./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-array-int-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 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:37:15,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:37:15,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:37:15,751 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:37:15,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:37:15,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:37:15,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:37:15,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:37:15,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:37:15,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:37:15,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:37:15,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:37:15,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:37:15,772 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:37:15,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:37:15,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:37:15,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:37:15,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:37:15,783 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:37:15,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:37:15,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:37:15,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:37:15,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:37:15,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:37:15,798 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:37:15,798 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:37:15,798 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:37:15,800 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:37:15,801 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:37:15,802 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:37:15,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:37:15,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:37:15,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:37:15,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:37:15,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:37:15,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:37:15,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:37:15,807 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:37:15,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:37:15,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:37:15,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:37:15,810 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 22:37:15,849 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:37:15,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:37:15,850 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:37:15,851 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:37:15,851 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:37:15,852 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:37:15,852 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:37:15,852 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:37:15,852 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:37:15,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:37:15,853 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:37:15,854 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:37:15,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:37:15,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:37:15,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:37:15,854 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:37:15,855 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:37:15,855 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:37:15,855 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:37:15,855 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:37:15,855 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:37:15,856 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:37:15,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:37:15,856 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:37:15,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:37:15,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:37:15,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:37:15,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:37:15,857 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 22:37:15,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 22:37:15,857 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:37:15,858 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:37:15,858 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:37:15,858 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:37:15,858 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:37:16,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:37:16,200 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:37:16,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:37:16,203 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:37:16,203 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:37:16,205 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c [2023-08-29 22:37:17,424 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:37:17,659 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:37:17,660 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c [2023-08-29 22:37:17,665 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/743dc96ee/a59db6a13d7648d6a227c5b6cbd9080e/FLAG83d918283 [2023-08-29 22:37:17,675 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/743dc96ee/a59db6a13d7648d6a227c5b6cbd9080e [2023-08-29 22:37:17,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:37:17,678 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:37:17,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:37:17,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:37:17,682 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:37:17,683 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:37:17" (1/1) ... [2023-08-29 22:37:17,684 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@277db03a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:17, skipping insertion in model container [2023-08-29 22:37:17,684 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:37:17" (1/1) ... [2023-08-29 22:37:17,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:37:17,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:37:17,835 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/chl-array-int-trans.wvr.c[2728,2741] [2023-08-29 22:37:17,844 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:37:17,858 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-29 22:37:17,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@8c6882c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:17, skipping insertion in model container [2023-08-29 22:37:17,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:37:17,861 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 22:37:17,863 INFO L158 Benchmark]: Toolchain (without parser) took 183.69ms. Allocated memory is still 83.9MB. Free memory was 61.5MB in the beginning and 51.7MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 22:37:17,864 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 60.8MB. Free memory is still 38.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 22:37:17,864 INFO L158 Benchmark]: CACSL2BoogieTranslator took 181.95ms. Allocated memory is still 83.9MB. Free memory was 61.5MB in the beginning and 51.7MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 22:37:17,866 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 60.8MB. Free memory is still 38.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 181.95ms. Allocated memory is still 83.9MB. Free memory was 61.5MB in the beginning and 51.7MB 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: 117]: 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/chl-array-int-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 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:37:19,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:37:19,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:37:19,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:37:19,594 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:37:19,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:37:19,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:37:19,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:37:19,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:37:19,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:37:19,608 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:37:19,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:37:19,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:37:19,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:37:19,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:37:19,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:37:19,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:37:19,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:37:19,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:37:19,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:37:19,631 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:37:19,631 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:37:19,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:37:19,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:37:19,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:37:19,641 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:37:19,642 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:37:19,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:37:19,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:37:19,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:37:19,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:37:19,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:37:19,649 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:37:19,650 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:37:19,650 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:37:19,651 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:37:19,652 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:37:19,652 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:37:19,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:37:19,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:37:19,653 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:37:19,655 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 22:37:19,682 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:37:19,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:37:19,683 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:37:19,683 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:37:19,684 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:37:19,684 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:37:19,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:37:19,685 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:37:19,685 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:37:19,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:37:19,686 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:37:19,686 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:37:19,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:37:19,686 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:37:19,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:37:19,687 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:37:19,687 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:37:19,687 