./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-node-subst.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-node-subst.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 97832baecac12bd55b66fbc3c6c38a25db85e9dc70cfa8f34b5e7a9e59086f06 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 01:41:08,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:41:08,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:41:08,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:41:08,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:41:08,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:41:08,748 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:41:08,750 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:41:08,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:41:08,757 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:41:08,758 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:41:08,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:41:08,760 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:41:08,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:41:08,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:41:08,767 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:41:08,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:41:08,769 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:41:08,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:41:08,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:41:08,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:41:08,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:41:08,784 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:41:08,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:41:08,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:41:08,793 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:41:08,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:41:08,796 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:41:08,797 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:41:08,798 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:41:08,798 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:41:08,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:41:08,801 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:41:08,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:41:08,803 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:41:08,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:41:08,803 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:41:08,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:41:08,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:41:08,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:41:08,805 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:41:08,807 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 01:41:08,841 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:41:08,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:41:08,842 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:41:08,843 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:41:08,843 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:41:08,844 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:41:08,844 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:41:08,844 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:41:08,845 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:41:08,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:41:08,846 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:41:08,846 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:41:08,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:41:08,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:41:08,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:41:08,847 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:41:08,847 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:41:08,847 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:41:08,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:41:08,847 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:41:08,848 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:41:08,848 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:41:08,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:41:08,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:41:08,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:41:08,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:41:08,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:41:08,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:41:08,849 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 01:41:08,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 01:41:08,850 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:41:08,850 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:41:08,850 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:41:08,850 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:41:08,851 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97832baecac12bd55b66fbc3c6c38a25db85e9dc70cfa8f34b5e7a9e59086f06 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:41:09,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:41:09,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:41:09,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:41:09,184 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:41:09,184 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:41:09,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-node-subst.wvr.c [2023-09-01 01:41:10,293 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:41:10,501 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:41:10,501 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-subst.wvr.c [2023-09-01 01:41:10,509 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57cb26021/eab5fba4af3746f481befbe4154c6c1d/FLAGc200fe849 [2023-09-01 01:41:10,523 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57cb26021/eab5fba4af3746f481befbe4154c6c1d [2023-09-01 01:41:10,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:41:10,526 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:41:10,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:41:10,529 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:41:10,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:41:10,532 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:41:10" (1/1) ... [2023-09-01 01:41:10,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2314636f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:41:10, skipping insertion in model container [2023-09-01 01:41:10,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:41:10" (1/1) ... [2023-09-01 01:41:10,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:41:10,573 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:41:10,769 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-node-subst.wvr.c[3996,4009] [2023-09-01 01:41:10,797 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:41:10,813 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 01:41:10,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2af2d439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:41:10, skipping insertion in model container [2023-09-01 01:41:10,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:41:10,816 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 01:41:10,818 INFO L158 Benchmark]: Toolchain (without parser) took 290.32ms. Allocated memory is still 75.5MB. Free memory was 54.2MB in the beginning and 43.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 01:41:10,818 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 60.8MB. Free memory is still 38.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 01:41:10,819 INFO L158 Benchmark]: CACSL2BoogieTranslator took 287.51ms. Allocated memory is still 75.5MB. Free memory was 54.1MB in the beginning and 43.7MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 01:41:10,821 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 60.8MB. Free memory is still 38.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 287.51ms. Allocated memory is still 75.5MB. Free memory was 54.1MB in the beginning and 43.7MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 118]: 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-node-subst.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 97832baecac12bd55b66fbc3c6c38a25db85e9dc70cfa8f34b5e7a9e59086f06 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 01:41:12,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:41:12,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:41:12,557 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:41:12,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:41:12,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:41:12,566 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:41:12,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:41:12,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:41:12,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:41:12,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:41:12,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:41:12,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:41:12,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:41:12,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:41:12,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:41:12,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:41:12,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:41:12,592 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:41:12,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:41:12,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:41:12,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:41:12,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:41:12,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:41:12,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:41:12,612 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:41:12,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:41:12,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:41:12,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:41:12,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:41:12,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:41:12,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:41:12,624 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:41:12,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:41:12,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:41:12,626 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:41:12,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:41:12,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:41:12,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:41:12,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:41:12,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:41:12,630 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 01:41:12,663 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:41:12,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:41:12,665 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:41:12,665 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:41:12,666 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:41:12,666 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:41:12,667 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:41:12,667 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:41:12,667 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:41:12,667 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:41:12,668 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:41:12,668 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:41:12,668 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:41:12,669 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:41:12,669 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:41:12,669 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:41:12,669 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:41:12,669 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:41:12,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:41:12,670 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:41:12,670 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 01:41:12,670 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 01:41:12,670 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:41:12,670 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:41:12,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:41:12,671 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:41:12,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:41:12,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:41:12,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:41:12,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:41:12,672 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 01:41:12,672 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 01:41:12,672 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:41:12,673 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:41:12,673 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:41:12,673 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 01:41:12,673 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:41:12,673 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97832baecac12bd55b66fbc3c6c38a25db85e9dc70cfa8f34b5e7a9e59086f06 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:41:12,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:41:12,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:41:12,996 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:41:12,997 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:41:12,997 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:41:12,998 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-node-subst.wvr.c [2023-09-01 01:41:14,232 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:41:14,460 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:41:14,466 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-subst.wvr.c [2023-09-01 01:41:14,474 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da7389d03/4ad5830da5d74fd6add17502e7bf75f0/FLAGe42729c69 [2023-09-01 01:41:14,499 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da7389d03/4ad5830da5d74fd6add17502e7bf75f0 [2023-09-01 01:41:14,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:41:14,503 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:41:14,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:41:14,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:41:14,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:41:14,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:41:14" (1/1) ... [2023-09-01 01:41:14,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10f0ae58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:41:14, skipping insertion in model container [2023-09-01 01:41:14,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:41:14" (1/1) ... [2023-09-01 01:41:14,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:41:14,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:41:14,767 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-node-subst.wvr.c[3996,4009] [2023-09-01 01:41:14,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:41:14,809 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 01:41:14,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:41:14,849 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-node-subst.wvr.c[3996,4009] [2023-09-01 01:41:14,860 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:41:14,866 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 01:41:14,886 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-node-subst.wvr.c[3996,4009] [2023-09-01 01:41:14,904 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:41:14,919 INFO L208 MainTranslator]: Completed translation [2023-09-01 01:41:14,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:41:14 WrapperNode [2023-09-01 01:41:14,919 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:41:14,920 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 01:41:14,921 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 01:41:14,921 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 01:41:14,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:41:14" (1/1) ... [2023-09-01 01:41:14,953 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:41:14" (1/1) ... [2023-09-01 01:41:15,003 INFO L138 Inliner]: procedures = 29, calls = 66, calls flagged for inlining = 22, calls inlined = 34, statements flattened = 413 [2023-09-01 01:41:15,011 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 01:41:15,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 01:41:15,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 01:41:15,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 01:41:15,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:41:14" (1/1) ... [2023-09-01 01:41:15,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:41:14" (1/1) ... [2023-09-01 01:41:15,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:41:14" (1/1) ... [2023-09-01 01:41:15,039 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:41:14" (1/1) ... [2023-09-01 01:41:15,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:41:14" (1/1) ... [2023-09-01 01:41:15,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:41:14" (1/1) ... [2023-09-01 01:41:15,079 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:41:14" (1/1) ... [2023-09-01 01:41:15,087 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:41:14" (1/1) ... [2023-09-01 01:41:15,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 01:41:15,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 01:41:15,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 01:41:15,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 01:41:15,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:41:14" (1/1) ... [2023-09-01 01:41:15,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:41:15,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:41:15,123 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 01:41:15,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 01:41:15,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 01:41:15,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2023-09-01 01:41:15,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 01:41:15,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 01:41:15,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 01:41:15,154 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 01:41:15,154 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 01:41:15,154 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 01:41:15,154 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 01:41:15,154 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 01:41:15,155 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 01:41:15,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 01:41:15,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 01:41:15,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 01:41:15,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2023-09-01 01:41:15,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 01:41:15,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 01:41:15,156 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 01:41:15,304 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 01:41:15,306 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 01:41:16,296 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 01:41:16,313 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 01:41:16,316 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 01:41:16,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:41:16 BoogieIcfgContainer [2023-09-01 01:41:16,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 01:41:16,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 01:41:16,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 01:41:16,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 01:41:16,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:41:14" (1/3) ... [2023-09-01 01:41:16,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6716bb83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:41:16, skipping insertion in model container [2023-09-01 01:41:16,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:41:14" (2/3) ... [2023-09-01 01:41:16,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6716bb83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:41:16, skipping insertion in model container [2023-09-01 01:41:16,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:41:16" (3/3) ... [2023-09-01 01:41:16,328 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-subst.wvr.c [2023-09-01 01:41:16,344 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 01:41:16,344 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2023-09-01 01:41:16,345 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 01:41:16,489 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 01:41:16,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 516 places, 547 transitions, 1118 flow [2023-09-01 01:41:16,719 INFO L130 PetriNetUnfolder]: 41/544 cut-off events. [2023-09-01 01:41:16,719 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 01:41:16,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 544 events. 41/544 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1006 event pairs, 0 based on Foata normal form. 0/441 useless extension candidates. Maximal degree in co-relation 450. Up to 2 conditions per place. [2023-09-01 01:41:16,729 INFO L82 GeneralOperation]: Start removeDead. Operand has 516 places, 547 transitions, 1118 flow [2023-09-01 01:41:16,741 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 509 places, 540 transitions, 1098 flow [2023-09-01 01:41:16,746 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 01:41:16,760 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 509 places, 540 transitions, 1098 flow [2023-09-01 01:41:16,764 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 509 places, 540 transitions, 1098 flow [2023-09-01 01:41:16,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 509 places, 540 transitions, 1098 flow [2023-09-01 01:41:16,852 INFO L130 PetriNetUnfolder]: 41/540 cut-off events. [2023-09-01 01:41:16,852 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 01:41:16,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 540 events. 41/540 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 997 event pairs, 0 based on Foata normal form. 0/438 useless extension candidates. Maximal degree in co-relation 450. Up to 2 conditions per place. [2023-09-01 01:41:16,871 INFO L119 LiptonReduction]: Number of co-enabled transitions 27258 [2023-09-01 01:42:17,112 INFO L134 LiptonReduction]: Checked pairs total: 51998 [2023-09-01 01:42:17,113 INFO L136 LiptonReduction]: Total number of compositions: 662 [2023-09-01 01:42:17,123 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 01:42:17,128 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;@76c7cfe2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 01:42:17,129 INFO L358 AbstractCegarLoop]: Starting to check reachability of 101 error locations. [2023-09-01 01:42:17,137 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 01:42:17,137 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 01:42:17,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:42:17,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:42:17,139 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-09-01 01:42:17,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:42:17,143 INFO L85 PathProgramCache]: Analyzing trace with hash 68331, now seen corresponding path program 1 times [2023-09-01 01:42:17,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:42:17,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706534320] [2023-09-01 01:42:17,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:42:17,154 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:42:17,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:42:17,165 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:42:17,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 01:42:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:42:17,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 01:42:17,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:42:17,433 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:42:17,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 01:42:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:42:17,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:42:17,472 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:42:17,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706534320] [2023-09-01 01:42:17,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706534320] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:42:17,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:42:17,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:42:17,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867683563] [2023-09-01 01:42:17,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:42:17,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:42:17,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:42:17,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:42:17,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:42:17,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 496 out of 1209 [2023-09-01 01:42:17,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 103 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 496.6666666666667) internal successors, (1490), 3 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:17,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:42:17,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 496 of 1209 [2023-09-01 01:42:17,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:42:23,410 INFO L130 PetriNetUnfolder]: 28355/39551 cut-off events. [2023-09-01 01:42:23,410 INFO L131 PetriNetUnfolder]: For 695/695 co-relation queries the response was YES. [2023-09-01 01:42:23,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79738 conditions, 39551 events. 28355/39551 cut-off events. For 695/695 co-relation queries the response was YES. Maximal size of possible extension queue 2019. Compared 242780 event pairs, 26445 based on Foata normal form. 0/12074 useless extension candidates. Maximal degree in co-relation 76220. Up to 39423 conditions per place. [2023-09-01 01:42:23,654 INFO L137 encePairwiseOnDemand]: 1199/1209 looper letters, 87 selfloop transitions, 1 changer transitions 0/94 dead transitions. [2023-09-01 01:42:23,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 94 transitions, 382 flow [2023-09-01 01:42:23,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:42:23,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:42:23,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1585 transitions. [2023-09-01 01:42:23,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43700027570995315 [2023-09-01 01:42:23,676 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1585 transitions. [2023-09-01 01:42:23,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1585 transitions. [2023-09-01 01:42:23,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:42:23,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1585 transitions. [2023-09-01 01:42:23,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 528.3333333333334) internal successors, (1585), 3 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:23,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:23,709 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:23,711 INFO L175 Difference]: Start difference. First operand has 103 places, 103 transitions, 224 flow. Second operand 3 states and 1585 transitions. [2023-09-01 01:42:23,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 94 transitions, 382 flow [2023-09-01 01:42:23,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 94 transitions, 370 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 01:42:23,731 INFO L231 Difference]: Finished difference. Result has 91 places, 94 transitions, 196 flow [2023-09-01 01:42:23,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=91, PETRI_TRANSITIONS=94} [2023-09-01 01:42:23,738 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -12 predicate places. [2023-09-01 01:42:23,738 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 94 transitions, 196 flow [2023-09-01 01:42:23,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 496.6666666666667) internal successors, (1490), 3 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:23,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:42:23,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:42:23,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-09-01 01:42:23,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:42:23,953 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-09-01 01:42:23,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:42:23,954 INFO L85 PathProgramCache]: Analyzing trace with hash 68332, now seen corresponding path program 1 times [2023-09-01 01:42:23,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:42:23,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919370170] [2023-09-01 01:42:23,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:42:23,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:42:23,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:42:23,961 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:42:23,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 01:42:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:42:24,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:42:24,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:42:24,183 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 01:42:24,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 01:42:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:42:24,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:42:24,217 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:42:24,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919370170] [2023-09-01 01:42:24,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919370170] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:42:24,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:42:24,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:42:24,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124873171] [2023-09-01 01:42:24,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:42:24,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:42:24,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:42:24,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:42:24,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:42:24,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 493 out of 1209 [2023-09-01 01:42:24,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 94 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 493.6666666666667) internal successors, (1481), 3 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:24,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:42:24,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 493 of 1209 [2023-09-01 01:42:24,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:42:28,801 INFO L130 PetriNetUnfolder]: 28358/39557 cut-off events. [2023-09-01 01:42:28,801 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2023-09-01 01:42:28,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79297 conditions, 39557 events. 28358/39557 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 2019. Compared 242760 event pairs, 26445 based on Foata normal form. 0/12077 useless extension candidates. Maximal degree in co-relation 79291. Up to 39425 conditions per place. [2023-09-01 01:42:29,014 INFO L137 encePairwiseOnDemand]: 1199/1209 looper letters, 87 selfloop transitions, 7 changer transitions 0/100 dead transitions. [2023-09-01 01:42:29,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 100 transitions, 396 flow [2023-09-01 01:42:29,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:42:29,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:42:29,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1576 transitions. [2023-09-01 01:42:29,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43451888613178935 [2023-09-01 01:42:29,020 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1576 transitions. [2023-09-01 01:42:29,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1576 transitions. [2023-09-01 01:42:29,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:42:29,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1576 transitions. [2023-09-01 01:42:29,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 525.3333333333334) internal successors, (1576), 3 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:29,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:29,033 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:29,034 INFO L175 Difference]: Start difference. First operand has 91 places, 94 transitions, 196 flow. Second operand 3 states and 1576 transitions. [2023-09-01 01:42:29,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 100 transitions, 396 flow [2023-09-01 01:42:29,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 100 transitions, 395 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:42:29,038 INFO L231 Difference]: Finished difference. Result has 94 places, 100 transitions, 253 flow [2023-09-01 01:42:29,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=253, PETRI_PLACES=94, PETRI_TRANSITIONS=100} [2023-09-01 01:42:29,039 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -9 predicate places. [2023-09-01 01:42:29,039 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 100 transitions, 253 flow [2023-09-01 01:42:29,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 493.6666666666667) internal successors, (1481), 3 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:29,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:42:29,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:42:29,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-09-01 01:42:29,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:42:29,252 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-09-01 01:42:29,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:42:29,253 INFO L85 PathProgramCache]: Analyzing trace with hash 2127197, now seen corresponding path program 1 times [2023-09-01 01:42:29,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:42:29,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1882327195] [2023-09-01 01:42:29,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:42:29,254 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:42:29,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:42:29,258 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:42:29,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 01:42:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:42:29,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:42:29,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:42:29,468 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 01:42:29,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 01:42:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:42:29,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:42:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:42:29,735 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:42:29,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1882327195] [2023-09-01 01:42:29,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1882327195] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:42:29,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:42:29,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 01:42:29,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355451441] [2023-09-01 01:42:29,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:42:29,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:42:29,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:42:29,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:42:29,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:42:31,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 478 out of 1209 [2023-09-01 01:42:31,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 100 transitions, 253 flow. Second operand has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:31,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:42:31,876 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 478 of 1209 [2023-09-01 01:42:31,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:42:38,011 INFO L130 PetriNetUnfolder]: 28367/39575 cut-off events. [2023-09-01 01:42:38,012 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2023-09-01 01:42:38,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79381 conditions, 39575 events. 28367/39575 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 2018. Compared 242729 event pairs, 26445 based on Foata normal form. 0/12096 useless extension candidates. Maximal degree in co-relation 79372. Up to 39420 conditions per place. [2023-09-01 01:42:38,203 INFO L137 encePairwiseOnDemand]: 1198/1209 looper letters, 86 selfloop transitions, 26 changer transitions 0/118 dead transitions. [2023-09-01 01:42:38,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 118 transitions, 561 flow [2023-09-01 01:42:38,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:42:38,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:42:38,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2989 transitions. [2023-09-01 01:42:38,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41204852495175076 [2023-09-01 01:42:38,213 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2989 transitions. [2023-09-01 01:42:38,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2989 transitions. [2023-09-01 01:42:38,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:42:38,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2989 transitions. [2023-09-01 01:42:38,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 498.1666666666667) internal successors, (2989), 6 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:38,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1209.0) internal successors, (8463), 7 states have internal predecessors, (8463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:38,235 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1209.0) internal successors, (8463), 7 states have internal predecessors, (8463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:38,235 INFO L175 Difference]: Start difference. First operand has 94 places, 100 transitions, 253 flow. Second operand 6 states and 2989 transitions. [2023-09-01 01:42:38,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 118 transitions, 561 flow [2023-09-01 01:42:38,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 118 transitions, 535 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:42:38,239 INFO L231 Difference]: Finished difference. Result has 100 places, 118 transitions, 420 flow [2023-09-01 01:42:38,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=420, PETRI_PLACES=100, PETRI_TRANSITIONS=118} [2023-09-01 01:42:38,240 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -3 predicate places. [2023-09-01 01:42:38,240 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 118 transitions, 420 flow [2023-09-01 01:42:38,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:38,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:42:38,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 01:42:38,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-09-01 01:42:38,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:42:38,451 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-09-01 01:42:38,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:42:38,451 INFO L85 PathProgramCache]: Analyzing trace with hash 2046759497, now seen corresponding path program 1 times [2023-09-01 01:42:38,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:42:38,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916684546] [2023-09-01 01:42:38,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:42:38,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:42:38,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:42:38,453 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:42:38,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 01:42:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:42:38,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 01:42:38,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:42:38,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 01:42:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:42:38,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:42:38,543 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:42:38,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916684546] [2023-09-01 01:42:38,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916684546] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:42:38,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:42:38,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:42:38,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741271690] [2023-09-01 01:42:38,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:42:38,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:42:38,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:42:38,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:42:38,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:42:38,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 496 out of 1209 [2023-09-01 01:42:38,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 118 transitions, 420 flow. Second operand has 3 states, 3 states have (on average 497.6666666666667) internal successors, (1493), 3 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:38,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:42:38,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 496 of 1209 [2023-09-01 01:42:38,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:42:42,247 INFO L130 PetriNetUnfolder]: 28367/39572 cut-off events. [2023-09-01 01:42:42,247 INFO L131 PetriNetUnfolder]: For 135/135 co-relation queries the response was YES. [2023-09-01 01:42:42,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79422 conditions, 39572 events. 28367/39572 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 2019. Compared 242802 event pairs, 26445 based on Foata normal form. 0/12100 useless extension candidates. Maximal degree in co-relation 79410. Up to 39415 conditions per place. [2023-09-01 01:42:42,466 INFO L137 encePairwiseOnDemand]: 1205/1209 looper letters, 104 selfloop transitions, 5 changer transitions 0/115 dead transitions. [2023-09-01 01:42:42,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 115 transitions, 632 flow [2023-09-01 01:42:42,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:42:42,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:42:42,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1576 transitions. [2023-09-01 01:42:42,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43451888613178935 [2023-09-01 01:42:42,472 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1576 transitions. [2023-09-01 01:42:42,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1576 transitions. [2023-09-01 01:42:42,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:42:42,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1576 transitions. [2023-09-01 01:42:42,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 525.3333333333334) internal successors, (1576), 3 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:42,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:42,485 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:42,485 INFO L175 Difference]: Start difference. First operand has 100 places, 118 transitions, 420 flow. Second operand 3 states and 1576 transitions. [2023-09-01 01:42:42,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 115 transitions, 632 flow [2023-09-01 01:42:42,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 115 transitions, 595 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-09-01 01:42:42,491 INFO L231 Difference]: Finished difference. Result has 98 places, 115 transitions, 387 flow [2023-09-01 01:42:42,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=387, PETRI_PLACES=98, PETRI_TRANSITIONS=115} [2023-09-01 01:42:42,492 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2023-09-01 01:42:42,493 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 115 transitions, 387 flow [2023-09-01 01:42:42,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 497.6666666666667) internal successors, (1493), 3 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:42,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:42:42,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 01:42:42,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 01:42:42,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:42:42,703 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-09-01 01:42:42,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:42:42,703 INFO L85 PathProgramCache]: Analyzing trace with hash 2046759495, now seen corresponding path program 1 times [2023-09-01 01:42:42,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:42:42,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734584091] [2023-09-01 01:42:42,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:42:42,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:42:42,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:42:42,705 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:42:42,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 01:42:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:42:42,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:42:42,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:42:42,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 01:42:42,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:42:42,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:42:42,852 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:42:42,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734584091] [2023-09-01 01:42:42,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734584091] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:42:42,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:42:42,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:42:42,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200241831] [2023-09-01 01:42:42,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:42:42,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:42:42,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:42:42,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:42:42,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:42:43,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 491 out of 1209 [2023-09-01 01:42:43,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 115 transitions, 387 flow. Second operand has 4 states, 4 states have (on average 492.25) internal successors, (1969), 4 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:43,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:42:43,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 491 of 1209 [2023-09-01 01:42:43,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:42:47,317 INFO L130 PetriNetUnfolder]: 28368/39574 cut-off events. [2023-09-01 01:42:47,317 INFO L131 PetriNetUnfolder]: For 143/143 co-relation queries the response was YES. [2023-09-01 01:42:47,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79413 conditions, 39574 events. 28368/39574 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 2019. Compared 242815 event pairs, 26445 based on Foata normal form. 0/12105 useless extension candidates. Maximal degree in co-relation 79401. Up to 39441 conditions per place. [2023-09-01 01:42:47,603 INFO L137 encePairwiseOnDemand]: 1204/1209 looper letters, 103 selfloop transitions, 8 changer transitions 0/117 dead transitions. [2023-09-01 01:42:47,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 117 transitions, 616 flow [2023-09-01 01:42:47,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:42:47,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:42:47,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2052 transitions. [2023-09-01 01:42:47,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42431761786600497 [2023-09-01 01:42:47,609 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2052 transitions. [2023-09-01 01:42:47,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2052 transitions. [2023-09-01 01:42:47,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:42:47,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2052 transitions. [2023-09-01 01:42:47,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:47,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1209.0) internal successors, (6045), 5 states have internal predecessors, (6045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:47,621 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1209.0) internal successors, (6045), 5 states have internal predecessors, (6045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:47,621 INFO L175 Difference]: Start difference. First operand has 98 places, 115 transitions, 387 flow. Second operand 4 states and 2052 transitions. [2023-09-01 01:42:47,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 117 transitions, 616 flow [2023-09-01 01:42:47,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 117 transitions, 611 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:42:47,625 INFO L231 Difference]: Finished difference. Result has 101 places, 117 transitions, 418 flow [2023-09-01 01:42:47,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=418, PETRI_PLACES=101, PETRI_TRANSITIONS=117} [2023-09-01 01:42:47,628 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -2 predicate places. [2023-09-01 01:42:47,628 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 117 transitions, 418 flow [2023-09-01 01:42:47,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 492.25) internal successors, (1969), 4 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:47,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:42:47,629 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 01:42:47,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 01:42:47,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:42:47,838 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-09-01 01:42:47,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:42:47,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1044340948, now seen corresponding path program 2 times [2023-09-01 01:42:47,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:42:47,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508352614] [2023-09-01 01:42:47,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:42:47,839 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:42:47,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:42:47,840 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:42:47,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 01:42:47,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:42:47,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:42:47,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:42:47,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:42:48,035 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 01:42:48,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 01:42:48,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:42:48,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:42:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:42:48,619 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:42:48,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508352614] [2023-09-01 01:42:48,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508352614] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:42:48,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:42:48,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 01:42:48,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850485797] [2023-09-01 01:42:48,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:42:48,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:42:48,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:42:48,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:42:48,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:42:57,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 481 out of 1209 [2023-09-01 01:42:57,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 117 transitions, 418 flow. Second operand has 12 states, 12 states have (on average 482.0) internal successors, (5784), 12 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:42:57,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:42:57,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 481 of 1209 [2023-09-01 01:42:57,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:42:59,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:43:01,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:43:02,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:43:04,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:43:06,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:43:08,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:43:10,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:43:11,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:43:13,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:43:15,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:43:16,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:43:23,682 INFO L130 PetriNetUnfolder]: 28388/39615 cut-off events. [2023-09-01 01:43:23,682 INFO L131 PetriNetUnfolder]: For 224/224 co-relation queries the response was YES. [2023-09-01 01:43:23,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79592 conditions, 39615 events. 28388/39615 cut-off events. For 224/224 co-relation queries the response was YES. Maximal size of possible extension queue 2021. Compared 243189 event pairs, 26445 based on Foata normal form. 18/12151 useless extension candidates. Maximal degree in co-relation 79578. Up to 39421 conditions per place. [2023-09-01 01:43:23,889 INFO L137 encePairwiseOnDemand]: 1198/1209 looper letters, 87 selfloop transitions, 65 changer transitions 0/158 dead transitions. [2023-09-01 01:43:23,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 158 transitions, 984 flow [2023-09-01 01:43:23,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 01:43:23,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 01:43:23,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 5938 transitions. [2023-09-01 01:43:23,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40929142542045766 [2023-09-01 01:43:23,903 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 5938 transitions. [2023-09-01 01:43:23,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 5938 transitions. [2023-09-01 01:43:23,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:43:23,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 5938 transitions. [2023-09-01 01:43:23,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 494.8333333333333) internal successors, (5938), 12 states have internal predecessors, (5938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:23,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 1209.0) internal successors, (15717), 13 states have internal predecessors, (15717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:23,936 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 1209.0) internal successors, (15717), 13 states have internal predecessors, (15717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:23,936 INFO L175 Difference]: Start difference. First operand has 101 places, 117 transitions, 418 flow. Second operand 12 states and 5938 transitions. [2023-09-01 01:43:23,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 158 transitions, 984 flow [2023-09-01 01:43:23,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 158 transitions, 963 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 01:43:23,941 INFO L231 Difference]: Finished difference. Result has 116 places, 155 transitions, 890 flow [2023-09-01 01:43:23,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=890, PETRI_PLACES=116, PETRI_TRANSITIONS=155} [2023-09-01 01:43:23,942 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 13 predicate places. [2023-09-01 01:43:23,942 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 155 transitions, 890 flow [2023-09-01 01:43:23,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 482.0) internal successors, (5784), 12 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:23,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:43:23,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 01:43:23,955 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 (7)] Ended with exit code 0 [2023-09-01 01:43:24,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:43:24,153 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-09-01 01:43:24,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:43:24,153 INFO L85 PathProgramCache]: Analyzing trace with hash -974956327, now seen corresponding path program 1 times [2023-09-01 01:43:24,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:43:24,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916478708] [2023-09-01 01:43:24,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:43:24,154 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:43:24,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:43:24,155 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:43:24,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 01:43:24,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:43:24,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 01:43:24,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:43:24,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 01:43:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:43:24,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:43:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:43:24,504 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:43:24,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916478708] [2023-09-01 01:43:24,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916478708] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:43:24,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:43:24,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 01:43:24,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485426854] [2023-09-01 01:43:24,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:43:24,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 01:43:24,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:43:24,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 01:43:24,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-09-01 01:43:27,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 1209 [2023-09-01 01:43:27,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 155 transitions, 890 flow. Second operand has 7 states, 7 states have (on average 477.7142857142857) internal successors, (3344), 7 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:27,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:43:27,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 1209 [2023-09-01 01:43:27,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:43:34,032 INFO L130 PetriNetUnfolder]: 28402/39639 cut-off events. [2023-09-01 01:43:34,032 INFO L131 PetriNetUnfolder]: For 261/261 co-relation queries the response was YES. [2023-09-01 01:43:34,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79801 conditions, 39639 events. 28402/39639 cut-off events. For 261/261 co-relation queries the response was YES. Maximal size of possible extension queue 2021. Compared 243611 event pairs, 26445 based on Foata normal form. 0/12159 useless extension candidates. Maximal degree in co-relation 79781. Up to 39423 conditions per place. [2023-09-01 01:43:34,353 INFO L137 encePairwiseOnDemand]: 1196/1209 looper letters, 134 selfloop transitions, 36 changer transitions 0/176 dead transitions. [2023-09-01 01:43:34,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 176 transitions, 1326 flow [2023-09-01 01:43:34,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:43:34,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:43:34,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3444 transitions. [2023-09-01 01:43:34,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40694789081885857 [2023-09-01 01:43:34,361 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3444 transitions. [2023-09-01 01:43:34,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3444 transitions. [2023-09-01 01:43:34,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:43:34,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3444 transitions. [2023-09-01 01:43:34,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 492.0) internal successors, (3444), 7 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:34,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1209.0) internal successors, (9672), 8 states have internal predecessors, (9672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:34,379 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1209.0) internal successors, (9672), 8 states have internal predecessors, (9672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:34,379 INFO L175 Difference]: Start difference. First operand has 116 places, 155 transitions, 890 flow. Second operand 7 states and 3444 transitions. [2023-09-01 01:43:34,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 176 transitions, 1326 flow [2023-09-01 01:43:34,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 176 transitions, 1175 flow, removed 40 selfloop flow, removed 4 redundant places. [2023-09-01 01:43:34,386 INFO L231 Difference]: Finished difference. Result has 121 places, 176 transitions, 975 flow [2023-09-01 01:43:34,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=975, PETRI_PLACES=121, PETRI_TRANSITIONS=176} [2023-09-01 01:43:34,387 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 18 predicate places. [2023-09-01 01:43:34,387 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 176 transitions, 975 flow [2023-09-01 01:43:34,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 477.7142857142857) internal successors, (3344), 7 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:34,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:43:34,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:43:34,398 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 [2023-09-01 01:43:34,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:43:34,598 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-09-01 01:43:34,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:43:34,599 INFO L85 PathProgramCache]: Analyzing trace with hash -158725351, now seen corresponding path program 1 times [2023-09-01 01:43:34,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:43:34,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558673316] [2023-09-01 01:43:34,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:43:34,600 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:43:34,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:43:34,601 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:43:34,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 01:43:34,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:43:34,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 01:43:34,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:43:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:43:34,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:43:34,762 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:43:34,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558673316] [2023-09-01 01:43:34,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558673316] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:43:34,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:43:34,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:43:34,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406752674] [2023-09-01 01:43:34,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:43:34,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:43:34,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:43:34,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:43:34,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:43:34,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 1209 [2023-09-01 01:43:34,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 176 transitions, 975 flow. Second operand has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:34,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:43:34,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 1209 [2023-09-01 01:43:34,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:43:38,643 INFO L130 PetriNetUnfolder]: 28401/39638 cut-off events. [2023-09-01 01:43:38,644 INFO L131 PetriNetUnfolder]: For 332/332 co-relation queries the response was YES. [2023-09-01 01:43:38,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79800 conditions, 39638 events. 28401/39638 cut-off events. For 332/332 co-relation queries the response was YES. Maximal size of possible extension queue 2021. Compared 243725 event pairs, 26445 based on Foata normal form. 1/12173 useless extension candidates. Maximal degree in co-relation 79776. Up to 39510 conditions per place. [2023-09-01 01:43:39,054 INFO L137 encePairwiseOnDemand]: 1206/1209 looper letters, 167 selfloop transitions, 2 changer transitions 0/175 dead transitions. [2023-09-01 01:43:39,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 175 transitions, 1309 flow [2023-09-01 01:43:39,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:43:39,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:43:39,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1584 transitions. [2023-09-01 01:43:39,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43672456575682383 [2023-09-01 01:43:39,058 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1584 transitions. [2023-09-01 01:43:39,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1584 transitions. [2023-09-01 01:43:39,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:43:39,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1584 transitions. [2023-09-01 01:43:39,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 528.0) internal successors, (1584), 3 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:39,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:39,071 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:39,071 INFO L175 Difference]: Start difference. First operand has 121 places, 176 transitions, 975 flow. Second operand 3 states and 1584 transitions. [2023-09-01 01:43:39,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 175 transitions, 1309 flow [2023-09-01 01:43:39,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 175 transitions, 1274 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-09-01 01:43:39,078 INFO L231 Difference]: Finished difference. Result has 121 places, 175 transitions, 940 flow [2023-09-01 01:43:39,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=940, PETRI_PLACES=121, PETRI_TRANSITIONS=175} [2023-09-01 01:43:39,080 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 18 predicate places. [2023-09-01 01:43:39,081 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 175 transitions, 940 flow [2023-09-01 01:43:39,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:39,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:43:39,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:43:39,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 01:43:39,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:43:39,294 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-09-01 01:43:39,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:43:39,294 INFO L85 PathProgramCache]: Analyzing trace with hash -732922040, now seen corresponding path program 1 times [2023-09-01 01:43:39,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:43:39,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [595165353] [2023-09-01 01:43:39,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:43:39,295 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:43:39,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:43:39,296 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:43:39,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 01:43:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:43:39,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:43:39,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:43:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:43:39,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:43:39,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:43:39,619 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:43:39,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [595165353] [2023-09-01 01:43:39,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [595165353] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:43:39,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:43:39,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 01:43:39,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611852303] [2023-09-01 01:43:39,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:43:39,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:43:39,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:43:39,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:43:39,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:43:41,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 1209 [2023-09-01 01:43:41,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 175 transitions, 940 flow. Second operand has 10 states, 10 states have (on average 474.4) internal successors, (4744), 10 states have internal predecessors, (4744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:41,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:43:41,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 1209 [2023-09-01 01:43:41,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:43:49,868 INFO L130 PetriNetUnfolder]: 56787/79249 cut-off events. [2023-09-01 01:43:49,868 INFO L131 PetriNetUnfolder]: For 643/643 co-relation queries the response was YES. [2023-09-01 01:43:50,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159398 conditions, 79249 events. 56787/79249 cut-off events. For 643/643 co-relation queries the response was YES. Maximal size of possible extension queue 3666. Compared 529288 event pairs, 52890 based on Foata normal form. 4/24321 useless extension candidates. Maximal degree in co-relation 159373. Up to 39490 conditions per place. [2023-09-01 01:43:50,459 INFO L137 encePairwiseOnDemand]: 1200/1209 looper letters, 277 selfloop transitions, 34 changer transitions 0/317 dead transitions. [2023-09-01 01:43:50,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 317 transitions, 2276 flow [2023-09-01 01:43:50,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 01:43:50,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 01:43:50,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4430 transitions. [2023-09-01 01:43:50,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4071316974542781 [2023-09-01 01:43:50,468 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4430 transitions. [2023-09-01 01:43:50,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4430 transitions. [2023-09-01 01:43:50,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:43:50,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4430 transitions. [2023-09-01 01:43:50,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 492.22222222222223) internal successors, (4430), 9 states have internal predecessors, (4430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:50,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1209.0) internal successors, (12090), 10 states have internal predecessors, (12090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:50,489 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1209.0) internal successors, (12090), 10 states have internal predecessors, (12090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:50,489 INFO L175 Difference]: Start difference. First operand has 121 places, 175 transitions, 940 flow. Second operand 9 states and 4430 transitions. [2023-09-01 01:43:50,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 317 transitions, 2276 flow [2023-09-01 01:43:50,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 317 transitions, 2272 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 01:43:50,499 INFO L231 Difference]: Finished difference. Result has 128 places, 188 transitions, 1133 flow [2023-09-01 01:43:50,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1133, PETRI_PLACES=128, PETRI_TRANSITIONS=188} [2023-09-01 01:43:50,500 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 25 predicate places. [2023-09-01 01:43:50,501 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 188 transitions, 1133 flow [2023-09-01 01:43:50,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 474.4) internal successors, (4744), 10 states have internal predecessors, (4744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:50,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:43:50,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:43:50,515 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 (10)] Ended with exit code 0 [2023-09-01 01:43:50,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:43:50,712 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-09-01 01:43:50,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:43:50,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1249966372, now seen corresponding path program 1 times [2023-09-01 01:43:50,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:43:50,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724234873] [2023-09-01 01:43:50,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:43:50,713 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:43:50,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:43:50,714 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:43:50,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 01:43:50,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:43:50,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 01:43:50,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:43:50,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:43:50,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:43:50,888 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:43:50,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724234873] [2023-09-01 01:43:50,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724234873] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:43:50,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:43:50,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:43:50,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688983940] [2023-09-01 01:43:50,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:43:50,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:43:50,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:43:50,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:43:50,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:43:51,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 497 out of 1209 [2023-09-01 01:43:51,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 188 transitions, 1133 flow. Second operand has 4 states, 4 states have (on average 499.25) internal successors, (1997), 4 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:51,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:43:51,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 497 of 1209 [2023-09-01 01:43:51,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:43:59,403 INFO L130 PetriNetUnfolder]: 56785/79247 cut-off events. [2023-09-01 01:43:59,404 INFO L131 PetriNetUnfolder]: For 750/750 co-relation queries the response was YES. [2023-09-01 01:43:59,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159428 conditions, 79247 events. 56785/79247 cut-off events. For 750/750 co-relation queries the response was YES. Maximal size of possible extension queue 3847. Compared 531651 event pairs, 52890 based on Foata normal form. 2/24317 useless extension candidates. Maximal degree in co-relation 159402. Up to 78980 conditions per place. [2023-09-01 01:43:59,937 INFO L137 encePairwiseOnDemand]: 1204/1209 looper letters, 168 selfloop transitions, 13 changer transitions 0/187 dead transitions. [2023-09-01 01:43:59,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 187 transitions, 1491 flow [2023-09-01 01:43:59,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:43:59,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:43:59,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2076 transitions. [2023-09-01 01:43:59,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292803970223325 [2023-09-01 01:43:59,942 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2076 transitions. [2023-09-01 01:43:59,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2076 transitions. [2023-09-01 01:43:59,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:43:59,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2076 transitions. [2023-09-01 01:43:59,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:59,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1209.0) internal successors, (6045), 5 states have internal predecessors, (6045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:59,950 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1209.0) internal successors, (6045), 5 states have internal predecessors, (6045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:59,950 INFO L175 Difference]: Start difference. First operand has 128 places, 188 transitions, 1133 flow. Second operand 4 states and 2076 transitions. [2023-09-01 01:43:59,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 187 transitions, 1491 flow [2023-09-01 01:43:59,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 187 transitions, 1486 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 01:43:59,958 INFO L231 Difference]: Finished difference. Result has 129 places, 187 transitions, 1150 flow [2023-09-01 01:43:59,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1150, PETRI_PLACES=129, PETRI_TRANSITIONS=187} [2023-09-01 01:43:59,959 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 26 predicate places. [2023-09-01 01:43:59,959 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 187 transitions, 1150 flow [2023-09-01 01:43:59,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 499.25) internal successors, (1997), 4 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:43:59,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:43:59,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:43:59,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 01:44:00,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:44:00,178 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-09-01 01:44:00,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:44:00,178 INFO L85 PathProgramCache]: Analyzing trace with hash -5232254, now seen corresponding path program 1 times [2023-09-01 01:44:00,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:44:00,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133893386] [2023-09-01 01:44:00,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:44:00,179 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:44:00,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:44:00,180 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:44:00,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 01:44:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:44:00,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 01:44:00,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:44:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:44:00,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:44:00,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:44:00,538 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:44:00,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133893386] [2023-09-01 01:44:00,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133893386] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:44:00,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:44:00,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2023-09-01 01:44:00,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802768779] [2023-09-01 01:44:00,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:44:00,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 01:44:00,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:44:00,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 01:44:00,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-09-01 01:44:02,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 1209 [2023-09-01 01:44:02,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 187 transitions, 1150 flow. Second operand has 11 states, 11 states have (on average 474.72727272727275) internal successors, (5222), 11 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:44:02,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:44:02,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 1209 [2023-09-01 01:44:02,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:44:20,179 INFO L130 PetriNetUnfolder]: 113535/158423 cut-off events. [2023-09-01 01:44:20,179 INFO L131 PetriNetUnfolder]: For 1383/1383 co-relation queries the response was YES. [2023-09-01 01:44:20,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318534 conditions, 158423 events. 113535/158423 cut-off events. For 1383/1383 co-relation queries the response was YES. Maximal size of possible extension queue 7137. Compared 1149811 event pairs, 105780 based on Foata normal form. 4/48563 useless extension candidates. Maximal degree in co-relation 318508. Up to 78951 conditions per place. [2023-09-01 01:44:21,337 INFO L137 encePairwiseOnDemand]: 1199/1209 looper letters, 271 selfloop transitions, 44 changer transitions 0/321 dead transitions. [2023-09-01 01:44:21,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 321 transitions, 2557 flow [2023-09-01 01:44:21,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 01:44:21,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 01:44:21,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4427 transitions. [2023-09-01 01:44:21,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068559875011488 [2023-09-01 01:44:21,343 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4427 transitions. [2023-09-01 01:44:21,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4427 transitions. [2023-09-01 01:44:21,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:44:21,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4427 transitions. [2023-09-01 01:44:21,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 491.8888888888889) internal successors, (4427), 9 states have internal predecessors, (4427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:44:21,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1209.0) internal successors, (12090), 10 states have internal predecessors, (12090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:44:21,360 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1209.0) internal successors, (12090), 10 states have internal predecessors, (12090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:44:21,361 INFO L175 Difference]: Start difference. First operand has 129 places, 187 transitions, 1150 flow. Second operand 9 states and 4427 transitions. [2023-09-01 01:44:21,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 321 transitions, 2557 flow [2023-09-01 01:44:21,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 321 transitions, 2556 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:44:21,373 INFO L231 Difference]: Finished difference. Result has 136 places, 201 transitions, 1381 flow [2023-09-01 01:44:21,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1381, PETRI_PLACES=136, PETRI_TRANSITIONS=201} [2023-09-01 01:44:21,374 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 33 predicate places. [2023-09-01 01:44:21,374 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 201 transitions, 1381 flow [2023-09-01 01:44:21,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 474.72727272727275) internal successors, (5222), 11 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:44:21,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:44:21,376 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:44:21,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 01:44:21,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:44:21,589 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-09-01 01:44:21,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:44:21,590 INFO L85 PathProgramCache]: Analyzing trace with hash -162261576, now seen corresponding path program 1 times [2023-09-01 01:44:21,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:44:21,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915055263] [2023-09-01 01:44:21,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:44:21,590 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:44:21,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:44:21,591 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:44:21,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 01:44:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:44:21,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:44:21,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:44:21,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 01:44:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 01:44:21,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:44:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 01:44:22,148 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:44:22,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915055263] [2023-09-01 01:44:22,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915055263] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:44:22,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:44:22,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2023-09-01 01:44:22,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797790136] [2023-09-01 01:44:22,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:44:22,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 01:44:22,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:44:22,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 01:44:22,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-09-01 01:44:27,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 479 out of 1209 [2023-09-01 01:44:27,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 201 transitions, 1381 flow. Second operand has 9 states, 9 states have (on average 481.22222222222223) internal successors, (4331), 9 states have internal predecessors, (4331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:44:27,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:44:27,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 479 of 1209 [2023-09-01 01:44:27,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:44:28,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:44:30,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:44:33,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []