01 01:14:57,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:57,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:14:57,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 01:14:57,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 01:14:57,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:14:57,269 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-09-01 01:14:57,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:14:57,269 INFO L85 PathProgramCache]: Analyzing trace with hash 38693203, now seen corresponding path program 1 times [2023-09-01 01:14:57,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:14:57,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1327579910] [2023-09-01 01:14:57,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:14:57,270 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:14:57,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:14:57,273 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:14:57,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 01:14:57,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:14:57,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 01:14:57,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:14:57,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:14:57,457 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-09-01 01:14:57,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-09-01 01:14:57,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:14:57,521 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 20 [2023-09-01 01:14:57,560 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 01:14:57,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:14:57,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:14:57,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:14:57,572 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:14:57,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1327579910] [2023-09-01 01:14:57,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1327579910] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:14:57,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:14:57,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:14:57,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122203251] [2023-09-01 01:14:57,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:14:57,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:14:57,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:14:57,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:14:57,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:14:57,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 723 [2023-09-01 01:14:57,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 90 transitions, 337 flow. Second operand has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:57,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:14:57,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 723 [2023-09-01 01:14:57,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:14:58,865 INFO L130 PetriNetUnfolder]: 7522/10597 cut-off events. [2023-09-01 01:14:58,865 INFO L131 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2023-09-01 01:14:58,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21447 conditions, 10597 events. 7522/10597 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 55265 event pairs, 5607 based on Foata normal form. 0/3449 useless extension candidates. Maximal degree in co-relation 21433. Up to 10597 conditions per place. [2023-09-01 01:14:58,898 INFO L137 encePairwiseOnDemand]: 720/723 looper letters, 85 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2023-09-01 01:14:58,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 86 transitions, 489 flow [2023-09-01 01:14:58,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:14:58,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:14:58,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 957 transitions. [2023-09-01 01:14:58,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412171507607192 [2023-09-01 01:14:58,903 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 957 transitions. [2023-09-01 01:14:58,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 957 transitions. [2023-09-01 01:14:58,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:14:58,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 957 transitions. [2023-09-01 01:14:58,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:58,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:58,910 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:58,910 INFO L175 Difference]: Start difference. First operand has 75 places, 90 transitions, 337 flow. Second operand 3 states and 957 transitions. [2023-09-01 01:14:58,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 86 transitions, 489 flow [2023-09-01 01:14:58,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 86 transitions, 488 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:14:58,913 INFO L231 Difference]: Finished difference. Result has 74 places, 86 transitions, 318 flow [2023-09-01 01:14:58,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=318, PETRI_PLACES=74, PETRI_TRANSITIONS=86} [2023-09-01 01:14:58,914 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2023-09-01 01:14:58,914 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 86 transitions, 318 flow [2023-09-01 01:14:58,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:58,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:14:58,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 01:14:58,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-09-01 01:14:59,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:14:59,120 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-09-01 01:14:59,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:14:59,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1470511458, now seen corresponding path program 1 times [2023-09-01 01:14:59,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:14:59,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1088480473] [2023-09-01 01:14:59,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:14:59,121 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:14:59,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:14:59,122 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:14:59,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 01:14:59,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:14:59,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 01:14:59,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:14:59,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:14:59,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:14:59,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:14:59,301 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:14:59,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-09-01 01:14:59,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 01:14:59,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:14:59,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:14:59,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:14:59,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:14:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:14:59,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:14:59,413 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:14:59,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1088480473] [2023-09-01 01:14:59,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1088480473] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:14:59,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:14:59,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:14:59,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947118347] [2023-09-01 01:14:59,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:14:59,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:14:59,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:14:59,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:14:59,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:14:59,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 723 [2023-09-01 01:14:59,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 86 transitions, 318 flow. Second operand has 4 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:59,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:14:59,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 723 [2023-09-01 01:14:59,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:15:00,821 INFO L130 PetriNetUnfolder]: 7228/10156 cut-off events. [2023-09-01 01:15:00,821 INFO L131 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2023-09-01 01:15:00,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20566 conditions, 10156 events. 7228/10156 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 52631 event pairs, 5376 based on Foata normal form. 0/3386 useless extension candidates. Maximal degree in co-relation 20551. Up to 10156 conditions per place. [2023-09-01 01:15:00,847 INFO L137 encePairwiseOnDemand]: 720/723 looper letters, 83 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-09-01 01:15:00,847 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 84 transitions, 482 flow [2023-09-01 01:15:00,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:15:00,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:15:00,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 955 transitions. [2023-09-01 01:15:00,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44029506685108344 [2023-09-01 01:15:00,858 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 955 transitions. [2023-09-01 01:15:00,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 955 transitions. [2023-09-01 01:15:00,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:15:00,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 955 transitions. [2023-09-01 01:15:00,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 318.3333333333333) internal successors, (955), 3 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:00,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:00,865 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:00,865 INFO L175 Difference]: Start difference. First operand has 74 places, 86 transitions, 318 flow. Second operand 3 states and 955 transitions. [2023-09-01 01:15:00,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 84 transitions, 482 flow [2023-09-01 01:15:00,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 84 transitions, 481 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:15:00,869 INFO L231 Difference]: Finished difference. Result has 73 places, 84 transitions, 315 flow [2023-09-01 01:15:00,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=315, PETRI_PLACES=73, PETRI_TRANSITIONS=84} [2023-09-01 01:15:00,873 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2023-09-01 01:15:00,873 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 84 transitions, 315 flow [2023-09-01 01:15:00,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:00,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:15:00,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 01:15:00,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 01:15:01,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:15:01,084 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-09-01 01:15:01,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:15:01,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1470511459, now seen corresponding path program 1 times [2023-09-01 01:15:01,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:15:01,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591707229] [2023-09-01 01:15:01,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:15:01,085 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:15:01,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:15:01,086 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:15:01,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 01:15:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:15:01,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 01:15:01,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:15:01,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:15:01,253 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-09-01 01:15:01,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-09-01 01:15:01,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:15:01,325 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 20 [2023-09-01 01:15:01,358 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 01:15:01,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:15:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:15:01,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:15:01,385 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:15:01,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591707229] [2023-09-01 01:15:01,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1591707229] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:15:01,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:15:01,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:15:01,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424351737] [2023-09-01 01:15:01,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:15:01,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:15:01,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:15:01,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:15:01,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:15:01,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 723 [2023-09-01 01:15:01,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 84 transitions, 315 flow. Second operand has 4 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:01,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:15:01,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 723 [2023-09-01 01:15:01,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:15:02,720 INFO L130 PetriNetUnfolder]: 6934/9715 cut-off events. [2023-09-01 01:15:02,720 INFO L131 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2023-09-01 01:15:02,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19685 conditions, 9715 events. 6934/9715 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 762. Compared 50007 event pairs, 5145 based on Foata normal form. 0/3323 useless extension candidates. Maximal degree in co-relation 19669. Up to 9715 conditions per place. [2023-09-01 01:15:02,762 INFO L137 encePairwiseOnDemand]: 720/723 looper letters, 81 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-09-01 01:15:02,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 82 transitions, 475 flow [2023-09-01 01:15:02,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:15:02,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:15:02,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 953 transitions. [2023-09-01 01:15:02,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43937298294144767 [2023-09-01 01:15:02,769 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 953 transitions. [2023-09-01 01:15:02,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 953 transitions. [2023-09-01 01:15:02,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:15:02,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 953 transitions. [2023-09-01 01:15:02,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 317.6666666666667) internal successors, (953), 3 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:02,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:02,775 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:02,776 INFO L175 Difference]: Start difference. First operand has 73 places, 84 transitions, 315 flow. Second operand 3 states and 953 transitions. [2023-09-01 01:15:02,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 82 transitions, 475 flow [2023-09-01 01:15:02,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 82 transitions, 474 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:15:02,778 INFO L231 Difference]: Finished difference. Result has 72 places, 82 transitions, 312 flow [2023-09-01 01:15:02,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=312, PETRI_PLACES=72, PETRI_TRANSITIONS=82} [2023-09-01 01:15:02,780 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -2 predicate places. [2023-09-01 01:15:02,780 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 82 transitions, 312 flow [2023-09-01 01:15:02,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:02,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:15:02,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 01:15:02,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 01:15:02,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:15:02,990 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-09-01 01:15:02,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:15:02,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1470511528, now seen corresponding path program 1 times [2023-09-01 01:15:02,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:15:02,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975187131] [2023-09-01 01:15:02,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:15:02,991 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:15:02,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:15:02,992 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:15:02,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 01:15:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:15:03,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:15:03,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:15:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:15:03,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:15:03,145 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:15:03,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [975187131] [2023-09-01 01:15:03,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [975187131] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:15:03,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:15:03,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:15:03,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021050907] [2023-09-01 01:15:03,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:15:03,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:15:03,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:15:03,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:15:03,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:15:03,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 723 [2023-09-01 01:15:03,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 82 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 290.5) internal successors, (1162), 4 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:03,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:15:03,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 723 [2023-09-01 01:15:03,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:15:04,775 INFO L130 PetriNetUnfolder]: 8918/12752 cut-off events. [2023-09-01 01:15:04,775 INFO L131 PetriNetUnfolder]: For 231/231 co-relation queries the response was YES. [2023-09-01 01:15:04,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25858 conditions, 12752 events. 8918/12752 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 876. Compared 70827 event pairs, 6720 based on Foata normal form. 0/4733 useless extension candidates. Maximal degree in co-relation 25841. Up to 9714 conditions per place. [2023-09-01 01:15:04,809 INFO L137 encePairwiseOnDemand]: 711/723 looper letters, 138 selfloop transitions, 3 changer transitions 0/141 dead transitions. [2023-09-01 01:15:04,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 141 transitions, 804 flow [2023-09-01 01:15:04,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:15:04,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:15:04,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1272 transitions. [2023-09-01 01:15:04,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43983402489626555 [2023-09-01 01:15:04,815 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1272 transitions. [2023-09-01 01:15:04,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1272 transitions. [2023-09-01 01:15:04,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:15:04,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1272 transitions. [2023-09-01 01:15:04,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:04,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:04,823 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:04,823 INFO L175 Difference]: Start difference. First operand has 72 places, 82 transitions, 312 flow. Second operand 4 states and 1272 transitions. [2023-09-01 01:15:04,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 141 transitions, 804 flow [2023-09-01 01:15:04,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 141 transitions, 803 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:15:04,827 INFO L231 Difference]: Finished difference. Result has 75 places, 82 transitions, 336 flow [2023-09-01 01:15:04,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=75, PETRI_TRANSITIONS=82} [2023-09-01 01:15:04,827 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2023-09-01 01:15:04,828 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 82 transitions, 336 flow [2023-09-01 01:15:04,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 290.5) internal successors, (1162), 4 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:04,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:15:04,828 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 01:15:04,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 01:15:05,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:15:05,038 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-09-01 01:15:05,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:15:05,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1516971120, now seen corresponding path program 2 times [2023-09-01 01:15:05,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:15:05,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674580996] [2023-09-01 01:15:05,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:15:05,039 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:15:05,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:15:05,040 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:15:05,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 01:15:05,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:15:05,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:15:05,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 01:15:05,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:15:05,235 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 01:15:05,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 01:15:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:15:05,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:15:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:15:05,906 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:15:05,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674580996] [2023-09-01 01:15:05,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674580996] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:15:05,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:15:05,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 01:15:05,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094602813] [2023-09-01 01:15:05,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:15:05,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:15:05,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:15:05,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:15:05,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:15:13,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 723 [2023-09-01 01:15:13,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 82 transitions, 336 flow. Second operand has 12 states, 12 states have (on average 279.0) internal successors, (3348), 12 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:13,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:15:13,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 723 [2023-09-01 01:15:13,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:15:15,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:15:17,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:15:18,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:15:23,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:15:25,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:15:27,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:15:29,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:15:32,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:15:34,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:15:43,396 INFO L130 PetriNetUnfolder]: 29696/42436 cut-off events. [2023-09-01 01:15:43,396 INFO L131 PetriNetUnfolder]: For 1941/1941 co-relation queries the response was YES. [2023-09-01 01:15:43,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91608 conditions, 42436 events. 29696/42436 cut-off events. For 1941/1941 co-relation queries the response was YES. Maximal size of possible extension queue 1362. Compared 261840 event pairs, 22400 based on Foata normal form. 30/16875 useless extension candidates. Maximal degree in co-relation 91589. Up to 5741 conditions per place. [2023-09-01 01:15:43,573 INFO L137 encePairwiseOnDemand]: 713/723 looper letters, 518 selfloop transitions, 52 changer transitions 0/570 dead transitions. [2023-09-01 01:15:43,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 570 transitions, 2820 flow [2023-09-01 01:15:43,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 01:15:43,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 01:15:43,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3924 transitions. [2023-09-01 01:15:43,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45228215767634855 [2023-09-01 01:15:43,584 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3924 transitions. [2023-09-01 01:15:43,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3924 transitions. [2023-09-01 01:15:43,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:15:43,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3924 transitions. [2023-09-01 01:15:43,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 327.0) internal successors, (3924), 12 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:43,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 723.0) internal successors, (9399), 13 states have internal predecessors, (9399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:43,606 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 723.0) internal successors, (9399), 13 states have internal predecessors, (9399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:43,606 INFO L175 Difference]: Start difference. First operand has 75 places, 82 transitions, 336 flow. Second operand 12 states and 3924 transitions. [2023-09-01 01:15:43,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 570 transitions, 2820 flow [2023-09-01 01:15:43,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 570 transitions, 2814 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 01:15:43,617 INFO L231 Difference]: Finished difference. Result has 92 places, 113 transitions, 720 flow [2023-09-01 01:15:43,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=720, PETRI_PLACES=92, PETRI_TRANSITIONS=113} [2023-09-01 01:15:43,619 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 18 predicate places. [2023-09-01 01:15:43,619 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 113 transitions, 720 flow [2023-09-01 01:15:43,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 279.0) internal successors, (3348), 12 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:43,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:15:43,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:15:43,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-09-01 01:15:43,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:15:43,830 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-09-01 01:15:43,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:15:43,830 INFO L85 PathProgramCache]: Analyzing trace with hash 264999124, now seen corresponding path program 1 times [2023-09-01 01:15:43,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:15:43,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403728660] [2023-09-01 01:15:43,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:15:43,831 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:15:43,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:15:43,832 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:15:43,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 01:15:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:15:43,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:15:43,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:15:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:15:44,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:15:44,028 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:15:44,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403728660] [2023-09-01 01:15:44,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403728660] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:15:44,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:15:44,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:15:44,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173863225] [2023-09-01 01:15:44,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:15:44,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:15:44,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:15:44,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:15:44,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:15:44,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 723 [2023-09-01 01:15:44,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 113 transitions, 720 flow. Second operand has 5 states, 5 states have (on average 289.4) internal successors, (1447), 5 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:44,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:15:44,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 723 [2023-09-01 01:15:44,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:15:52,694 INFO L130 PetriNetUnfolder]: 65938/94842 cut-off events. [2023-09-01 01:15:52,694 INFO L131 PetriNetUnfolder]: For 3912/3912 co-relation queries the response was YES. [2023-09-01 01:15:52,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203405 conditions, 94842 events. 65938/94842 cut-off events. For 3912/3912 co-relation queries the response was YES. Maximal size of possible extension queue 2819. Compared 675670 event pairs, 32900 based on Foata normal form. 1150/39429 useless extension candidates. Maximal degree in co-relation 203378. Up to 41283 conditions per place. [2023-09-01 01:15:53,219 INFO L137 encePairwiseOnDemand]: 709/723 looper letters, 202 selfloop transitions, 15 changer transitions 0/217 dead transitions. [2023-09-01 01:15:53,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 217 transitions, 1512 flow [2023-09-01 01:15:53,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:15:53,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:15:53,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1602 transitions. [2023-09-01 01:15:53,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44315352697095434 [2023-09-01 01:15:53,224 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1602 transitions. [2023-09-01 01:15:53,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1602 transitions. [2023-09-01 01:15:53,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:15:53,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1602 transitions. [2023-09-01 01:15:53,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 320.4) internal successors, (1602), 5 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:53,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 723.0) internal successors, (4338), 6 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:53,231 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 723.0) internal successors, (4338), 6 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:53,231 INFO L175 Difference]: Start difference. First operand has 92 places, 113 transitions, 720 flow. Second operand 5 states and 1602 transitions. [2023-09-01 01:15:53,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 217 transitions, 1512 flow [2023-09-01 01:15:53,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 217 transitions, 1395 flow, removed 28 selfloop flow, removed 4 redundant places. [2023-09-01 01:15:53,256 INFO L231 Difference]: Finished difference. Result has 94 places, 114 transitions, 694 flow [2023-09-01 01:15:53,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=694, PETRI_PLACES=94, PETRI_TRANSITIONS=114} [2023-09-01 01:15:53,257 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 20 predicate places. [2023-09-01 01:15:53,257 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 114 transitions, 694 flow [2023-09-01 01:15:53,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 289.4) internal successors, (1447), 5 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:53,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:15:53,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:15:53,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 01:15:53,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:15:53,467 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-09-01 01:15:53,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:15:53,468 INFO L85 PathProgramCache]: Analyzing trace with hash -437028230, now seen corresponding path program 1 times [2023-09-01 01:15:53,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:15:53,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [82712677] [2023-09-01 01:15:53,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:15:53,469 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:15:53,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:15:53,470 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:15:53,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 01:15:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:15:53,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:15:53,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:15:53,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 01:15:53,655 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 01:15:53,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:15:53,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:15:53,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:15:53,668 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:15:53,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [82712677] [2023-09-01 01:15:53,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [82712677] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:15:53,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:15:53,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:15:53,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860093519] [2023-09-01 01:15:53,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:15:53,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:15:53,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:15:53,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:15:53,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:15:53,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 723 [2023-09-01 01:15:53,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 114 transitions, 694 flow. Second operand has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:53,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:15:53,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 723 [2023-09-01 01:15:53,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:16:01,014 INFO L130 PetriNetUnfolder]: 52378/75452 cut-off events. [2023-09-01 01:16:01,014 INFO L131 PetriNetUnfolder]: For 8838/8838 co-relation queries the response was YES. [2023-09-01 01:16:01,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171442 conditions, 75452 events. 52378/75452 cut-off events. For 8838/8838 co-relation queries the response was YES. Maximal size of possible extension queue 2329. Compared 516003 event pairs, 39480 based on Foata normal form. 0/34222 useless extension candidates. Maximal degree in co-relation 171412. Up to 75404 conditions per place. [2023-09-01 01:16:01,445 INFO L137 encePairwiseOnDemand]: 717/723 looper letters, 98 selfloop transitions, 12 changer transitions 0/110 dead transitions. [2023-09-01 01:16:01,445 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 110 transitions, 898 flow [2023-09-01 01:16:01,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:16:01,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:16:01,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1180 transitions. [2023-09-01 01:16:01,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40802213001383125 [2023-09-01 01:16:01,449 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1180 transitions. [2023-09-01 01:16:01,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1180 transitions. [2023-09-01 01:16:01,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:16:01,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1180 transitions. [2023-09-01 01:16:01,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:16:01,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:16:01,456 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:16:01,456 INFO L175 Difference]: Start difference. First operand has 94 places, 114 transitions, 694 flow. Second operand 4 states and 1180 transitions. [2023-09-01 01:16:01,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 110 transitions, 898 flow [2023-09-01 01:16:01,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 110 transitions, 892 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 01:16:01,469 INFO L231 Difference]: Finished difference. Result has 92 places, 110 transitions, 696 flow [2023-09-01 01:16:01,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=696, PETRI_PLACES=92, PETRI_TRANSITIONS=110} [2023-09-01 01:16:01,470 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 18 predicate places. [2023-09-01 01:16:01,470 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 110 transitions, 696 flow [2023-09-01 01:16:01,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:16:01,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:16:01,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:16:01,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 01:16:01,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:16:01,681 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-09-01 01:16:01,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:16:01,681 INFO L85 PathProgramCache]: Analyzing trace with hash -437028231, now seen corresponding path program 1 times [2023-09-01 01:16:01,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:16:01,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237332940] [2023-09-01 01:16:01,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:16:01,682 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:16:01,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:16:01,683 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:16:01,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 01:16:01,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:16:01,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 01:16:01,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:16:01,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 01:16:01,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 01:16:01,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:16:01,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 01:16:01,961 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:16:01,962 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 [2023-09-01 01:16:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:16:02,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:16:04,426 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 01:16:04,426 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 55 treesize of output 62 [2023-09-01 01:16:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:16:04,582 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:16:04,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237332940] [2023-09-01 01:16:04,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237332940] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:16:04,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:16:04,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 01:16:04,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175435202] [2023-09-01 01:16:04,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:16:04,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:16:04,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:16:04,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:16:04,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:16:09,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 723 [2023-09-01 01:16:09,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 110 transitions, 696 flow. Second operand has 10 states, 10 states have (on average 262.6) internal successors, (2626), 10 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:16:09,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:16:09,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 723 [2023-09-01 01:16:09,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:16:32,380 INFO L130 PetriNetUnfolder]: 99424/143497 cut-off events. [2023-09-01 01:16:32,380 INFO L131 PetriNetUnfolder]: For 16651/16651 co-relation queries the response was YES. [2023-09-01 01:16:32,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322686 conditions, 143497 events. 99424/143497 cut-off events. For 16651/16651 co-relation queries the response was YES. Maximal size of possible extension queue 4278. Compared 1066088 event pairs, 63490 based on Foata normal form. 0/65888 useless extension candidates. Maximal degree in co-relation 322655. Up to 29326 conditions per place. [2023-09-01 01:16:33,461 INFO L137 encePairwiseOnDemand]: 709/723 looper letters, 727 selfloop transitions, 74 changer transitions 0/801 dead transitions. [2023-09-01 01:16:33,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 801 transitions, 4324 flow [2023-09-01 01:16:33,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 01:16:33,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 01:16:33,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 6777 transitions. [2023-09-01 01:16:33,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40754104275663 [2023-09-01 01:16:33,472 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 6777 transitions. [2023-09-01 01:16:33,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 6777 transitions. [2023-09-01 01:16:33,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:16:33,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 6777 transitions. [2023-09-01 01:16:33,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 294.6521739130435) internal successors, (6777), 23 states have internal predecessors, (6777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:16:33,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 723.0) internal successors, (17352), 24 states have internal predecessors, (17352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:16:33,500 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 723.0) internal successors, (17352), 24 states have internal predecessors, (17352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:16:33,501 INFO L175 Difference]: Start difference. First operand has 92 places, 110 transitions, 696 flow. Second operand 23 states and 6777 transitions. [2023-09-01 01:16:33,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 801 transitions, 4324 flow [2023-09-01 01:16:33,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 801 transitions, 4311 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:16:33,537 INFO L231 Difference]: Finished difference. Result has 128 places, 144 transitions, 1177 flow [2023-09-01 01:16:33,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1177, PETRI_PLACES=128, PETRI_TRANSITIONS=144} [2023-09-01 01:16:33,537 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 54 predicate places. [2023-09-01 01:16:33,538 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 144 transitions, 1177 flow [2023-09-01 01:16:33,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 262.6) internal successors, (2626), 10 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:16:33,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:16:33,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:16:33,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-09-01 01:16:33,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:16:33,748 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-09-01 01:16:33,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:16:33,749 INFO L85 PathProgramCache]: Analyzing trace with hash -437028329, now seen corresponding path program 1 times [2023-09-01 01:16:33,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:16:33,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178097124] [2023-09-01 01:16:33,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:16:33,749 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:16:33,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:16:33,750 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:16:33,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 01:16:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:16:33,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 01:16:33,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:16:33,971 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:16:33,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 01:16:33,996 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 01:16:33,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 01:16:34,012 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 01:16:34,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:16:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:16:34,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:16:34,022 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:16:34,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178097124] [2023-09-01 01:16:34,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178097124] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:16:34,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:16:34,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:16:34,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171079011] [2023-09-01 01:16:34,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:16:34,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:16:34,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:16:34,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:16:34,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:16:34,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 723 [2023-09-01 01:16:34,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 144 transitions, 1177 flow. Second operand has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:16:34,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:16:34,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 723 [2023-09-01 01:16:34,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:16:46,617 INFO L130 PetriNetUnfolder]: 77046/111763 cut-off events. [2023-09-01 01:16:46,617 INFO L131 PetriNetUnfolder]: For 146598/146598 co-relation queries the response was YES. [2023-09-01 01:16:47,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282813 conditions, 111763 events. 77046/111763 cut-off events. For 146598/146598 co-relation queries the response was YES. Maximal size of possible extension queue 3299. Compared 811207 event pairs, 56332 based on Foata normal form. 0/56497 useless extension candidates. Maximal degree in co-relation 282766. Up to 111750 conditions per place. [2023-09-01 01:16:47,761 INFO L137 encePairwiseOnDemand]: 717/723 looper letters, 128 selfloop transitions, 12 changer transitions 0/140 dead transitions. [2023-09-01 01:16:47,761 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 140 transitions, 1441 flow [2023-09-01 01:16:47,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:16:47,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:16:47,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1176 transitions. [2023-09-01 01:16:47,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4066390041493776 [2023-09-01 01:16:47,765 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1176 transitions. [2023-09-01 01:16:47,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1176 transitions. [2023-09-01 01:16:47,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:16:47,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1176 transitions. [2023-09-01 01:16:47,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:16:47,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:16:47,770 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:16:47,770 INFO L175 Difference]: Start difference. First operand has 128 places, 144 transitions, 1177 flow. Second operand 4 states and 1176 transitions. [2023-09-01 01:16:47,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 140 transitions, 1441 flow [2023-09-01 01:16:48,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 140 transitions, 1338 flow, removed 16 selfloop flow, removed 4 redundant places. [2023-09-01 01:16:48,742 INFO L231 Difference]: Finished difference. Result has 123 places, 140 transitions, 1082 flow [2023-09-01 01:16:48,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1082, PETRI_PLACES=123, PETRI_TRANSITIONS=140} [2023-09-01 01:16:48,743 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 49 predicate places. [2023-09-01 01:16:48,743 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 140 transitions, 1082 flow [2023-09-01 01:16:48,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:16:48,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:16:48,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:16:48,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-09-01 01:16:48,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:16:48,944 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-09-01 01:16:48,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:16:48,945 INFO L85 PathProgramCache]: Analyzing trace with hash -117245573, now seen corresponding path program 1 times [2023-09-01 01:16:48,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:16:48,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1152781108] [2023-09-01 01:16:48,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:16:48,945 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:16:48,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:16:48,946 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:16:48,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 01:16:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:16:49,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 01:16:49,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:16:49,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 01:16:49,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:16:49,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:16:49,123 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:16:49,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1152781108] [2023-09-01 01:16:49,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1152781108] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:16:49,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:16:49,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:16:49,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536295742] [2023-09-01 01:16:49,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:16:49,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:16:49,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:16:49,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:16:49,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:16:49,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 723 [2023-09-01 01:16:49,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 140 transitions, 1082 flow. Second operand has 5 states, 5 states have (on average 288.6) internal successors, (1443), 5 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:16:49,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:16:49,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 723 [2023-09-01 01:16:49,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:17:11,605 INFO L130 PetriNetUnfolder]: 138972/201064 cut-off events. [2023-09-01 01:17:11,605 INFO L131 PetriNetUnfolder]: For 284404/284404 co-relation queries the response was YES. [2023-09-01 01:17:12,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505521 conditions, 201064 events. 138972/201064 cut-off events. For 284404/284404 co-relation queries the response was YES. Maximal size of possible extension queue 5585. Compared 1587493 event pairs, 45390 based on Foata normal form. 0/102284 useless extension candidates. Maximal degree in co-relation 505475. Up to 113091 conditions per place. [2023-09-01 01:17:13,714 INFO L137 encePairwiseOnDemand]: 717/723 looper letters, 173 selfloop transitions, 23 changer transitions 0/196 dead transitions. [2023-09-01 01:17:13,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 196 transitions, 1762 flow [2023-09-01 01:17:13,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:17:13,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:17:13,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1526 transitions. [2023-09-01 01:17:13,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42213001383125864 [2023-09-01 01:17:13,719 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1526 transitions. [2023-09-01 01:17:13,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1526 transitions. [2023-09-01 01:17:13,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:17:13,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1526 transitions. [2023-09-01 01:17:13,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 305.2) internal successors, (1526), 5 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:17:13,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 723.0) internal successors, (4338), 6 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:17:13,723 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 723.0) internal successors, (4338), 6 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:17:13,723 INFO L175 Difference]: Start difference. First operand has 123 places, 140 transitions, 1082 flow. Second operand 5 states and 1526 transitions. [2023-09-01 01:17:13,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 196 transitions, 1762 flow [2023-09-01 01:17:15,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 196 transitions, 1749 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:17:15,454 INFO L231 Difference]: Finished difference. Result has 126 places, 141 transitions, 1134 flow [2023-09-01 01:17:15,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1134, PETRI_PLACES=126, PETRI_TRANSITIONS=141} [2023-09-01 01:17:15,454 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 52 predicate places. [2023-09-01 01:17:15,455 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 141 transitions, 1134 flow [2023-09-01 01:17:15,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 288.6) internal successors, (1443), 5 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:17:15,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:17:15,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:17:15,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-09-01 01:17:15,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:17:15,656 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-09-01 01:17:15,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:17:15,656 INFO L85 PathProgramCache]: Analyzing trace with hash -117245571, now seen corresponding path program 1 times [2023-09-01 01:17:15,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:17:15,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [679645265] [2023-09-01 01:17:15,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:17:15,657 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:17:15,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:17:15,659 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:17:15,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 01:17:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:17:15,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:17:15,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:17:15,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 01:17:15,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:17:15,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:17:15,769 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:17:15,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [679645265] [2023-09-01 01:17:15,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [679645265] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:17:15,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:17:15,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:17:15,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478048584] [2023-09-01 01:17:15,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:17:15,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:17:15,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:17:15,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:17:15,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:17:16,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 723 [2023-09-01 01:17:16,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 141 transitions, 1134 flow. Second operand has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:17:16,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:17:16,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 723 [2023-09-01 01:17:16,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:17:31,366 INFO L130 PetriNetUnfolder]: 97742/141494 cut-off events. [2023-09-01 01:17:31,366 INFO L131 PetriNetUnfolder]: For 203534/203534 co-relation queries the response was YES. [2023-09-01 01:17:32,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374152 conditions, 141494 events. 97742/141494 cut-off events. For 203534/203534 co-relation queries the response was YES. Maximal size of possible extension queue 3930. Compared 1053413 event pairs, 70440 based on Foata normal form. 0/89094 useless extension candidates. Maximal degree in co-relation 374105. Up to 141328 conditions per place. [2023-09-01 01:17:32,687 INFO L137 encePairwiseOnDemand]: 717/723 looper letters, 126 selfloop transitions, 11 changer transitions 0/137 dead transitions. [2023-09-01 01:17:32,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 137 transitions, 1400 flow [2023-09-01 01:17:32,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:17:32,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:17:32,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1172 transitions. [2023-09-01 01:17:32,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40525587828492393 [2023-09-01 01:17:32,691 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1172 transitions. [2023-09-01 01:17:32,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1172 transitions. [2023-09-01 01:17:32,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:17:32,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1172 transitions. [2023-09-01 01:17:32,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:17:32,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:17:32,695 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:17:32,695 INFO L175 Difference]: Start difference. First operand has 126 places, 141 transitions, 1134 flow. Second operand 4 states and 1172 transitions. [2023-09-01 01:17:32,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 137 transitions, 1400 flow [2023-09-01 01:17:34,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 137 transitions, 1365 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:17:34,150 INFO L231 Difference]: Finished difference. Result has 122 places, 137 transitions, 1113 flow [2023-09-01 01:17:34,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=1091, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1113, PETRI_PLACES=122, PETRI_TRANSITIONS=137} [2023-09-01 01:17:34,151 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 48 predicate places. [2023-09-01 01:17:34,151 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 137 transitions, 1113 flow [2023-09-01 01:17:34,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:17:34,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:17:34,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:17:34,161 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 (16)] Ended with exit code 0 [2023-09-01 01:17:34,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:17:34,361 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-09-01 01:17:34,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:17:34,361 INFO L85 PathProgramCache]: Analyzing trace with hash -437028328, now seen corresponding path program 1 times [2023-09-01 01:17:34,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:17:34,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [851407657] [2023-09-01 01:17:34,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:17:34,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:17:34,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:17:34,362 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:17:34,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 01:17:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:17:34,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 01:17:34,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:17:34,604 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 01:17:34,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 01:17:34,719 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:17:34,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 01:17:34,865 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 01:17:34,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 01:17:34,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 01:17:35,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:17:35,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 01:17:35,073 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:17:35,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:17:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:17:35,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:17:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:17:39,784 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:17:39,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [851407657] [2023-09-01 01:17:39,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [851407657] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:17:39,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:17:39,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 01:17:39,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527431449] [2023-09-01 01:17:39,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:17:39,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:17:39,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:17:39,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:17:39,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:17:42,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:17:44,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:17:46,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 01:17:50,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:17:52,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 01:17:54,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:17:56,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:17:58,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:18:01,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:18:03,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:18:06,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:18:08,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:18:10,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:18:14,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 01:18:19,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 01:18:22,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:18:25,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:18:27,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:18:29,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 01:18:29,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 723 [2023-09-01 01:18:29,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 137 transitions, 1113 flow. Second operand has 10 states, 10 states have (on average 229.6) internal successors, (2296), 10 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:18:29,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:18:29,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 723 [2023-09-01 01:18:29,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:18:37,424 WARN L222 SmtUtils]: Spent 7.55s on a formula simplification. DAG size of input: 46 DAG size of output: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)