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:37:19,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:37:19,687 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:37:19,687 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 22:37:19,688 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 22:37:19,688 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:37:19,688 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:37:19,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:37:19,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:37:19,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:37:19,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:37:19,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:37:19,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:37:19,689 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 22:37:19,689 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 22:37:19,690 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:37:19,690 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:37:19,690 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:37:19,690 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 22:37:19,690 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:37:19,690 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:37:19,969 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:37:19,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:37:19,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:37:19,992 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:37:19,992 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:37:19,993 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c [2023-08-29 22:37:21,158 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:37:21,338 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:37:21,339 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c [2023-08-29 22:37:21,344 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ba194353/12bb2d8f185d4f0888ed7f8eb72b02d0/FLAG1f1e67892 [2023-08-29 22:37:21,358 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ba194353/12bb2d8f185d4f0888ed7f8eb72b02d0 [2023-08-29 22:37:21,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:37:21,363 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:37:21,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:37:21,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:37:21,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:37:21,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:37:21" (1/1) ... [2023-08-29 22:37:21,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c0a8aa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:21, skipping insertion in model container [2023-08-29 22:37:21,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:37:21" (1/1) ... [2023-08-29 22:37:21,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:37:21,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:37:21,569 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/chl-array-int-trans.wvr.c[2728,2741] [2023-08-29 22:37:21,583 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:37:21,602 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 22:37:21,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:37:21,639 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/chl-array-int-trans.wvr.c[2728,2741] [2023-08-29 22:37:21,643 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:37:21,651 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 22:37:21,687 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/chl-array-int-trans.wvr.c[2728,2741] [2023-08-29 22:37:21,691 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:37:21,708 INFO L208 MainTranslator]: Completed translation [2023-08-29 22:37:21,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:21 WrapperNode [2023-08-29 22:37:21,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:37:21,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 22:37:21,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 22:37:21,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 22:37:21,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:21" (1/1) ... [2023-08-29 22:37:21,737 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:21" (1/1) ... [2023-08-29 22:37:21,774 INFO L138 Inliner]: procedures = 28, calls = 49, calls flagged for inlining = 13, calls inlined = 21, statements flattened = 274 [2023-08-29 22:37:21,775 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 22:37:21,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 22:37:21,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 22:37:21,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 22:37:21,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:21" (1/1) ... [2023-08-29 22:37:21,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:21" (1/1) ... [2023-08-29 22:37:21,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:21" (1/1) ... [2023-08-29 22:37:21,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:21" (1/1) ... [2023-08-29 22:37:21,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:21" (1/1) ... [2023-08-29 22:37:21,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:21" (1/1) ... [2023-08-29 22:37:21,831 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:21" (1/1) ... [2023-08-29 22:37:21,836 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:21" (1/1) ... [2023-08-29 22:37:21,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 22:37:21,843 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 22:37:21,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 22:37:21,844 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 22:37:21,844 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:21" (1/1) ... [2023-08-29 22:37:21,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:37:21,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:37:21,874 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 22:37:21,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 22:37:21,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 22:37:21,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 22:37:21,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 22:37:21,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 22:37:21,917 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 22:37:21,917 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 22:37:21,917 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 22:37:21,917 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 22:37:21,917 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 22:37:21,917 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 22:37:21,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 22:37:21,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 22:37:21,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 22:37:21,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 22:37:21,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 22:37:21,920 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 22:37:22,092 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 22:37:22,094 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 22:37:22,728 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 22:37:22,746 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 22:37:22,747 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-29 22:37:22,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:37:22 BoogieIcfgContainer [2023-08-29 22:37:22,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 22:37:22,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 22:37:22,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 22:37:22,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 22:37:22,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:37:21" (1/3) ... [2023-08-29 22:37:22,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fbb0714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:37:22, skipping insertion in model container [2023-08-29 22:37:22,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:37:21" (2/3) ... [2023-08-29 22:37:22,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fbb0714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:37:22, skipping insertion in model container [2023-08-29 22:37:22,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:37:22" (3/3) ... [2023-08-29 22:37:22,758 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-trans.wvr.c [2023-08-29 22:37:22,774 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 22:37:22,775 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-08-29 22:37:22,775 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 22:37:22,933 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 22:37:22,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 355 transitions, 734 flow [2023-08-29 22:37:23,131 INFO L130 PetriNetUnfolder]: 28/352 cut-off events. [2023-08-29 22:37:23,131 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 22:37:23,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 352 events. 28/352 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 772 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 266. Up to 3 conditions per place. [2023-08-29 22:37:23,141 INFO L82 GeneralOperation]: Start removeDead. Operand has 337 places, 355 transitions, 734 flow [2023-08-29 22:37:23,153 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 330 places, 348 transitions, 714 flow [2023-08-29 22:37:23,157 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:37:23,189 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 330 places, 348 transitions, 714 flow [2023-08-29 22:37:23,195 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 330 places, 348 transitions, 714 flow [2023-08-29 22:37:23,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 330 places, 348 transitions, 714 flow [2023-08-29 22:37:23,256 INFO L130 PetriNetUnfolder]: 28/348 cut-off events. [2023-08-29 22:37:23,256 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 22:37:23,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 348 events. 28/348 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 770 event pairs, 0 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 266. Up to 3 conditions per place. [2023-08-29 22:37:23,270 INFO L119 LiptonReduction]: Number of co-enabled transitions 21114 [2023-08-29 22:37:54,436 INFO L134 LiptonReduction]: Checked pairs total: 32594 [2023-08-29 22:37:54,437 INFO L136 LiptonReduction]: Total number of compositions: 415 [2023-08-29 22:37:54,447 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:37:54,452 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;@c715a88, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:37:54,452 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2023-08-29 22:37:54,457 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 22:37:54,458 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:37:54,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:37:54,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:37:54,461 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 22:37:54,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:37:54,467 INFO L85 PathProgramCache]: Analyzing trace with hash 45647, now seen corresponding path program 1 times [2023-08-29 22:37:54,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:37:54,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670364852] [2023-08-29 22:37:54,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:37:54,478 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:54,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:37:54,483 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:37:54,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 22:37:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:37:54,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 22:37:54,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:37:54,758 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:37:54,759 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 [2023-08-29 22:37:54,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:37:54,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:37:54,797 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:37:54,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670364852] [2023-08-29 22:37:54,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670364852] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:37:54,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:37:54,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:37:54,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905371508] [2023-08-29 22:37:54,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:37:54,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:37:54,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:37:54,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:37:54,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:37:55,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 770 [2023-08-29 22:37:55,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:55,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:37:55,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 770 [2023-08-29 22:37:55,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:37:58,349 INFO L130 PetriNetUnfolder]: 17182/23633 cut-off events. [2023-08-29 22:37:58,350 INFO L131 PetriNetUnfolder]: For 452/452 co-relation queries the response was YES. [2023-08-29 22:37:58,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47596 conditions, 23633 events. 17182/23633 cut-off events. For 452/452 co-relation queries the response was YES. Maximal size of possible extension queue 1490. Compared 133802 event pairs, 14603 based on Foata normal form. 0/7805 useless extension candidates. Maximal degree in co-relation 45108. Up to 23465 conditions per place. [2023-08-29 22:37:58,506 INFO L137 encePairwiseOnDemand]: 761/770 looper letters, 69 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-08-29 22:37:58,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 300 flow [2023-08-29 22:37:58,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:37:58,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:37:58,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1020 transitions. [2023-08-29 22:37:58,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2023-08-29 22:37:58,524 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1020 transitions. [2023-08-29 22:37:58,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1020 transitions. [2023-08-29 22:37:58,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:37:58,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1020 transitions. [2023-08-29 22:37:58,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 340.0) internal successors, (1020), 3 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:58,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:58,547 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:58,549 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 176 flow. Second operand 3 states and 1020 transitions. [2023-08-29 22:37:58,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 300 flow [2023-08-29 22:37:58,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 288 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 22:37:58,560 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 150 flow [2023-08-29 22:37:58,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, 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=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2023-08-29 22:37:58,567 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -12 predicate places. [2023-08-29 22:37:58,568 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 150 flow [2023-08-29 22:37:58,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:58,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:37:58,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:37:58,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-29 22:37:58,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:58,789 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 22:37:58,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:37:58,790 INFO L85 PathProgramCache]: Analyzing trace with hash 45648, now seen corresponding path program 1 times [2023-08-29 22:37:58,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:37:58,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300973231] [2023-08-29 22:37:58,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:37:58,791 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:58,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:37:58,793 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:37:58,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 22:37:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:37:58,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:37:58,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:37:58,974 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 22:37:58,975 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 [2023-08-29 22:37:59,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:37:59,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:37:59,010 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:37:59,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300973231] [2023-08-29 22:37:59,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300973231] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:37:59,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:37:59,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:37:59,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307331184] [2023-08-29 22:37:59,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:37:59,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:37:59,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:37:59,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:37:59,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:37:59,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 770 [2023-08-29 22:37:59,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:59,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:37:59,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 770 [2023-08-29 22:37:59,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:04,337 INFO L130 PetriNetUnfolder]: 34363/47262 cut-off events. [2023-08-29 22:38:04,338 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2023-08-29 22:38:04,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94586 conditions, 47262 events. 34363/47262 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 2801. Compared 291677 event pairs, 29206 based on Foata normal form. 0/15889 useless extension candidates. Maximal degree in co-relation 94580. Up to 23466 conditions per place. [2023-08-29 22:38:04,558 INFO L137 encePairwiseOnDemand]: 761/770 looper letters, 130 selfloop transitions, 6 changer transitions 0/137 dead transitions. [2023-08-29 22:38:04,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 137 transitions, 560 flow [2023-08-29 22:38:04,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:38:04,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:38:04,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1081 transitions. [2023-08-29 22:38:04,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.467965367965368 [2023-08-29 22:38:04,563 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1081 transitions. [2023-08-29 22:38:04,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1081 transitions. [2023-08-29 22:38:04,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:04,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1081 transitions. [2023-08-29 22:38:04,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 360.3333333333333) internal successors, (1081), 3 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:04,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:04,574 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:04,574 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 150 flow. Second operand 3 states and 1081 transitions. [2023-08-29 22:38:04,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 137 transitions, 560 flow [2023-08-29 22:38:04,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 137 transitions, 559 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:38:04,579 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 199 flow [2023-08-29 22:38:04,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=68, 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=199, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2023-08-29 22:38:04,581 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -9 predicate places. [2023-08-29 22:38:04,581 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 199 flow [2023-08-29 22:38:04,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:04,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:04,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:38:04,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-29 22:38:04,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:04,793 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 22:38:04,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:04,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1419537, now seen corresponding path program 1 times [2023-08-29 22:38:04,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:04,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602031704] [2023-08-29 22:38:04,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:04,794 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:04,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:04,801 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:38:04,837 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 (4)] Waiting until timeout for monitored process [2023-08-29 22:38:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:04,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:38:04,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:04,989 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 22:38:04,989 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 [2023-08-29 22:38:05,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:38:05,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:38:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:38:05,248 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:05,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602031704] [2023-08-29 22:38:05,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602031704] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:38:05,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:38:05,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 22:38:05,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195155215] [2023-08-29 22:38:05,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:38:05,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:38:05,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:05,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:38:05,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:38:06,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 770 [2023-08-29 22:38:06,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 199 flow. Second operand has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:06,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:06,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 770 [2023-08-29 22:38:06,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:14,136 INFO L130 PetriNetUnfolder]: 51554/70907 cut-off events. [2023-08-29 22:38:14,136 INFO L131 PetriNetUnfolder]: For 249/249 co-relation queries the response was YES. [2023-08-29 22:38:14,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141947 conditions, 70907 events. 51554/70907 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 3744. Compared 456867 event pairs, 43809 based on Foata normal form. 0/23994 useless extension candidates. Maximal degree in co-relation 141938. Up to 23467 conditions per place. [2023-08-29 22:38:14,657 INFO L137 encePairwiseOnDemand]: 758/770 looper letters, 191 selfloop transitions, 27 changer transitions 0/219 dead transitions. [2023-08-29 22:38:14,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 219 transitions, 975 flow [2023-08-29 22:38:14,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:38:14,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:38:14,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2021 transitions. [2023-08-29 22:38:14,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43744588744588747 [2023-08-29 22:38:14,664 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2021 transitions. [2023-08-29 22:38:14,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2021 transitions. [2023-08-29 22:38:14,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:14,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2021 transitions. [2023-08-29 22:38:14,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 336.8333333333333) internal successors, (2021), 6 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:14,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 770.0) internal successors, (5390), 7 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:14,681 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 770.0) internal successors, (5390), 7 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:14,682 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 199 flow. Second operand 6 states and 2021 transitions. [2023-08-29 22:38:14,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 219 transitions, 975 flow [2023-08-29 22:38:14,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 219 transitions, 951 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:38:14,690 INFO L231 Difference]: Finished difference. Result has 79 places, 97 transitions, 391 flow [2023-08-29 22:38:14,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=79, PETRI_TRANSITIONS=97} [2023-08-29 22:38:14,694 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -2 predicate places. [2023-08-29 22:38:14,694 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 97 transitions, 391 flow [2023-08-29 22:38:14,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:14,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:14,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 22:38:14,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-29 22:38:14,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:14,896 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 22:38:14,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:14,897 INFO L85 PathProgramCache]: Analyzing trace with hash 44050835, now seen corresponding path program 1 times [2023-08-29 22:38:14,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:14,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183225196] [2023-08-29 22:38:14,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:14,898 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:14,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:14,899 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:38:14,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 22:38:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:14,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 22:38:15,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:15,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:15,081 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-29 22:38:15,081 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 [2023-08-29 22:38:15,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:15,341 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-29 22:38:15,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2023-08-29 22:38:15,611 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-08-29 22:38:15,612 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 3 case distinctions, treesize of input 55 treesize of output 80 [2023-08-29 22:38:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:38:17,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:38:17,970 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:17,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183225196] [2023-08-29 22:38:17,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183225196] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:38:17,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:38:17,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:38:17,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115123676] [2023-08-29 22:38:17,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:38:17,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:38:17,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:17,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:38:17,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2023-08-29 22:38:20,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 22:38:22,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 22:38:24,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 22:38:26,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 22:38:29,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 22:38:31,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 22:38:33,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 22:38:35,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 22:38:37,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 22:38:40,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 22:38:42,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 22:38:42,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 770 [2023-08-29 22:38:42,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 97 transitions, 391 flow. Second operand has 5 states, 5 states have (on average 266.8) internal successors, (1334), 5 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:42,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:42,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 770 [2023-08-29 22:38:42,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:47,907 INFO L130 PetriNetUnfolder]: 42450/58608 cut-off events. [2023-08-29 22:38:47,907 INFO L131 PetriNetUnfolder]: For 278/278 co-relation queries the response was YES. [2023-08-29 22:38:47,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117957 conditions, 58608 events. 42450/58608 cut-off events. For 278/278 co-relation queries the response was YES. Maximal size of possible extension queue 3019. Compared 371371 event pairs, 36099 based on Foata normal form. 0/20915 useless extension candidates. Maximal degree in co-relation 117944. Up to 58608 conditions per place. [2023-08-29 22:38:48,177 INFO L137 encePairwiseOnDemand]: 767/770 looper letters, 92 selfloop transitions, 1 changer transitions 0/93 dead transitions. [2023-08-29 22:38:48,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 93 transitions, 557 flow [2023-08-29 22:38:48,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:38:48,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:38:48,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 869 transitions. [2023-08-29 22:38:48,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2023-08-29 22:38:48,181 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 869 transitions. [2023-08-29 22:38:48,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 869 transitions. [2023-08-29 22:38:48,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:48,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 869 transitions. [2023-08-29 22:38:48,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.6666666666667) internal successors, (869), 3 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:48,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:48,189 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:48,189 INFO L175 Difference]: Start difference. First operand has 79 places, 97 transitions, 391 flow. Second operand 3 states and 869 transitions. [2023-08-29 22:38:48,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 93 transitions, 557 flow [2023-08-29 22:38:48,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 93 transitions, 527 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-29 22:38:48,193 INFO L231 Difference]: Finished difference. Result has 78 places, 93 transitions, 343 flow [2023-08-29 22:38:48,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=343, PETRI_PLACES=78, PETRI_TRANSITIONS=93} [2023-08-29 22:38:48,194 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -3 predicate places. [2023-08-29 22:38:48,194 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 93 transitions, 343 flow [2023-08-29 22:38:48,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 266.8) internal successors, (1334), 5 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:48,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:48,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 22:38:48,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-29 22:38:48,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:48,404 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 22:38:48,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:48,405 INFO L85 PathProgramCache]: Analyzing trace with hash 44050836, now seen corresponding path program 1 times [2023-08-29 22:38:48,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:48,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104036533] [2023-08-29 22:38:48,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:48,405 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:48,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:48,406 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:38:48,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-29 22:38:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:48,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 22:38:48,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:48,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:48,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:48,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:48,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:48,590 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-29 22:38:48,590 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 [2023-08-29 22:38:48,609 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-29 22:38:48,609 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 [2023-08-29 22:38:48,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:48,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:38:48,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:48,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:38:48,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:38:48,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:38:48,698 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:48,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104036533] [2023-08-29 22:38:48,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104036533] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:38:48,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:38:48,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:38:48,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377011585] [2023-08-29 22:38:48,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:38:48,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:38:48,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:48,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:38:48,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:38:49,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 770 [2023-08-29 22:38:49,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 93 transitions, 343 flow. Second operand has 4 states, 4 states have (on average 322.0) internal successors, (1288), 4 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:49,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:49,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 770 [2023-08-29 22:38:49,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:52,241 INFO L130 PetriNetUnfolder]: 27484/39019 cut-off events. [2023-08-29 22:38:52,241 INFO L131 PetriNetUnfolder]: For 261/261 co-relation queries the response was YES. [2023-08-29 22:38:52,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78375 conditions, 39019 events. 27484/39019 cut-off events. For 261/261 co-relation queries the response was YES. Maximal size of possible extension queue 2010. Compared 249941 event pairs, 23103 based on Foata normal form. 0/15833 useless extension candidates. Maximal degree in co-relation 78361. Up to 38683 conditions per place. [2023-08-29 22:38:52,412 INFO L137 encePairwiseOnDemand]: 767/770 looper letters, 87 selfloop transitions, 1 changer transitions 0/89 dead transitions. [2023-08-29 22:38:52,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 89 transitions, 499 flow [2023-08-29 22:38:52,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:38:52,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:38:52,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1031 transitions. [2023-08-29 22:38:52,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44632034632034634 [2023-08-29 22:38:52,416 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1031 transitions. [2023-08-29 22:38:52,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1031 transitions. [2023-08-29 22:38:52,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:52,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1031 transitions. [2023-08-29 22:38:52,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 343.6666666666667) internal successors, (1031), 3 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:52,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:52,424 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:52,424 INFO L175 Difference]: Start difference. First operand has 78 places, 93 transitions, 343 flow. Second operand 3 states and 1031 transitions. [2023-08-29 22:38:52,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 89 transitions, 499 flow [2023-08-29 22:38:52,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 89 transitions, 498 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:38:52,427 INFO L231 Difference]: Finished difference. Result has 77 places, 89 transitions, 324 flow [2023-08-29 22:38:52,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=77, PETRI_TRANSITIONS=89} [2023-08-29 22:38:52,428 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -4 predicate places. [2023-08-29 22:38:52,428 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 89 transitions, 324 flow [2023-08-29 22:38:52,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 322.0) internal successors, (1288), 4 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:52,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:52,429 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 22:38:52,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-29 22:38:52,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:52,640 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 22:38:52,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:52,640 INFO L85 PathProgramCache]: Analyzing trace with hash -655828336, now seen corresponding path program 2 times [2023-08-29 22:38:52,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:52,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72328492] [2023-08-29 22:38:52,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:38:52,641 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:52,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:52,642 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:38:52,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 22:38:52,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:38:52,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:38:52,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 22:38:52,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:52,840 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 22:38:52,840 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 [2023-08-29 22:38:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:38:52,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:38:53,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:38:53,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:53,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72328492] [2023-08-29 22:38:53,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72328492] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:38:53,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:38:53,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 22:38:53,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657192347] [2023-08-29 22:38:53,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:38:53,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 22:38:53,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:53,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 22:38:53,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:38:59,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 770 [2023-08-29 22:38:59,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 89 transitions, 324 flow. Second operand has 12 states, 12 states have (on average 303.0) internal successors, (3636), 12 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:59,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:59,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 770 [2023-08-29 22:38:59,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:02,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:39:04,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:39:06,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:39:08,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:39:10,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:39:12,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:39:13,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:39:15,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:39:17,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:39:19,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:39:22,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:39:33,381 INFO L130 PetriNetUnfolder]: 73279/104024 cut-off events. [2023-08-29 22:39:33,381 INFO L131 PetriNetUnfolder]: For 721/721 co-relation queries the response was YES. [2023-08-29 22:39:33,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208871 conditions, 104024 events. 73279/104024 cut-off events. For 721/721 co-relation queries the response was YES. Maximal size of possible extension queue 3970. Compared 727746 event pairs, 61608 based on Foata normal form. 15/43182 useless extension candidates. Maximal degree in co-relation 208856. Up to 12906 conditions per place. [2023-08-29 22:39:33,987 INFO L137 encePairwiseOnDemand]: 760/770 looper letters, 464 selfloop transitions, 48 changer transitions 0/513 dead transitions. [2023-08-29 22:39:33,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 513 transitions, 2366 flow [2023-08-29 22:39:33,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 22:39:33,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 22:39:33,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 4151 transitions. [2023-08-29 22:39:33,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4492424242424242 [2023-08-29 22:39:33,997 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 4151 transitions. [2023-08-29 22:39:33,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 4151 transitions. [2023-08-29 22:39:33,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:33,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 4151 transitions. [2023-08-29 22:39:34,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 345.9166666666667) internal successors, (4151), 12 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:34,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 770.0) internal successors, (10010), 13 states have internal predecessors, (10010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:34,017 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 770.0) internal successors, (10010), 13 states have internal predecessors, (10010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:34,017 INFO L175 Difference]: Start difference. First operand has 77 places, 89 transitions, 324 flow. Second operand 12 states and 4151 transitions. [2023-08-29 22:39:34,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 513 transitions, 2366 flow [2023-08-29 22:39:34,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 513 transitions, 2365 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:39:34,025 INFO L231 Difference]: Finished difference. Result has 94 places, 116 transitions, 668 flow [2023-08-29 22:39:34,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=668, PETRI_PLACES=94, PETRI_TRANSITIONS=116} [2023-08-29 22:39:34,026 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 13 predicate places. [2023-08-29 22:39:34,026 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 116 transitions, 668 flow [2023-08-29 22:39:34,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 303.0) internal successors, (3636), 12 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:34,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:34,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 22:39:34,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-29 22:39:34,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:34,237 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 22:39:34,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:34,237 INFO L85 PathProgramCache]: Analyzing trace with hash -616786858, now seen corresponding path program 1 times [2023-08-29 22:39:34,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:34,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586876793] [2023-08-29 22:39:34,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:34,238 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:34,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:34,239 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:39:34,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 22:39:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:34,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 22:39:34,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:34,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:39:34,402 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-29 22:39:34,402 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 [2023-08-29 22:39:34,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:39:34,470 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 [2023-08-29 22:39:34,506 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 22:39:34,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:39:34,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:39:34,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:39:34,536 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:34,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586876793] [2023-08-29 22:39:34,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586876793] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:39:34,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:39:34,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:39:34,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219418364] [2023-08-29 22:39:34,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:39:34,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:39:34,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:34,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:39:34,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:39:34,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 770 [2023-08-29 22:39:34,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 116 transitions, 668 flow. Second operand has 4 states, 4 states have (on average 322.5) internal successors, (1290), 4 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:34,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:34,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 770 [2023-08-29 22:39:34,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:44,011 INFO L130 PetriNetUnfolder]: 71647/101552 cut-off events. [2023-08-29 22:39:44,011 INFO L131 PetriNetUnfolder]: For 743/743 co-relation queries the response was YES. [2023-08-29 22:39:44,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204033 conditions, 101552 events. 71647/101552 cut-off events. For 743/743 co-relation queries the response was YES. Maximal size of possible extension queue 3466. Compared 702077 event pairs, 60208 based on Foata normal form. 0/41670 useless extension candidates. Maximal degree in co-relation 204010. Up to 100656 conditions per place. [2023-08-29 22:39:44,568 INFO L137 encePairwiseOnDemand]: 767/770 looper letters, 112 selfloop transitions, 1 changer transitions 0/114 dead transitions. [2023-08-29 22:39:44,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 114 transitions, 890 flow [2023-08-29 22:39:44,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:39:44,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:39:44,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1029 transitions. [2023-08-29 22:39:44,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2023-08-29 22:39:44,571 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1029 transitions. [2023-08-29 22:39:44,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1029 transitions. [2023-08-29 22:39:44,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:44,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1029 transitions. [2023-08-29 22:39:44,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 343.0) internal successors, (1029), 3 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:44,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:44,577 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:44,578 INFO L175 Difference]: Start difference. First operand has 94 places, 116 transitions, 668 flow. Second operand 3 states and 1029 transitions. [2023-08-29 22:39:44,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 114 transitions, 890 flow [2023-08-29 22:39:44,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 114 transitions, 796 flow, removed 22 selfloop flow, removed 4 redundant places. [2023-08-29 22:39:44,582 INFO L231 Difference]: Finished difference. Result has 90 places, 114 transitions, 572 flow [2023-08-29 22:39:44,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=572, PETRI_PLACES=90, PETRI_TRANSITIONS=114} [2023-08-29 22:39:44,583 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 9 predicate places. [2023-08-29 22:39:44,583 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 114 transitions, 572 flow [2023-08-29 22:39:44,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 322.5) internal successors, (1290), 4 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:44,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:44,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 22:39:44,595 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 (8)] Ended with exit code 0 [2023-08-29 22:39:44,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:44,793 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 22:39:44,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:44,794 INFO L85 PathProgramCache]: Analyzing trace with hash -616786859, now seen corresponding path program 1 times [2023-08-29 22:39:44,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:44,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [759205122] [2023-08-29 22:39:44,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:44,794 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:44,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:44,795 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:39:44,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 22:39:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:44,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 22:39:44,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:44,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:39:44,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:39:44,959 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-08-29 22:39:44,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2023-08-29 22:39:44,973 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 39 treesize of output 37 [2023-08-29 22:39:45,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:39:45,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:39:45,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:39:45,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:39:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:39:45,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:39:45,094 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:45,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [759205122] [2023-08-29 22:39:45,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [759205122] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:39:45,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:39:45,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:39:45,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124027470] [2023-08-29 22:39:45,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:39:45,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:39:45,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:45,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:39:45,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:39:45,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 770 [2023-08-29 22:39:45,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 114 transitions, 572 flow. Second operand has 4 states, 4 states have (on average 322.5) internal successors, (1290), 4 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:45,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:45,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 770 [2023-08-29 22:39:45,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:54,668 INFO L130 PetriNetUnfolder]: 70015/99080 cut-off events. [2023-08-29 22:39:54,669 INFO L131 PetriNetUnfolder]: For 768/768 co-relation queries the response was YES. [2023-08-29 22:39:54,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199034 conditions, 99080 events. 70015/99080 cut-off events. For 768/768 co-relation queries the response was YES. Maximal size of possible extension queue 3641. Compared 685763 event pairs, 58808 based on Foata normal form. 0/41144 useless extension candidates. Maximal degree in co-relation 199010. Up to 98184 conditions per place. [2023-08-29 22:39:55,350 INFO L137 encePairwiseOnDemand]: 767/770 looper letters, 110 selfloop transitions, 1 changer transitions 0/112 dead transitions. [2023-08-29 22:39:55,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 112 transitions, 790 flow [2023-08-29 22:39:55,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:39:55,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:39:55,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1027 transitions. [2023-08-29 22:39:55,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4445887445887446 [2023-08-29 22:39:55,353 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1027 transitions. [2023-08-29 22:39:55,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1027 transitions. [2023-08-29 22:39:55,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:55,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1027 transitions. [2023-08-29 22:39:55,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 342.3333333333333) internal successors, (1027), 3 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:55,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:55,357 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:55,358 INFO L175 Difference]: Start difference. First operand has 90 places, 114 transitions, 572 flow. Second operand 3 states and 1027 transitions. [2023-08-29 22:39:55,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 112 transitions, 790 flow [2023-08-29 22:39:55,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 112 transitions, 789 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:39:55,362 INFO L231 Difference]: Finished difference. Result has 89 places, 112 transitions, 569 flow [2023-08-29 22:39:55,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=569, PETRI_PLACES=89, PETRI_TRANSITIONS=112} [2023-08-29 22:39:55,362 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 8 predicate places. [2023-08-29 22:39:55,363 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 112 transitions, 569 flow [2023-08-29 22:39:55,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 322.5) internal successors, (1290), 4 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:55,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:55,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:39:55,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-29 22:39:55,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:55,580 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 22:39:55,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:55,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1940525924, now seen corresponding path program 1 times [2023-08-29 22:39:55,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:55,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117299961] [2023-08-29 22:39:55,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:55,581 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:55,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:55,582 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:39:55,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 22:39:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:55,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:39:55,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:39:55,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:39:55,708 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:55,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117299961] [2023-08-29 22:39:55,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117299961] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:39:55,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:39:55,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:39:55,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850696089] [2023-08-29 22:39:55,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:39:55,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:39:55,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:55,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:39:55,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:39:55,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 770 [2023-08-29 22:39:55,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 112 transitions, 569 flow. Second operand has 5 states, 5 states have (on average 313.4) internal successors, (1567), 5 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:55,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:55,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 770 [2023-08-29 22:39:55,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:40:06,947 INFO L130 PetriNetUnfolder]: 85290/121808 cut-off events. [2023-08-29 22:40:06,948 INFO L131 PetriNetUnfolder]: For 828/828 co-relation queries the response was YES. [2023-08-29 22:40:07,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244879 conditions, 121808 events. 85290/121808 cut-off events. For 828/828 co-relation queries the response was YES. Maximal size of possible extension queue 4413. Compared 886150 event pairs, 61064 based on Foata normal form. 0/54960 useless extension candidates. Maximal degree in co-relation 244854. Up to 98183 conditions per place. [2023-08-29 22:40:07,818 INFO L137 encePairwiseOnDemand]: 761/770 looper letters, 209 selfloop transitions, 4 changer transitions 0/214 dead transitions. [2023-08-29 22:40:07,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 214 transitions, 1406 flow [2023-08-29 22:40:07,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:40:07,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:40:07,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1702 transitions. [2023-08-29 22:40:07,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44207792207792207 [2023-08-29 22:40:07,821 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1702 transitions. [2023-08-29 22:40:07,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1702 transitions. [2023-08-29 22:40:07,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:40:07,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1702 transitions. [2023-08-29 22:40:07,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 340.4) internal successors, (1702), 5 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:07,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 770.0) internal successors, (4620), 6 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:07,829 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 770.0) internal successors, (4620), 6 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:07,829 INFO L175 Difference]: Start difference. First operand has 89 places, 112 transitions, 569 flow. Second operand 5 states and 1702 transitions. [2023-08-29 22:40:07,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 214 transitions, 1406 flow [2023-08-29 22:40:07,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 214 transitions, 1405 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:40:07,836 INFO L231 Difference]: Finished difference. Result has 94 places, 113 transitions, 593 flow [2023-08-29 22:40:07,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=593, PETRI_PLACES=94, PETRI_TRANSITIONS=113} [2023-08-29 22:40:07,836 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 13 predicate places. [2023-08-29 22:40:07,837 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 113 transitions, 593 flow [2023-08-29 22:40:07,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 313.4) internal successors, (1567), 5 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:07,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:40:07,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:40:07,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-29 22:40:08,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:40:08,046 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 22:40:08,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:40:08,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1975384452, now seen corresponding path program 1 times [2023-08-29 22:40:08,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:40:08,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404642519] [2023-08-29 22:40:08,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:40:08,047 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:40:08,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:40:08,048 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:40:08,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 22:40:08,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:40:08,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:40:08,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:40:08,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:40:08,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:40:08,196 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:40:08,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404642519] [2023-08-29 22:40:08,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404642519] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:40:08,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:40:08,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:40:08,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756923358] [2023-08-29 22:40:08,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:40:08,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:40:08,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:40:08,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:40:08,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:40:08,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 770 [2023-08-29 22:40:08,421 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 113 transitions, 593 flow. Second operand has 5 states, 5 states have (on average 313.6) internal successors, (1568), 5 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:08,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:40:08,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 770 [2023-08-29 22:40:08,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:40:23,831 INFO L130 PetriNetUnfolder]: 115820/167158 cut-off events. [2023-08-29 22:40:23,831 INFO L131 PetriNetUnfolder]: For 18470/18470 co-relation queries the response was YES. [2023-08-29 22:40:24,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357074 conditions, 167158 events. 115820/167158 cut-off events. For 18470/18470 co-relation queries the response was YES. Maximal size of possible extension queue 5871. Compared 1288038 event pairs, 76632 based on Foata normal form. 1888/84102 useless extension candidates. Maximal degree in co-relation 357046. Up to 120836 conditions per place. [2023-08-29 22:40:24,911 INFO L137 encePairwiseOnDemand]: 761/770 looper letters, 179 selfloop transitions, 15 changer transitions 0/195 dead transitions. [2023-08-29 22:40:24,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 195 transitions, 1240 flow [2023-08-29 22:40:24,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:40:24,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:40:24,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1699 transitions. [2023-08-29 22:40:24,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412987012987013 [2023-08-29 22:40:24,915 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1699 transitions. [2023-08-29 22:40:24,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1699 transitions. [2023-08-29 22:40:24,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:40:24,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1699 transitions. [2023-08-29 22:40:24,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 339.8) internal successors, (1699), 5 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:24,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 770.0) internal successors, (4620), 6 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:24,921 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 770.0) internal successors, (4620), 6 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:24,921 INFO L175 Difference]: Start difference. First operand has 94 places, 113 transitions, 593 flow. Second operand 5 states and 1699 transitions. [2023-08-29 22:40:24,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 195 transitions, 1240 flow [2023-08-29 22:40:25,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 195 transitions, 1234 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-29 22:40:25,110 INFO L231 Difference]: Finished difference. Result has 99 places, 115 transitions, 646 flow [2023-08-29 22:40:25,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=646, PETRI_PLACES=99, PETRI_TRANSITIONS=115} [2023-08-29 22:40:25,110 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 18 predicate places. [2023-08-29 22:40:25,111 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 115 transitions, 646 flow [2023-08-29 22:40:25,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 313.6) internal successors, (1568), 5 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:25,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:40:25,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:40:25,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 22:40:25,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:40:25,314 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 22:40:25,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:40:25,315 INFO L85 PathProgramCache]: Analyzing trace with hash -26653916, now seen corresponding path program 1 times [2023-08-29 22:40:25,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:40:25,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516426440] [2023-08-29 22:40:25,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:40:25,316 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:40:25,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:40:25,317 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:40:25,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 22:40:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:40:25,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 22:40:25,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:40:25,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:40:25,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:40:25,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:40:25,538 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:40:25,539 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 [2023-08-29 22:40:25,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-08-29 22:40:25,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:40:25,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:40:25,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:40:25,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:40:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:40:25,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:40:25,690 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:40:25,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516426440] [2023-08-29 22:40:25,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516426440] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:40:25,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:40:25,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:40:25,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354073682] [2023-08-29 22:40:25,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:40:25,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:40:25,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:40:25,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:40:25,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:40:26,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 770 [2023-08-29 22:40:26,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 115 transitions, 646 flow. Second operand has 5 states, 5 states have (on average 320.6) internal successors, (1603), 5 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:26,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:40:26,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 770 [2023-08-29 22:40:26,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:40:41,023 INFO L130 PetriNetUnfolder]: 110836/159486 cut-off events. [2023-08-29 22:40:41,023 INFO L131 PetriNetUnfolder]: For 52623/52623 co-relation queries the response was YES. [2023-08-29 22:40:41,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360296 conditions, 159486 events. 110836/159486 cut-off events. For 52623/52623 co-relation queries the response was YES. Maximal size of possible extension queue 5641. Compared 1199788 event pairs, 94368 based on Foata normal form. 0/78542 useless extension candidates. Maximal degree in co-relation 360266. Up to 158534 conditions per place. [2023-08-29 22:40:42,278 INFO L137 encePairwiseOnDemand]: 767/770 looper letters, 111 selfloop transitions, 1 changer transitions 0/113 dead transitions. [2023-08-29 22:40:42,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 113 transitions, 866 flow [2023-08-29 22:40:42,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:40:42,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:40:42,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1019 transitions. [2023-08-29 22:40:42,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44112554112554114 [2023-08-29 22:40:42,281 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1019 transitions. [2023-08-29 22:40:42,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1019 transitions. [2023-08-29 22:40:42,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:40:42,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1019 transitions. [2023-08-29 22:40:42,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 339.6666666666667) internal successors, (1019), 3 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:42,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:42,285 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:42,285 INFO L175 Difference]: Start difference. First operand has 99 places, 115 transitions, 646 flow. Second operand 3 states and 1019 transitions. [2023-08-29 22:40:42,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 113 transitions, 866 flow [2023-08-29 22:40:42,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 113 transitions, 850 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-29 22:40:42,412 INFO L231 Difference]: Finished difference. Result has 98 places, 113 transitions, 628 flow [2023-08-29 22:40:42,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=628, PETRI_PLACES=98, PETRI_TRANSITIONS=113} [2023-08-29 22:40:42,413 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 17 predicate places. [2023-08-29 22:40:42,413 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 113 transitions, 628 flow [2023-08-29 22:40:42,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 320.6) internal successors, (1603), 5 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:42,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:40:42,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:40:42,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-29 22:40:42,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:40:42,623 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 22:40:42,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:40:42,623 INFO L85 PathProgramCache]: Analyzing trace with hash -26653915, now seen corresponding path program 1 times [2023-08-29 22:40:42,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:40:42,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567190972] [2023-08-29 22:40:42,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:40:42,624 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:40:42,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:40:42,625 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:40:42,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 22:40:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:40:42,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 22:40:42,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:40:42,782 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-29 22:40:42,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-08-29 22:40:42,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:40:42,820 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 [2023-08-29 22:40:42,850 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 22:40:42,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:40:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:40:42,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:40:42,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:40:42,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567190972] [2023-08-29 22:40:42,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567190972] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:40:42,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:40:42,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:40:42,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699360540] [2023-08-29 22:40:42,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:40:42,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:40:42,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:40:42,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:40:42,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:40:43,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 770 [2023-08-29 22:40:43,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 113 transitions, 628 flow. Second operand has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:43,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:40:43,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 770 [2023-08-29 22:40:43,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:40:57,494 INFO L130 PetriNetUnfolder]: 105852/151750 cut-off events. [2023-08-29 22:40:57,494 INFO L131 PetriNetUnfolder]: For 49732/49732 co-relation queries the response was YES. [2023-08-29 22:40:58,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342667 conditions, 151750 events. 105852/151750 cut-off events. For 49732/49732 co-relation queries the response was YES. Maximal size of possible extension queue 5378. Compared 1126637 event pairs, 89992 based on Foata normal form. 0/76198 useless extension candidates. Maximal degree in co-relation 342636. Up to 150934 conditions per place. [2023-08-29 22:40:58,646 INFO L137 encePairwiseOnDemand]: 767/770 looper letters, 109 selfloop transitions, 1 changer transitions 0/111 dead transitions. [2023-08-29 22:40:58,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 111 transitions, 844 flow [2023-08-29 22:40:58,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:40:58,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:40:58,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1011 transitions. [2023-08-29 22:40:58,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43766233766233764 [2023-08-29 22:40:58,649 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1011 transitions. [2023-08-29 22:40:58,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1011 transitions. [2023-08-29 22:40:58,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:40:58,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1011 transitions. [2023-08-29 22:40:58,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 337.0) internal successors, (1011), 3 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:58,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:58,653 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:58,653 INFO L175 Difference]: Start difference. First operand has 98 places, 113 transitions, 628 flow. Second operand 3 states and 1011 transitions. [2023-08-29 22:40:58,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 111 transitions, 844 flow [2023-08-29 22:40:58,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 111 transitions, 843 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:40:58,759 INFO L231 Difference]: Finished difference. Result has 97 places, 111 transitions, 625 flow [2023-08-29 22:40:58,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=625, PETRI_PLACES=97, PETRI_TRANSITIONS=111} [2023-08-29 22:40:58,759 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 16 predicate places. [2023-08-29 22:40:58,759 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 111 transitions, 625 flow [2023-08-29 22:40:58,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:58,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:40:58,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:40:58,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-29 22:40:58,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:40:58,961 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 22:40:58,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:40:58,961 INFO L85 PathProgramCache]: Analyzing trace with hash -826278709, now seen corresponding path program 1 times [2023-08-29 22:40:58,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:40:58,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989902435] [2023-08-29 22:40:58,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:40:58,962 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:40:58,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:40:58,963 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:40:58,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 22:40:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:40:59,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 22:40:59,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:40:59,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 22:40:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:40:59,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:40:59,139 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:40:59,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989902435] [2023-08-29 22:40:59,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989902435] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:40:59,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:40:59,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:40:59,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993270486] [2023-08-29 22:40:59,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:40:59,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:40:59,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:40:59,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:40:59,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:40:59,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 770 [2023-08-29 22:40:59,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 111 transitions, 625 flow. Second operand has 5 states, 5 states have (on average 312.8) internal successors, (1564), 5 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:59,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:40:59,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 770 [2023-08-29 22:40:59,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand