./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-horseshoe.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 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:06:58,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:06:58,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:06:58,454 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:06:58,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:06:58,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:06:58,460 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:06:58,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:06:58,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:06:58,469 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:06:58,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:06:58,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:06:58,473 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:06:58,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:06:58,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:06:58,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:06:58,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:06:58,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:06:58,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:06:58,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:06:58,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:06:58,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:06:58,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:06:58,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:06:58,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:06:58,523 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:06:58,524 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:06:58,524 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:06:58,525 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:06:58,526 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:06:58,526 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:06:58,526 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:06:58,527 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:06:58,528 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:06:58,533 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:06:58,533 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:06:58,534 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:06:58,534 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:06:58,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:06:58,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:06:58,535 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:06:58,541 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:06:58,592 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:06:58,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:06:58,593 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:06:58,593 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:06:58,594 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:06:58,594 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:06:58,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:06:58,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:06:58,595 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:06:58,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:06:58,596 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:06:58,597 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:06:58,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:06:58,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:06:58,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:06:58,597 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:06:58,597 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:06:58,598 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:06:58,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:06:58,598 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:06:58,598 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:06:58,598 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:06:58,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:06:58,599 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:06:58,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:06:58,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:06:58,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:06:58,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:06:58,600 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:06:58,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:06:58,600 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:06:58,600 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:06:58,601 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:06:58,601 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:06:58,601 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:06:59,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:06:59,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:06:59,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:06:59,085 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:06:59,086 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:06:59,087 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2023-08-30 00:07:00,672 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:07:00,908 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:07:00,909 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2023-08-30 00:07:00,915 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e58d4a630/7f85b70730de4e5195dfbd0ba2552929/FLAG48ceba3b3 [2023-08-30 00:07:00,937 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e58d4a630/7f85b70730de4e5195dfbd0ba2552929 [2023-08-30 00:07:00,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:07:00,942 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:07:00,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:07:00,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:07:00,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:07:00,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:07:00" (1/1) ... [2023-08-30 00:07:00,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b3d28d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:07:00, skipping insertion in model container [2023-08-30 00:07:00,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:07:00" (1/1) ... [2023-08-30 00:07:00,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:07:01,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:07:01,249 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c[3424,3437] [2023-08-30 00:07:01,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:07:01,293 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 00:07:01,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@62d90384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:07:01, skipping insertion in model container [2023-08-30 00:07:01,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:07:01,311 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 00:07:01,313 INFO L158 Benchmark]: Toolchain (without parser) took 370.27ms. Allocated memory is still 81.8MB. Free memory was 60.1MB in the beginning and 50.0MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 00:07:01,313 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 62.9MB. Free memory is still 40.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:07:01,314 INFO L158 Benchmark]: CACSL2BoogieTranslator took 366.71ms. Allocated memory is still 81.8MB. Free memory was 59.9MB in the beginning and 50.0MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 00:07:01,315 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 62.9MB. Free memory is still 40.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 366.71ms. Allocated memory is still 81.8MB. Free memory was 59.9MB in the beginning and 50.0MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 136]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-horseshoe.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 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:07:03,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:07:03,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:07:03,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:07:03,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:07:03,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:07:03,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:07:03,779 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:07:03,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:07:03,782 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:07:03,783 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:07:03,784 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:07:03,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:07:03,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:07:03,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:07:03,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:07:03,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:07:03,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:07:03,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:07:03,804 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:07:03,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:07:03,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:07:03,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:07:03,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:07:03,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:07:03,813 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:07:03,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:07:03,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:07:03,815 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:07:03,816 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:07:03,816 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:07:03,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:07:03,817 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:07:03,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:07:03,819 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:07:03,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:07:03,820 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:07:03,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:07:03,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:07:03,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:07:03,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:07:03,823 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 00:07:03,849 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:07:03,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:07:03,850 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:07:03,850 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:07:03,851 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:07:03,851 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:07:03,852 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:07:03,852 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:07:03,852 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:07:03,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:07:03,853 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:07:03,853 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:07:03,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:07:03,853 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:07:03,853 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:07:03,854 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:07:03,854 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:07:03,854 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:07:03,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:07:03,855 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:07:03,855 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 00:07:03,855 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 00:07:03,855 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:07:03,855 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:07:03,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:07:03,856 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:07:03,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:07:03,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:07:03,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:07:03,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:07:03,857 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 00:07:03,857 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 00:07:03,858 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:07:03,858 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:07:03,858 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:07:03,858 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 00:07:03,859 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:07:03,859 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:07:04,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:07:04,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:07:04,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:07:04,143 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:07:04,143 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:07:04,145 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2023-08-30 00:07:05,609 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:07:05,901 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:07:05,902 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2023-08-30 00:07:05,911 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2ffe80b6/8bd25dbc8c6a4ee39471e60001c10d52/FLAGb5b810674 [2023-08-30 00:07:05,949 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2ffe80b6/8bd25dbc8c6a4ee39471e60001c10d52 [2023-08-30 00:07:05,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:07:05,953 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:07:05,956 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:07:05,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:07:05,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:07:05,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:07:05" (1/1) ... [2023-08-30 00:07:05,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@407fedb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:07:05, skipping insertion in model container [2023-08-30 00:07:05,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:07:05" (1/1) ... [2023-08-30 00:07:05,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:07:06,010 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:07:06,261 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c[3424,3437] [2023-08-30 00:07:06,285 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:07:06,297 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 00:07:06,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:07:06,316 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c[3424,3437] [2023-08-30 00:07:06,319 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:07:06,325 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:07:06,356 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c[3424,3437] [2023-08-30 00:07:06,359 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:07:06,368 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:07:06,368 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:07:06,389 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:07:06,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:07:06 WrapperNode [2023-08-30 00:07:06,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:07:06,391 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:07:06,391 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:07:06,391 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:07:06,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:07:06" (1/1) ... [2023-08-30 00:07:06,409 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:07:06" (1/1) ... [2023-08-30 00:07:06,439 INFO L138 Inliner]: procedures = 27, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 245 [2023-08-30 00:07:06,440 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:07:06,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:07:06,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:07:06,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:07:06,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:07:06" (1/1) ... [2023-08-30 00:07:06,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:07:06" (1/1) ... [2023-08-30 00:07:06,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:07:06" (1/1) ... [2023-08-30 00:07:06,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:07:06" (1/1) ... [2023-08-30 00:07:06,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:07:06" (1/1) ... [2023-08-30 00:07:06,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:07:06" (1/1) ... [2023-08-30 00:07:06,493 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:07:06" (1/1) ... [2023-08-30 00:07:06,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:07:06" (1/1) ... [2023-08-30 00:07:06,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:07:06,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:07:06,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:07:06,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:07:06,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:07:06" (1/1) ... [2023-08-30 00:07:06,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:07:06,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:07:06,550 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 00:07:06,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 00:07:06,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:07:06,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 00:07:06,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:07:06,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 00:07:06,596 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:07:06,596 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:07:06,597 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:07:06,597 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:07:06,597 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 00:07:06,597 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 00:07:06,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:07:06,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:07:06,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 00:07:06,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:07:06,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:07:06,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:07:06,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 00:07:06,599 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 00:07:06,748 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:07:06,766 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:07:07,734 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:07:07,945 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:07:07,953 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-30 00:07:07,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:07:07 BoogieIcfgContainer [2023-08-30 00:07:07,958 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:07:07,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:07:07,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:07:07,964 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:07:07,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:07:05" (1/3) ... [2023-08-30 00:07:07,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e7b4630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:07:07, skipping insertion in model container [2023-08-30 00:07:07,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:07:06" (2/3) ... [2023-08-30 00:07:07,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e7b4630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:07:07, skipping insertion in model container [2023-08-30 00:07:07,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:07:07" (3/3) ... [2023-08-30 00:07:07,981 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2023-08-30 00:07:08,001 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:07:08,002 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-08-30 00:07:08,002 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:07:08,112 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 00:07:08,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 216 places, 224 transitions, 472 flow [2023-08-30 00:07:08,237 INFO L130 PetriNetUnfolder]: 18/221 cut-off events. [2023-08-30 00:07:08,238 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:07:08,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 221 events. 18/221 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 235 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 174. Up to 3 conditions per place. [2023-08-30 00:07:08,259 INFO L82 GeneralOperation]: Start removeDead. Operand has 216 places, 224 transitions, 472 flow [2023-08-30 00:07:08,264 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 217 transitions, 452 flow [2023-08-30 00:07:08,282 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:07:08,314 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 217 transitions, 452 flow [2023-08-30 00:07:08,318 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 217 transitions, 452 flow [2023-08-30 00:07:08,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 217 transitions, 452 flow [2023-08-30 00:07:08,435 INFO L130 PetriNetUnfolder]: 18/217 cut-off events. [2023-08-30 00:07:08,435 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:07:08,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 217 events. 18/217 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 232 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 174. Up to 3 conditions per place. [2023-08-30 00:07:08,438 INFO L119 LiptonReduction]: Number of co-enabled transitions 2700 [2023-08-30 00:07:37,128 INFO L134 LiptonReduction]: Checked pairs total: 4465 [2023-08-30 00:07:37,128 INFO L136 LiptonReduction]: Total number of compositions: 232 [2023-08-30 00:07:37,141 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:07:37,146 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;@1d80a84, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:07:37,146 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2023-08-30 00:07:37,149 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 00:07:37,149 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:07:37,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:07:37,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:07:37,150 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:07:37,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:07:37,153 INFO L85 PathProgramCache]: Analyzing trace with hash 32721, now seen corresponding path program 1 times [2023-08-30 00:07:37,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:07:37,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760397569] [2023-08-30 00:07:37,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:07:37,164 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:07:37,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:07:37,169 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:07:37,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 00:07:37,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:07:37,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:07:37,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:07:37,477 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:07:37,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:07:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:07:37,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:07:37,527 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:07:37,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760397569] [2023-08-30 00:07:37,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760397569] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:07:37,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:07:37,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:07:37,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627344802] [2023-08-30 00:07:37,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:07:37,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:07:37,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:07:37,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:07:37,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:07:37,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 456 [2023-08-30 00:07:37,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:37,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:07:37,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 456 [2023-08-30 00:07:37,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:07:38,943 INFO L130 PetriNetUnfolder]: 5982/7543 cut-off events. [2023-08-30 00:07:38,944 INFO L131 PetriNetUnfolder]: For 93/93 co-relation queries the response was YES. [2023-08-30 00:07:38,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15216 conditions, 7543 events. 5982/7543 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 33635 event pairs, 3015 based on Foata normal form. 0/1755 useless extension candidates. Maximal degree in co-relation 13723. Up to 7494 conditions per place. [2023-08-30 00:07:39,010 INFO L137 encePairwiseOnDemand]: 451/456 looper letters, 47 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-30 00:07:39,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 51 transitions, 216 flow [2023-08-30 00:07:39,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:07:39,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:07:39,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 586 transitions. [2023-08-30 00:07:39,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4283625730994152 [2023-08-30 00:07:39,029 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 586 transitions. [2023-08-30 00:07:39,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 586 transitions. [2023-08-30 00:07:39,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:07:39,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 586 transitions. [2023-08-30 00:07:39,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:39,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:39,051 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:39,053 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 128 flow. Second operand 3 states and 586 transitions. [2023-08-30 00:07:39,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 51 transitions, 216 flow [2023-08-30 00:07:39,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 00:07:39,064 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 110 flow [2023-08-30 00:07:39,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2023-08-30 00:07:39,073 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -7 predicate places. [2023-08-30 00:07:39,074 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 110 flow [2023-08-30 00:07:39,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:39,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:07:39,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:07:39,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 00:07:39,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:07:39,284 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:07:39,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:07:39,284 INFO L85 PathProgramCache]: Analyzing trace with hash 32722, now seen corresponding path program 1 times [2023-08-30 00:07:39,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:07:39,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1402860853] [2023-08-30 00:07:39,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:07:39,286 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:07:39,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:07:39,287 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:07:39,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 00:07:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:07:39,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:07:39,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:07:39,460 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:07:39,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:07:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:07:39,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:07:39,485 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:07:39,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1402860853] [2023-08-30 00:07:39,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1402860853] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:07:39,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:07:39,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:07:39,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637317939] [2023-08-30 00:07:39,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:07:39,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:07:39,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:07:39,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:07:39,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:07:39,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 456 [2023-08-30 00:07:39,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:39,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:07:39,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 456 [2023-08-30 00:07:39,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:07:41,648 INFO L130 PetriNetUnfolder]: 11950/15070 cut-off events. [2023-08-30 00:07:41,649 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-08-30 00:07:41,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30173 conditions, 15070 events. 11950/15070 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 1311. Compared 73025 event pairs, 6027 based on Foata normal form. 0/3654 useless extension candidates. Maximal degree in co-relation 30167. Up to 7491 conditions per place. [2023-08-30 00:07:41,734 INFO L137 encePairwiseOnDemand]: 450/456 looper letters, 89 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2023-08-30 00:07:41,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 96 transitions, 392 flow [2023-08-30 00:07:41,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:07:41,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:07:41,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 629 transitions. [2023-08-30 00:07:41,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4597953216374269 [2023-08-30 00:07:41,738 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 629 transitions. [2023-08-30 00:07:41,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 629 transitions. [2023-08-30 00:07:41,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:07:41,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 629 transitions. [2023-08-30 00:07:41,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:41,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:41,743 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:41,743 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 110 flow. Second operand 3 states and 629 transitions. [2023-08-30 00:07:41,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 96 transitions, 392 flow [2023-08-30 00:07:41,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 96 transitions, 391 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:07:41,747 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 141 flow [2023-08-30 00:07:41,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2023-08-30 00:07:41,748 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -4 predicate places. [2023-08-30 00:07:41,748 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 141 flow [2023-08-30 00:07:41,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:41,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:07:41,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:07:41,758 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 [2023-08-30 00:07:41,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:07:41,959 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:07:41,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:07:41,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1017668, now seen corresponding path program 1 times [2023-08-30 00:07:41,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:07:41,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641895170] [2023-08-30 00:07:41,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:07:41,960 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:07:41,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:07:41,962 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:07:41,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 00:07:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:07:42,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 00:07:42,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:07:42,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:07:42,120 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-30 00:07:42,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-30 00:07:42,193 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 00:07:42,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 00:07:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:07:42,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:07:42,208 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:07:42,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641895170] [2023-08-30 00:07:42,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641895170] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:07:42,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:07:42,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:07:42,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047345816] [2023-08-30 00:07:42,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:07:42,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:07:42,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:07:42,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:07:42,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:07:42,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 456 [2023-08-30 00:07:42,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 141 flow. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:42,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:07:42,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 456 [2023-08-30 00:07:42,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:07:43,892 INFO L130 PetriNetUnfolder]: 9351/11909 cut-off events. [2023-08-30 00:07:43,893 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2023-08-30 00:07:43,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23866 conditions, 11909 events. 9351/11909 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 964. Compared 57841 event pairs, 4696 based on Foata normal form. 0/3003 useless extension candidates. Maximal degree in co-relation 23857. Up to 11811 conditions per place. [2023-08-30 00:07:43,958 INFO L137 encePairwiseOnDemand]: 453/456 looper letters, 48 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-08-30 00:07:43,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 52 transitions, 235 flow [2023-08-30 00:07:43,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:07:43,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:07:43,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 591 transitions. [2023-08-30 00:07:43,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43201754385964913 [2023-08-30 00:07:43,962 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 591 transitions. [2023-08-30 00:07:43,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 591 transitions. [2023-08-30 00:07:43,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:07:43,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 591 transitions. [2023-08-30 00:07:43,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:43,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:43,967 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:43,967 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 141 flow. Second operand 3 states and 591 transitions. [2023-08-30 00:07:43,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 52 transitions, 235 flow [2023-08-30 00:07:43,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 227 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:07:43,969 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 131 flow [2023-08-30 00:07:43,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2023-08-30 00:07:43,970 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -6 predicate places. [2023-08-30 00:07:43,970 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 131 flow [2023-08-30 00:07:43,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:43,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:07:43,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:07:43,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 00:07:44,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:07:44,180 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:07:44,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:07:44,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1016569, now seen corresponding path program 1 times [2023-08-30 00:07:44,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:07:44,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [423759528] [2023-08-30 00:07:44,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:07:44,183 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:07:44,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:07:44,184 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:07:44,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 00:07:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:07:44,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:07:44,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:07:44,359 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:07:44,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:07:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:07:44,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:07:44,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:07:44,608 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:07:44,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [423759528] [2023-08-30 00:07:44,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [423759528] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:07:44,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:07:44,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:07:44,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25698539] [2023-08-30 00:07:44,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:07:44,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:07:44,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:07:44,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:07:44,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:07:45,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 456 [2023-08-30 00:07:45,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 131 flow. Second operand has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:45,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:07:45,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 456 [2023-08-30 00:07:45,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:07:47,772 INFO L130 PetriNetUnfolder]: 14006/17846 cut-off events. [2023-08-30 00:07:47,773 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2023-08-30 00:07:47,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35759 conditions, 17846 events. 14006/17846 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 1413. Compared 90877 event pairs, 7038 based on Foata normal form. 0/4713 useless extension candidates. Maximal degree in co-relation 35750. Up to 5907 conditions per place. [2023-08-30 00:07:47,853 INFO L137 encePairwiseOnDemand]: 448/456 looper letters, 125 selfloop transitions, 17 changer transitions 0/145 dead transitions. [2023-08-30 00:07:47,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 145 transitions, 631 flow [2023-08-30 00:07:47,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:07:47,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:07:47,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1156 transitions. [2023-08-30 00:07:47,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42251461988304095 [2023-08-30 00:07:47,857 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1156 transitions. [2023-08-30 00:07:47,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1156 transitions. [2023-08-30 00:07:47,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:07:47,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1156 transitions. [2023-08-30 00:07:47,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.66666666666666) internal successors, (1156), 6 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:47,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 456.0) internal successors, (3192), 7 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:47,866 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 456.0) internal successors, (3192), 7 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:47,866 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 131 flow. Second operand 6 states and 1156 transitions. [2023-08-30 00:07:47,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 145 transitions, 631 flow [2023-08-30 00:07:47,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 145 transitions, 630 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:07:47,869 INFO L231 Difference]: Finished difference. Result has 61 places, 65 transitions, 259 flow [2023-08-30 00:07:47,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=259, PETRI_PLACES=61, PETRI_TRANSITIONS=65} [2023-08-30 00:07:47,871 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-08-30 00:07:47,871 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 65 transitions, 259 flow [2023-08-30 00:07:47,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:47,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:07:47,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:07:47,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 00:07:48,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:07:48,080 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:07:48,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:07:48,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1017667, now seen corresponding path program 1 times [2023-08-30 00:07:48,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:07:48,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787604667] [2023-08-30 00:07:48,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:07:48,081 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:07:48,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:07:48,082 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:07:48,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 00:07:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:07:48,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:07:48,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:07:48,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:07:48,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:07:48,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:07:48,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:07:48,242 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 00:07:48,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 00:07:48,268 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 00:07:48,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 00:07:48,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:07:48,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:07:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:07:48,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:07:48,345 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:07:48,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787604667] [2023-08-30 00:07:48,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787604667] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:07:48,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:07:48,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:07:48,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800881828] [2023-08-30 00:07:48,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:07:48,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:07:48,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:07:48,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:07:48,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:07:48,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 456 [2023-08-30 00:07:48,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 65 transitions, 259 flow. Second operand has 4 states, 4 states have (on average 182.75) internal successors, (731), 4 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:48,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:07:48,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 456 [2023-08-30 00:07:48,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:07:49,728 INFO L130 PetriNetUnfolder]: 10112/13109 cut-off events. [2023-08-30 00:07:49,729 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-08-30 00:07:49,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26332 conditions, 13109 events. 10112/13109 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 921. Compared 67333 event pairs, 5043 based on Foata normal form. 0/3748 useless extension candidates. Maximal degree in co-relation 26318. Up to 12962 conditions per place. [2023-08-30 00:07:49,797 INFO L137 encePairwiseOnDemand]: 453/456 looper letters, 57 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2023-08-30 00:07:49,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 61 transitions, 355 flow [2023-08-30 00:07:49,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:07:49,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:07:49,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 592 transitions. [2023-08-30 00:07:49,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4327485380116959 [2023-08-30 00:07:49,801 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 592 transitions. [2023-08-30 00:07:49,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 592 transitions. [2023-08-30 00:07:49,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:07:49,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 592 transitions. [2023-08-30 00:07:49,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:49,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:49,806 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:49,806 INFO L175 Difference]: Start difference. First operand has 61 places, 65 transitions, 259 flow. Second operand 3 states and 592 transitions. [2023-08-30 00:07:49,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 61 transitions, 355 flow [2023-08-30 00:07:49,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 61 transitions, 336 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 00:07:49,808 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 222 flow [2023-08-30 00:07:49,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2023-08-30 00:07:49,809 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2023-08-30 00:07:49,810 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 222 flow [2023-08-30 00:07:49,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 182.75) internal successors, (731), 4 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:49,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:07:49,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:07:49,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 00:07:50,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:07:50,020 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:07:50,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:07:50,021 INFO L85 PathProgramCache]: Analyzing trace with hash 978004356, now seen corresponding path program 1 times [2023-08-30 00:07:50,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:07:50,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [817118572] [2023-08-30 00:07:50,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:07:50,022 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:07:50,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:07:50,024 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:07:50,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 00:07:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:07:50,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:07:50,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:07:50,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:07:50,189 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-30 00:07:50,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-30 00:07:50,338 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 00:07:50,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 00:07:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:07:50,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:07:50,377 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:07:50,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [817118572] [2023-08-30 00:07:50,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [817118572] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:07:50,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:07:50,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:07:50,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928350898] [2023-08-30 00:07:50,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:07:50,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:07:50,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:07:50,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:07:50,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:07:50,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 456 [2023-08-30 00:07:50,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:50,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:07:50,521 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 456 [2023-08-30 00:07:50,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:07:51,733 INFO L130 PetriNetUnfolder]: 9707/12563 cut-off events. [2023-08-30 00:07:51,733 INFO L131 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2023-08-30 00:07:51,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25231 conditions, 12563 events. 9707/12563 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 894. Compared 64238 event pairs, 4827 based on Foata normal form. 0/3652 useless extension candidates. Maximal degree in co-relation 25216. Up to 12416 conditions per place. [2023-08-30 00:07:51,849 INFO L137 encePairwiseOnDemand]: 453/456 looper letters, 55 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-08-30 00:07:51,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 330 flow [2023-08-30 00:07:51,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:07:51,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:07:51,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 587 transitions. [2023-08-30 00:07:51,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42909356725146197 [2023-08-30 00:07:51,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 587 transitions. [2023-08-30 00:07:51,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 587 transitions. [2023-08-30 00:07:51,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:07:51,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 587 transitions. [2023-08-30 00:07:51,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:51,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:51,857 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:51,857 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 222 flow. Second operand 3 states and 587 transitions. [2023-08-30 00:07:51,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 330 flow [2023-08-30 00:07:51,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 59 transitions, 329 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:07:51,860 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 219 flow [2023-08-30 00:07:51,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2023-08-30 00:07:51,863 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 0 predicate places. [2023-08-30 00:07:51,863 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 219 flow [2023-08-30 00:07:51,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:51,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:07:51,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:07:51,880 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 [2023-08-30 00:07:52,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:07:52,074 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:07:52,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:07:52,074 INFO L85 PathProgramCache]: Analyzing trace with hash 978004355, now seen corresponding path program 1 times [2023-08-30 00:07:52,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:07:52,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985293985] [2023-08-30 00:07:52,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:07:52,074 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:07:52,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:07:52,075 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:07:52,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 00:07:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:07:52,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:07:52,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:07:52,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:07:52,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:07:52,243 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-08-30 00:07:52,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2023-08-30 00:07:52,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-08-30 00:07:52,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:07:52,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:07:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:07:52,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:07:52,362 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:07:52,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985293985] [2023-08-30 00:07:52,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985293985] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:07:52,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:07:52,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:07:52,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134514134] [2023-08-30 00:07:52,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:07:52,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:07:52,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:07:52,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:07:52,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:07:52,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 456 [2023-08-30 00:07:52,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 219 flow. Second operand has 4 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:52,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:07:52,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 456 [2023-08-30 00:07:52,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:07:53,682 INFO L130 PetriNetUnfolder]: 9302/12017 cut-off events. [2023-08-30 00:07:53,683 INFO L131 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2023-08-30 00:07:53,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24140 conditions, 12017 events. 9302/12017 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 60932 event pairs, 4611 based on Foata normal form. 0/3556 useless extension candidates. Maximal degree in co-relation 24124. Up to 11870 conditions per place. [2023-08-30 00:07:53,736 INFO L137 encePairwiseOnDemand]: 453/456 looper letters, 53 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-08-30 00:07:53,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 57 transitions, 323 flow [2023-08-30 00:07:53,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:07:53,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:07:53,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 588 transitions. [2023-08-30 00:07:53,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298245614035088 [2023-08-30 00:07:53,739 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 588 transitions. [2023-08-30 00:07:53,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 588 transitions. [2023-08-30 00:07:53,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:07:53,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 588 transitions. [2023-08-30 00:07:53,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:53,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:53,743 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:53,744 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 219 flow. Second operand 3 states and 588 transitions. [2023-08-30 00:07:53,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 57 transitions, 323 flow [2023-08-30 00:07:53,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 57 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:07:53,746 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 216 flow [2023-08-30 00:07:53,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2023-08-30 00:07:53,746 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -1 predicate places. [2023-08-30 00:07:53,747 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 216 flow [2023-08-30 00:07:53,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:53,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:07:53,747 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:07:53,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-08-30 00:07:53,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:07:53,974 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:07:53,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:07:53,974 INFO L85 PathProgramCache]: Analyzing trace with hash 222007698, now seen corresponding path program 2 times [2023-08-30 00:07:53,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:07:53,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747521130] [2023-08-30 00:07:53,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:07:53,975 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:07:53,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:07:53,976 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:07:53,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 00:07:54,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:07:54,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:07:54,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 00:07:54,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:07:54,199 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:07:54,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:07:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:07:54,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:07:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:07:54,954 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:07:54,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747521130] [2023-08-30 00:07:54,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747521130] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:07:54,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:07:54,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:07:54,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149215413] [2023-08-30 00:07:54,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:07:54,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:07:54,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:07:54,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:07:54,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:07:59,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 456 [2023-08-30 00:07:59,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 216 flow. Second operand has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 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) [2023-08-30 00:07:59,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:07:59,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 456 [2023-08-30 00:07:59,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:08:02,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:08:04,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:08:07,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:08:15,850 INFO L130 PetriNetUnfolder]: 27791/35924 cut-off events. [2023-08-30 00:08:15,850 INFO L131 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2023-08-30 00:08:15,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72085 conditions, 35924 events. 27791/35924 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 1873. Compared 200692 event pairs, 13809 based on Foata normal form. 10/11123 useless extension candidates. Maximal degree in co-relation 72068. Up to 3962 conditions per place. [2023-08-30 00:08:16,019 INFO L137 encePairwiseOnDemand]: 449/456 looper letters, 311 selfloop transitions, 32 changer transitions 0/346 dead transitions. [2023-08-30 00:08:16,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 346 transitions, 1632 flow [2023-08-30 00:08:16,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 00:08:16,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 00:08:16,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2733 transitions. [2023-08-30 00:08:16,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281015037593985 [2023-08-30 00:08:16,029 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2733 transitions. [2023-08-30 00:08:16,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2733 transitions. [2023-08-30 00:08:16,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:08:16,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2733 transitions. [2023-08-30 00:08:16,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 195.21428571428572) internal successors, (2733), 14 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:08:16,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 456.0) internal successors, (6840), 15 states have internal predecessors, (6840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:08:16,046 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 456.0) internal successors, (6840), 15 states have internal predecessors, (6840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:08:16,046 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 216 flow. Second operand 14 states and 2733 transitions. [2023-08-30 00:08:16,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 346 transitions, 1632 flow [2023-08-30 00:08:16,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 346 transitions, 1631 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:08:16,051 INFO L231 Difference]: Finished difference. Result has 79 places, 76 transitions, 457 flow [2023-08-30 00:08:16,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=457, PETRI_PLACES=79, PETRI_TRANSITIONS=76} [2023-08-30 00:08:16,052 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 20 predicate places. [2023-08-30 00:08:16,052 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 76 transitions, 457 flow [2023-08-30 00:08:16,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 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) [2023-08-30 00:08:16,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:08:16,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:08:16,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 00:08:16,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:08:16,263 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:08:16,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:08:16,263 INFO L85 PathProgramCache]: Analyzing trace with hash 253357572, now seen corresponding path program 1 times [2023-08-30 00:08:16,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:08:16,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793995529] [2023-08-30 00:08:16,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:08:16,264 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:08:16,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:08:16,265 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:08:16,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 00:08:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:08:16,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:08:16,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:08:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:08:16,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:08:16,399 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:08:16,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793995529] [2023-08-30 00:08:16,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793995529] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:08:16,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:08:16,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:08:16,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575673586] [2023-08-30 00:08:16,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:08:16,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:08:16,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:08:16,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:08:16,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:08:16,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 456 [2023-08-30 00:08:16,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 76 transitions, 457 flow. Second operand has 4 states, 4 states have (on average 180.25) internal successors, (721), 4 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:08:16,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:08:16,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 456 [2023-08-30 00:08:16,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:08:19,425 INFO L130 PetriNetUnfolder]: 27851/36167 cut-off events. [2023-08-30 00:08:19,425 INFO L131 PetriNetUnfolder]: For 195/195 co-relation queries the response was YES. [2023-08-30 00:08:19,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72738 conditions, 36167 events. 27851/36167 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 1756. Compared 202582 event pairs, 13833 based on Foata normal form. 216/11542 useless extension candidates. Maximal degree in co-relation 72711. Up to 35460 conditions per place. [2023-08-30 00:08:19,581 INFO L137 encePairwiseOnDemand]: 442/456 looper letters, 97 selfloop transitions, 3 changer transitions 1/104 dead transitions. [2023-08-30 00:08:19,581 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 104 transitions, 837 flow [2023-08-30 00:08:19,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:08:19,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:08:19,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 784 transitions. [2023-08-30 00:08:19,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298245614035088 [2023-08-30 00:08:19,584 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 784 transitions. [2023-08-30 00:08:19,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 784 transitions. [2023-08-30 00:08:19,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:08:19,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 784 transitions. [2023-08-30 00:08:19,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:08:19,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 456.0) internal successors, (2280), 5 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:08:19,589 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 456.0) internal successors, (2280), 5 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:08:19,589 INFO L175 Difference]: Start difference. First operand has 79 places, 76 transitions, 457 flow. Second operand 4 states and 784 transitions. [2023-08-30 00:08:19,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 104 transitions, 837 flow [2023-08-30 00:08:19,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 104 transitions, 748 flow, removed 23 selfloop flow, removed 4 redundant places. [2023-08-30 00:08:19,593 INFO L231 Difference]: Finished difference. Result has 79 places, 76 transitions, 420 flow [2023-08-30 00:08:19,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=420, PETRI_PLACES=79, PETRI_TRANSITIONS=76} [2023-08-30 00:08:19,594 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 20 predicate places. [2023-08-30 00:08:19,594 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 76 transitions, 420 flow [2023-08-30 00:08:19,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 180.25) internal successors, (721), 4 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:08:19,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:08:19,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:08:19,602 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 [2023-08-30 00:08:19,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:08:19,798 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:08:19,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:08:19,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1676343893, now seen corresponding path program 1 times [2023-08-30 00:08:19,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:08:19,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [293734129] [2023-08-30 00:08:19,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:08:19,798 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:08:19,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:08:19,799 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:08:19,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 00:08:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:08:19,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 00:08:19,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:08:20,017 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:08:20,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:08:20,111 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:08:20,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:08:20,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:08:20,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 00:08:20,232 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 00:08:20,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 00:08:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:08:20,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:08:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:08:21,070 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:08:21,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [293734129] [2023-08-30 00:08:21,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [293734129] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:08:21,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:08:21,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:08:21,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431201158] [2023-08-30 00:08:21,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:08:21,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:08:21,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:08:21,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:08:21,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:08:23,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:08:25,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:08:29,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:08:33,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:08:38,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:08:45,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:08:46,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 456 [2023-08-30 00:08:46,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 76 transitions, 420 flow. Second operand has 8 states, 8 states have (on average 160.5) internal successors, (1284), 8 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:08:46,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:08:46,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 456 [2023-08-30 00:08:46,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:08:54,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:09:09,683 WARN L222 SmtUtils]: Spent 8.63s on a formula simplification. DAG size of input: 53 DAG size of output: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:09:21,446 INFO L130 PetriNetUnfolder]: 62377/81391 cut-off events. [2023-08-30 00:09:21,446 INFO L131 PetriNetUnfolder]: For 8956/8956 co-relation queries the response was YES. [2023-08-30 00:09:21,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208304 conditions, 81391 events. 62377/81391 cut-off events. For 8956/8956 co-relation queries the response was YES. Maximal size of possible extension queue 3616. Compared 504204 event pairs, 31167 based on Foata normal form. 0/27596 useless extension candidates. Maximal degree in co-relation 208275. Up to 44857 conditions per place. [2023-08-30 00:09:21,909 INFO L137 encePairwiseOnDemand]: 446/456 looper letters, 178 selfloop transitions, 34 changer transitions 1/216 dead transitions. [2023-08-30 00:09:21,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 216 transitions, 1411 flow [2023-08-30 00:09:21,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 00:09:21,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 00:09:21,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2558 transitions. [2023-08-30 00:09:21,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3739766081871345 [2023-08-30 00:09:21,917 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2558 transitions. [2023-08-30 00:09:21,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2558 transitions. [2023-08-30 00:09:21,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:09:21,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2558 transitions. [2023-08-30 00:09:21,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 170.53333333333333) internal successors, (2558), 15 states have internal predecessors, (2558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:21,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 456.0) internal successors, (7296), 16 states have internal predecessors, (7296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:21,931 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 456.0) internal successors, (7296), 16 states have internal predecessors, (7296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:21,932 INFO L175 Difference]: Start difference. First operand has 79 places, 76 transitions, 420 flow. Second operand 15 states and 2558 transitions. [2023-08-30 00:09:21,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 216 transitions, 1411 flow [2023-08-30 00:09:21,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 216 transitions, 1405 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 00:09:21,940 INFO L231 Difference]: Finished difference. Result has 98 places, 96 transitions, 696 flow [2023-08-30 00:09:21,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=696, PETRI_PLACES=98, PETRI_TRANSITIONS=96} [2023-08-30 00:09:21,940 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 39 predicate places. [2023-08-30 00:09:21,941 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 96 transitions, 696 flow [2023-08-30 00:09:21,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 160.5) internal successors, (1284), 8 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:21,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:09:21,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:09:21,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 00:09:22,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:09:22,151 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:09:22,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:09:22,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1676343959, now seen corresponding path program 1 times [2023-08-30 00:09:22,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:09:22,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [301700327] [2023-08-30 00:09:22,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:09:22,152 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:09:22,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:09:22,153 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:09:22,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 00:09:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:09:22,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:09:22,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:09:22,380 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:09:22,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:09:22,441 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 00:09:22,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 00:09:22,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:09:22,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:09:22,470 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:09:22,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [301700327] [2023-08-30 00:09:22,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [301700327] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:09:22,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:09:22,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:09:22,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622850169] [2023-08-30 00:09:22,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:09:22,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:09:22,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:09:22,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:09:22,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:09:22,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 456 [2023-08-30 00:09:22,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 96 transitions, 696 flow. Second operand has 4 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:22,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:09:22,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 456 [2023-08-30 00:09:22,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:09:30,410 INFO L130 PetriNetUnfolder]: 35332/47038 cut-off events. [2023-08-30 00:09:30,410 INFO L131 PetriNetUnfolder]: For 35210/35210 co-relation queries the response was YES. [2023-08-30 00:09:30,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132351 conditions, 47038 events. 35332/47038 cut-off events. For 35210/35210 co-relation queries the response was YES. Maximal size of possible extension queue 2178. Compared 289899 event pairs, 17847 based on Foata normal form. 0/21541 useless extension candidates. Maximal degree in co-relation 132315. Up to 46458 conditions per place. [2023-08-30 00:09:30,714 INFO L137 encePairwiseOnDemand]: 451/456 looper letters, 78 selfloop transitions, 12 changer transitions 0/93 dead transitions. [2023-08-30 00:09:30,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 93 transitions, 864 flow [2023-08-30 00:09:30,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:09:30,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:09:30,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 744 transitions. [2023-08-30 00:09:30,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40789473684210525 [2023-08-30 00:09:30,716 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 744 transitions. [2023-08-30 00:09:30,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 744 transitions. [2023-08-30 00:09:30,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:09:30,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 744 transitions. [2023-08-30 00:09:30,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:30,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 456.0) internal successors, (2280), 5 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:30,721 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 456.0) internal successors, (2280), 5 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:30,721 INFO L175 Difference]: Start difference. First operand has 98 places, 96 transitions, 696 flow. Second operand 4 states and 744 transitions. [2023-08-30 00:09:30,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 93 transitions, 864 flow [2023-08-30 00:09:30,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 93 transitions, 843 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 00:09:30,776 INFO L231 Difference]: Finished difference. Result has 97 places, 93 transitions, 687 flow [2023-08-30 00:09:30,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=687, PETRI_PLACES=97, PETRI_TRANSITIONS=93} [2023-08-30 00:09:30,777 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 38 predicate places. [2023-08-30 00:09:30,777 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 93 transitions, 687 flow [2023-08-30 00:09:30,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:30,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:09:30,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:09:30,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 00:09:30,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:09:30,978 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:09:30,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:09:30,979 INFO L85 PathProgramCache]: Analyzing trace with hash -735629242, now seen corresponding path program 1 times [2023-08-30 00:09:30,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:09:30,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1835794093] [2023-08-30 00:09:30,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:09:30,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:09:30,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:09:30,980 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:09:31,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 00:09:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:09:31,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:09:31,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:09:31,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:09:31,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:09:31,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:09:31,206 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 00:09:31,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 00:09:31,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-08-30 00:09:31,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:09:31,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:09:31,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:09:31,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:09:31,350 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:09:31,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1835794093] [2023-08-30 00:09:31,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1835794093] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:09:31,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:09:31,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:09:31,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061012950] [2023-08-30 00:09:31,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:09:31,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:09:31,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:09:31,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:09:31,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:09:31,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 456 [2023-08-30 00:09:31,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 93 transitions, 687 flow. Second operand has 4 states, 4 states have (on average 181.75) internal successors, (727), 4 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:31,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:09:31,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 456 [2023-08-30 00:09:31,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:09:38,256 INFO L130 PetriNetUnfolder]: 33370/44293 cut-off events. [2023-08-30 00:09:38,256 INFO L131 PetriNetUnfolder]: For 32788/32788 co-relation queries the response was YES. [2023-08-30 00:09:38,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124217 conditions, 44293 events. 33370/44293 cut-off events. For 32788/32788 co-relation queries the response was YES. Maximal size of possible extension queue 2058. Compared 268346 event pairs, 16803 based on Foata normal form. 0/20740 useless extension candidates. Maximal degree in co-relation 124180. Up to 43726 conditions per place. [2023-08-30 00:09:38,719 INFO L137 encePairwiseOnDemand]: 453/456 looper letters, 87 selfloop transitions, 1 changer transitions 0/91 dead transitions. [2023-08-30 00:09:38,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 91 transitions, 859 flow [2023-08-30 00:09:38,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:09:38,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:09:38,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 577 transitions. [2023-08-30 00:09:38,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42178362573099415 [2023-08-30 00:09:38,723 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 577 transitions. [2023-08-30 00:09:38,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 577 transitions. [2023-08-30 00:09:38,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:09:38,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 577 transitions. [2023-08-30 00:09:38,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:38,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:38,728 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:38,728 INFO L175 Difference]: Start difference. First operand has 97 places, 93 transitions, 687 flow. Second operand 3 states and 577 transitions. [2023-08-30 00:09:38,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 91 transitions, 859 flow [2023-08-30 00:09:38,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 91 transitions, 846 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:09:38,801 INFO L231 Difference]: Finished difference. Result has 95 places, 91 transitions, 672 flow [2023-08-30 00:09:38,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=670, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=672, PETRI_PLACES=95, PETRI_TRANSITIONS=91} [2023-08-30 00:09:38,803 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 36 predicate places. [2023-08-30 00:09:38,803 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 91 transitions, 672 flow [2023-08-30 00:09:38,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.75) internal successors, (727), 4 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:38,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:09:38,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:09:38,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 00:09:39,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:09:39,018 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:09:39,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:09:39,018 INFO L85 PathProgramCache]: Analyzing trace with hash -735629243, now seen corresponding path program 1 times [2023-08-30 00:09:39,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:09:39,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183415775] [2023-08-30 00:09:39,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:09:39,019 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:09:39,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:09:39,022 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:09:39,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 00:09:39,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:09:39,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:09:39,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:09:39,342 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 00:09:39,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-08-30 00:09:39,439 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 00:09:39,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 00:09:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:09:39,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:09:39,479 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:09:39,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183415775] [2023-08-30 00:09:39,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183415775] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:09:39,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:09:39,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:09:39,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370821619] [2023-08-30 00:09:39,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:09:39,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:09:39,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:09:39,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:09:39,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:09:39,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 456 [2023-08-30 00:09:39,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 91 transitions, 672 flow. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:39,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:09:39,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 456 [2023-08-30 00:09:39,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:09:45,067 INFO L130 PetriNetUnfolder]: 31408/41548 cut-off events. [2023-08-30 00:09:45,067 INFO L131 PetriNetUnfolder]: For 29576/29576 co-relation queries the response was YES. [2023-08-30 00:09:45,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116081 conditions, 41548 events. 31408/41548 cut-off events. For 29576/29576 co-relation queries the response was YES. Maximal size of possible extension queue 1890. Compared 247928 event pairs, 15759 based on Foata normal form. 0/19939 useless extension candidates. Maximal degree in co-relation 116044. Up to 40981 conditions per place. [2023-08-30 00:09:45,456 INFO L137 encePairwiseOnDemand]: 453/456 looper letters, 85 selfloop transitions, 1 changer transitions 0/89 dead transitions. [2023-08-30 00:09:45,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 89 transitions, 840 flow [2023-08-30 00:09:45,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:09:45,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:09:45,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 572 transitions. [2023-08-30 00:09:45,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41812865497076024 [2023-08-30 00:09:45,459 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 572 transitions. [2023-08-30 00:09:45,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 572 transitions. [2023-08-30 00:09:45,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:09:45,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 572 transitions. [2023-08-30 00:09:45,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:45,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:45,462 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:45,462 INFO L175 Difference]: Start difference. First operand has 95 places, 91 transitions, 672 flow. Second operand 3 states and 572 transitions. [2023-08-30 00:09:45,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 89 transitions, 840 flow [2023-08-30 00:09:45,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 89 transitions, 839 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:09:45,519 INFO L231 Difference]: Finished difference. Result has 94 places, 89 transitions, 669 flow [2023-08-30 00:09:45,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=669, PETRI_PLACES=94, PETRI_TRANSITIONS=89} [2023-08-30 00:09:45,520 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 35 predicate places. [2023-08-30 00:09:45,520 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 89 transitions, 669 flow [2023-08-30 00:09:45,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:45,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:09:45,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:09:45,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 00:09:45,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:09:45,732 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:09:45,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:09:45,732 INFO L85 PathProgramCache]: Analyzing trace with hash -346912066, now seen corresponding path program 1 times [2023-08-30 00:09:45,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:09:45,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555025038] [2023-08-30 00:09:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:09:45,733 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:09:45,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:09:45,734 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:09:45,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 00:09:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:09:45,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 00:09:45,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:09:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:09:45,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:09:45,922 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:09:45,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555025038] [2023-08-30 00:09:45,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555025038] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:09:45,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:09:45,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:09:45,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080764947] [2023-08-30 00:09:45,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:09:45,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:09:45,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:09:45,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:09:45,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:09:45,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 456 [2023-08-30 00:09:45,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 89 transitions, 669 flow. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:45,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:09:45,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 456 [2023-08-30 00:09:45,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:09:51,258 INFO L130 PetriNetUnfolder]: 25558/34294 cut-off events. [2023-08-30 00:09:51,259 INFO L131 PetriNetUnfolder]: For 18218/18218 co-relation queries the response was YES. [2023-08-30 00:09:51,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92592 conditions, 34294 events. 25558/34294 cut-off events. For 18218/18218 co-relation queries the response was YES. Maximal size of possible extension queue 1681. Compared 205269 event pairs, 3528 based on Foata normal form. 720/17428 useless extension candidates. Maximal degree in co-relation 92554. Up to 32689 conditions per place. [2023-08-30 00:09:51,588 INFO L137 encePairwiseOnDemand]: 449/456 looper letters, 96 selfloop transitions, 3 changer transitions 0/102 dead transitions. [2023-08-30 00:09:51,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 102 transitions, 915 flow [2023-08-30 00:09:51,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:09:51,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:09:51,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2023-08-30 00:09:51,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4422514619883041 [2023-08-30 00:09:51,607 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2023-08-30 00:09:51,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2023-08-30 00:09:51,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:09:51,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2023-08-30 00:09:51,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:51,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:51,620 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:51,620 INFO L175 Difference]: Start difference. First operand has 94 places, 89 transitions, 669 flow. Second operand 3 states and 605 transitions. [2023-08-30 00:09:51,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 102 transitions, 915 flow [2023-08-30 00:09:51,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 102 transitions, 914 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:09:51,660 INFO L231 Difference]: Finished difference. Result has 96 places, 91 transitions, 697 flow [2023-08-30 00:09:51,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=697, PETRI_PLACES=96, PETRI_TRANSITIONS=91} [2023-08-30 00:09:51,661 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 37 predicate places. [2023-08-30 00:09:51,661 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 91 transitions, 697 flow [2023-08-30 00:09:51,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:51,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:09:51,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:09:51,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 00:09:51,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:09:51,872 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:09:51,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:09:51,872 INFO L85 PathProgramCache]: Analyzing trace with hash 2088057717, now seen corresponding path program 1 times [2023-08-30 00:09:51,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:09:51,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039515967] [2023-08-30 00:09:51,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:09:51,873 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:09:51,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:09:51,874 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:09:51,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 00:09:51,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:09:51,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:09:51,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:09:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:09:52,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:09:52,055 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:09:52,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039515967] [2023-08-30 00:09:52,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039515967] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:09:52,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:09:52,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:09:52,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86406789] [2023-08-30 00:09:52,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:09:52,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:09:52,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:09:52,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:09:52,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:09:52,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 456 [2023-08-30 00:09:52,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 91 transitions, 697 flow. Second operand has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:52,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:09:52,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 456 [2023-08-30 00:09:52,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:09:57,105 INFO L130 PetriNetUnfolder]: 21454/30496 cut-off events. [2023-08-30 00:09:57,106 INFO L131 PetriNetUnfolder]: For 26237/26237 co-relation queries the response was YES. [2023-08-30 00:09:57,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91388 conditions, 30496 events. 21454/30496 cut-off events. For 26237/26237 co-relation queries the response was YES. Maximal size of possible extension queue 1531. Compared 193454 event pairs, 4626 based on Foata normal form. 702/16546 useless extension candidates. Maximal degree in co-relation 91348. Up to 25237 conditions per place. [2023-08-30 00:09:57,425 INFO L137 encePairwiseOnDemand]: 449/456 looper letters, 98 selfloop transitions, 3 changer transitions 2/106 dead transitions. [2023-08-30 00:09:57,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 106 transitions, 981 flow [2023-08-30 00:09:57,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:09:57,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:09:57,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 607 transitions. [2023-08-30 00:09:57,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44371345029239767 [2023-08-30 00:09:57,436 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 607 transitions. [2023-08-30 00:09:57,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 607 transitions. [2023-08-30 00:09:57,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:09:57,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 607 transitions. [2023-08-30 00:09:57,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:57,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:57,464 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:57,465 INFO L175 Difference]: Start difference. First operand has 96 places, 91 transitions, 697 flow. Second operand 3 states and 607 transitions. [2023-08-30 00:09:57,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 106 transitions, 981 flow [2023-08-30 00:09:57,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 106 transitions, 978 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:09:57,500 INFO L231 Difference]: Finished difference. Result has 98 places, 91 transitions, 707 flow [2023-08-30 00:09:57,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=707, PETRI_PLACES=98, PETRI_TRANSITIONS=91} [2023-08-30 00:09:57,501 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 39 predicate places. [2023-08-30 00:09:57,501 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 91 transitions, 707 flow [2023-08-30 00:09:57,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:57,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:09:57,502 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 1, 1, 1] [2023-08-30 00:09:57,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 00:09:57,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:09:57,713 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:09:57,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:09:57,713 INFO L85 PathProgramCache]: Analyzing trace with hash 2103394795, now seen corresponding path program 1 times [2023-08-30 00:09:57,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:09:57,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269445929] [2023-08-30 00:09:57,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:09:57,714 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:09:57,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:09:57,715 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:09:57,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 00:09:57,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:09:57,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 00:09:57,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:09:57,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 00:09:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:09:58,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:10:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:10:00,710 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:10:00,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269445929] [2023-08-30 00:10:00,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [269445929] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:10:00,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:10:00,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2023-08-30 00:10:00,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026200117] [2023-08-30 00:10:00,710 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:10:00,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 00:10:00,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:10:00,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 00:10:00,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2023-08-30 00:10:18,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 456 [2023-08-30 00:10:18,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 91 transitions, 707 flow. Second operand has 18 states, 18 states have (on average 171.05555555555554) internal successors, (3079), 18 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:18,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:10:18,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 456 [2023-08-30 00:10:18,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:10:21,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:10:23,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:10:25,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:10:27,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:10:29,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:10:31,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:10:52,935 INFO L130 PetriNetUnfolder]: 38129/54162 cut-off events. [2023-08-30 00:10:52,935 INFO L131 PetriNetUnfolder]: For 51632/51632 co-relation queries the response was YES. [2023-08-30 00:10:53,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184169 conditions, 54162 events. 38129/54162 cut-off events. For 51632/51632 co-relation queries the response was YES. Maximal size of possible extension queue 1784. Compared 353624 event pairs, 18016 based on Foata normal form. 33/28327 useless extension candidates. Maximal degree in co-relation 184127. Up to 21377 conditions per place. [2023-08-30 00:10:53,502 INFO L137 encePairwiseOnDemand]: 449/456 looper letters, 535 selfloop transitions, 46 changer transitions 0/584 dead transitions. [2023-08-30 00:10:53,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 584 transitions, 4380 flow [2023-08-30 00:10:53,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 00:10:53,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 00:10:53,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3546 transitions. [2023-08-30 00:10:53,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43201754385964913 [2023-08-30 00:10:53,511 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3546 transitions. [2023-08-30 00:10:53,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3546 transitions. [2023-08-30 00:10:53,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:10:53,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3546 transitions. [2023-08-30 00:10:53,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 197.0) internal successors, (3546), 18 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:53,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 456.0) internal successors, (8664), 19 states have internal predecessors, (8664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:53,541 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 456.0) internal successors, (8664), 19 states have internal predecessors, (8664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:53,541 INFO L175 Difference]: Start difference. First operand has 98 places, 91 transitions, 707 flow. Second operand 18 states and 3546 transitions. [2023-08-30 00:10:53,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 584 transitions, 4380 flow [2023-08-30 00:10:53,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 584 transitions, 4341 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 00:10:53,646 INFO L231 Difference]: Finished difference. Result has 123 places, 103 transitions, 977 flow [2023-08-30 00:10:53,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=977, PETRI_PLACES=123, PETRI_TRANSITIONS=103} [2023-08-30 00:10:53,647 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 64 predicate places. [2023-08-30 00:10:53,647 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 103 transitions, 977 flow [2023-08-30 00:10:53,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 171.05555555555554) internal successors, (3079), 18 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:53,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:10:53,648 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 00:10:53,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 00:10:53,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:10:53,860 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:10:53,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:10:53,862 INFO L85 PathProgramCache]: Analyzing trace with hash 16129988, now seen corresponding path program 2 times [2023-08-30 00:10:53,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:10:53,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2107618216] [2023-08-30 00:10:53,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:10:53,862 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:10:53,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:10:53,863 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:10:53,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 00:10:54,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 00:10:54,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:10:54,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:10:54,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:10:54,257 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:10:54,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:10:54,500 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:10:54,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:10:54,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:10:54,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 00:10:54,716 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 00:10:54,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 00:10:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 00:10:54,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:10:54,798 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:10:54,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2107618216] [2023-08-30 00:10:54,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2107618216] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:10:54,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:10:54,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:10:54,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603999314] [2023-08-30 00:10:54,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:10:54,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:10:54,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:10:54,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:10:54,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:10:55,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 456 [2023-08-30 00:10:55,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 103 transitions, 977 flow. Second operand has 4 states, 4 states have (on average 172.5) internal successors, (690), 4 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:55,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:10:55,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 456 [2023-08-30 00:10:55,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:11:01,444 INFO L130 PetriNetUnfolder]: 28145/40178 cut-off events. [2023-08-30 00:11:01,444 INFO L131 PetriNetUnfolder]: For 41943/41943 co-relation queries the response was YES. [2023-08-30 00:11:01,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126929 conditions, 40178 events. 28145/40178 cut-off events. For 41943/41943 co-relation queries the response was YES. Maximal size of possible extension queue 1283. Compared 254311 event pairs, 11232 based on Foata normal form. 2000/22450 useless extension candidates. Maximal degree in co-relation 126877. Up to 39498 conditions per place. [2023-08-30 00:11:01,710 INFO L137 encePairwiseOnDemand]: 451/456 looper letters, 84 selfloop transitions, 13 changer transitions 0/100 dead transitions. [2023-08-30 00:11:01,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 100 transitions, 1139 flow [2023-08-30 00:11:01,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:11:01,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:11:01,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 717 transitions. [2023-08-30 00:11:01,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3930921052631579 [2023-08-30 00:11:01,712 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 717 transitions. [2023-08-30 00:11:01,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 717 transitions. [2023-08-30 00:11:01,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:11:01,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 717 transitions. [2023-08-30 00:11:01,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 179.25) internal successors, (717), 4 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:01,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 456.0) internal successors, (2280), 5 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:01,715 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 456.0) internal successors, (2280), 5 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:01,715 INFO L175 Difference]: Start difference. First operand has 123 places, 103 transitions, 977 flow. Second operand 4 states and 717 transitions. [2023-08-30 00:11:01,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 100 transitions, 1139 flow [2023-08-30 00:11:01,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 100 transitions, 1049 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-08-30 00:11:01,731 INFO L231 Difference]: Finished difference. Result has 113 places, 100 transitions, 881 flow [2023-08-30 00:11:01,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=881, PETRI_PLACES=113, PETRI_TRANSITIONS=100} [2023-08-30 00:11:01,732 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 54 predicate places. [2023-08-30 00:11:01,732 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 100 transitions, 881 flow [2023-08-30 00:11:01,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.5) internal successors, (690), 4 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:01,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:11:01,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:11:01,741 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 (18)] Ended with exit code 0 [2023-08-30 00:11:01,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:11:01,941 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:11:01,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:11:01,942 INFO L85 PathProgramCache]: Analyzing trace with hash -600185916, now seen corresponding path program 1 times [2023-08-30 00:11:01,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:11:01,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907142733] [2023-08-30 00:11:01,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:11:01,942 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:11:01,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:11:01,943 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:11:01,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 00:11:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:11:02,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:11:02,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:11:02,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:11:02,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:11:02,112 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:11:02,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907142733] [2023-08-30 00:11:02,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907142733] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:11:02,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:11:02,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:11:02,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178374558] [2023-08-30 00:11:02,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:11:02,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:11:02,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:11:02,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:11:02,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:11:02,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 456 [2023-08-30 00:11:02,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 100 transitions, 881 flow. Second operand has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:02,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:11:02,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 456 [2023-08-30 00:11:02,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:11:07,003 INFO L130 PetriNetUnfolder]: 26501/37916 cut-off events. [2023-08-30 00:11:07,003 INFO L131 PetriNetUnfolder]: For 9409/9409 co-relation queries the response was YES. [2023-08-30 00:11:07,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106681 conditions, 37916 events. 26501/37916 cut-off events. For 9409/9409 co-relation queries the response was YES. Maximal size of possible extension queue 1256. Compared 239737 event pairs, 10584 based on Foata normal form. 30/19529 useless extension candidates. Maximal degree in co-relation 106630. Up to 37030 conditions per place. [2023-08-30 00:11:07,352 INFO L137 encePairwiseOnDemand]: 448/456 looper letters, 80 selfloop transitions, 16 changer transitions 16/115 dead transitions. [2023-08-30 00:11:07,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 115 transitions, 1165 flow [2023-08-30 00:11:07,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:11:07,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:11:07,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 942 transitions. [2023-08-30 00:11:07,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131578947368421 [2023-08-30 00:11:07,356 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 942 transitions. [2023-08-30 00:11:07,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 942 transitions. [2023-08-30 00:11:07,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:11:07,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 942 transitions. [2023-08-30 00:11:07,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 188.4) internal successors, (942), 5 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:07,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 456.0) internal successors, (2736), 6 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:07,377 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 456.0) internal successors, (2736), 6 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:07,377 INFO L175 Difference]: Start difference. First operand has 113 places, 100 transitions, 881 flow. Second operand 5 states and 942 transitions. [2023-08-30 00:11:07,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 115 transitions, 1165 flow [2023-08-30 00:11:07,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 115 transitions, 1151 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:11:07,406 INFO L231 Difference]: Finished difference. Result has 117 places, 99 transitions, 922 flow [2023-08-30 00:11:07,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=922, PETRI_PLACES=117, PETRI_TRANSITIONS=99} [2023-08-30 00:11:07,407 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 58 predicate places. [2023-08-30 00:11:07,407 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 99 transitions, 922 flow [2023-08-30 00:11:07,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:07,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:11:07,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:11:07,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 00:11:07,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:11:07,619 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:11:07,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:11:07,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1549029583, now seen corresponding path program 1 times [2023-08-30 00:11:07,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:11:07,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1633953023] [2023-08-30 00:11:07,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:11:07,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:11:07,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:11:07,622 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:11:07,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 00:11:07,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:11:07,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:11:07,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:11:07,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 00:11:08,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:11:08,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:11:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:11:09,610 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:11:09,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1633953023] [2023-08-30 00:11:09,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1633953023] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:11:09,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:11:09,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-30 00:11:09,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118520151] [2023-08-30 00:11:09,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:11:09,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:11:09,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:11:09,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:11:09,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:11:13,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 456 [2023-08-30 00:11:13,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 99 transitions, 922 flow. Second operand has 8 states, 8 states have (on average 166.25) internal successors, (1330), 8 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:13,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:11:13,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 456 [2023-08-30 00:11:13,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:11:22,308 INFO L130 PetriNetUnfolder]: 24623/35270 cut-off events. [2023-08-30 00:11:22,309 INFO L131 PetriNetUnfolder]: For 14454/14454 co-relation queries the response was YES. [2023-08-30 00:11:22,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103695 conditions, 35270 events. 24623/35270 cut-off events. For 14454/14454 co-relation queries the response was YES. Maximal size of possible extension queue 1217. Compared 222069 event pairs, 9756 based on Foata normal form. 0/20333 useless extension candidates. Maximal degree in co-relation 103642. Up to 29629 conditions per place. [2023-08-30 00:11:22,644 INFO L137 encePairwiseOnDemand]: 447/456 looper letters, 112 selfloop transitions, 36 changer transitions 0/151 dead transitions. [2023-08-30 00:11:22,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 151 transitions, 1422 flow [2023-08-30 00:11:22,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 00:11:22,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 00:11:22,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1727 transitions. [2023-08-30 00:11:22,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787280701754386 [2023-08-30 00:11:22,649 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1727 transitions. [2023-08-30 00:11:22,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1727 transitions. [2023-08-30 00:11:22,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:11:22,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1727 transitions. [2023-08-30 00:11:22,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 172.7) internal successors, (1727), 10 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:22,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 456.0) internal successors, (5016), 11 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:22,655 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 456.0) internal successors, (5016), 11 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:22,655 INFO L175 Difference]: Start difference. First operand has 117 places, 99 transitions, 922 flow. Second operand 10 states and 1727 transitions. [2023-08-30 00:11:22,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 151 transitions, 1422 flow [2023-08-30 00:11:22,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 151 transitions, 1365 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-30 00:11:22,797 INFO L231 Difference]: Finished difference. Result has 123 places, 101 transitions, 989 flow [2023-08-30 00:11:22,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=989, PETRI_PLACES=123, PETRI_TRANSITIONS=101} [2023-08-30 00:11:22,798 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 64 predicate places. [2023-08-30 00:11:22,798 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 101 transitions, 989 flow [2023-08-30 00:11:22,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 166.25) internal successors, (1330), 8 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:22,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:11:22,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:11:22,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 00:11:22,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:11:22,999 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:11:22,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:11:22,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1559188313, now seen corresponding path program 1 times [2023-08-30 00:11:22,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:11:23,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816057047] [2023-08-30 00:11:23,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:11:23,000 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:11:23,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:11:23,001 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:11:23,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 00:11:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:11:23,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 00:11:23,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:11:23,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 00:11:23,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:11:23,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:11:23,164 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:11:23,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816057047] [2023-08-30 00:11:23,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816057047] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:11:23,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:11:23,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:11:23,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162008592] [2023-08-30 00:11:23,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:11:23,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:11:23,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:11:23,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:11:23,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:11:23,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 456 [2023-08-30 00:11:23,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 101 transitions, 989 flow. Second operand has 4 states, 4 states have (on average 178.5) internal successors, (714), 4 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:23,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:11:23,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 456 [2023-08-30 00:11:23,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:11:26,509 INFO L130 PetriNetUnfolder]: 16163/23678 cut-off events. [2023-08-30 00:11:26,509 INFO L131 PetriNetUnfolder]: For 18499/18499 co-relation queries the response was YES. [2023-08-30 00:11:26,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73197 conditions, 23678 events. 16163/23678 cut-off events. For 18499/18499 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 146427 event pairs, 6066 based on Foata normal form. 0/17063 useless extension candidates. Maximal degree in co-relation 73144. Up to 23061 conditions per place. [2023-08-30 00:11:26,776 INFO L137 encePairwiseOnDemand]: 452/456 looper letters, 74 selfloop transitions, 22 changer transitions 0/99 dead transitions. [2023-08-30 00:11:26,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 99 transitions, 1173 flow [2023-08-30 00:11:26,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:11:26,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:11:26,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 734 transitions. [2023-08-30 00:11:26,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024122807017544 [2023-08-30 00:11:26,778 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 734 transitions. [2023-08-30 00:11:26,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 734 transitions. [2023-08-30 00:11:26,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:11:26,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 734 transitions. [2023-08-30 00:11:26,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.5) internal successors, (734), 4 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:26,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 456.0) internal successors, (2280), 5 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:26,780 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 456.0) internal successors, (2280), 5 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:26,781 INFO L175 Difference]: Start difference. First operand has 123 places, 101 transitions, 989 flow. Second operand 4 states and 734 transitions. [2023-08-30 00:11:26,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 99 transitions, 1173 flow [2023-08-30 00:11:26,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 99 transitions, 1032 flow, removed 25 selfloop flow, removed 8 redundant places. [2023-08-30 00:11:26,832 INFO L231 Difference]: Finished difference. Result has 116 places, 99 transitions, 884 flow [2023-08-30 00:11:26,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=884, PETRI_PLACES=116, PETRI_TRANSITIONS=99} [2023-08-30 00:11:26,833 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 57 predicate places. [2023-08-30 00:11:26,833 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 99 transitions, 884 flow [2023-08-30 00:11:26,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 178.5) internal successors, (714), 4 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:26,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:11:26,833 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 1, 1] [2023-08-30 00:11:26,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 00:11:27,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:11:27,034 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:11:27,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:11:27,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1853081241, now seen corresponding path program 3 times [2023-08-30 00:11:27,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:11:27,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1093874270] [2023-08-30 00:11:27,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:11:27,035 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:11:27,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:11:27,036 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:11:27,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 00:11:27,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-08-30 00:11:27,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:11:27,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 00:11:27,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:11:27,334 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:11:27,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:11:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:11:28,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:11:32,758 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:11:32,759 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:11:32,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1093874270] [2023-08-30 00:11:32,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1093874270] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:11:32,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:11:32,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-08-30 00:11:32,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063899016] [2023-08-30 00:11:32,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:11:32,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 00:11:32,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:11:32,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 00:11:32,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2023-08-30 00:11:57,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 456 [2023-08-30 00:11:57,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 99 transitions, 884 flow. Second operand has 26 states, 26 states have (on average 171.0) internal successors, (4446), 26 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:57,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:11:57,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 456 [2023-08-30 00:11:57,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:12:06,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:12:08,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:12:10,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:12:12,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:12:14,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:12:16,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:12:18,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:12:20,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:12:22,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:12:24,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:12:43,488 INFO L130 PetriNetUnfolder]: 16176/23704 cut-off events. [2023-08-30 00:12:43,489 INFO L131 PetriNetUnfolder]: For 19558/19558 co-relation queries the response was YES. [2023-08-30 00:12:43,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73278 conditions, 23704 events. 16176/23704 cut-off events. For 19558/19558 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 146463 event pairs, 6066 based on Foata normal form. 13/17300 useless extension candidates. Maximal degree in co-relation 73227. Up to 9649 conditions per place. [2023-08-30 00:12:43,625 INFO L137 encePairwiseOnDemand]: 450/456 looper letters, 367 selfloop transitions, 73 changer transitions 0/443 dead transitions. [2023-08-30 00:12:43,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 443 transitions, 3430 flow [2023-08-30 00:12:43,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 00:12:43,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 00:12:43,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4782 transitions. [2023-08-30 00:12:43,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4033400809716599 [2023-08-30 00:12:43,631 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4782 transitions. [2023-08-30 00:12:43,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4782 transitions. [2023-08-30 00:12:43,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:12:43,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4782 transitions. [2023-08-30 00:12:43,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 183.92307692307693) internal successors, (4782), 26 states have internal predecessors, (4782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:43,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 456.0) internal successors, (12312), 27 states have internal predecessors, (12312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:43,643 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 456.0) internal successors, (12312), 27 states have internal predecessors, (12312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:43,643 INFO L175 Difference]: Start difference. First operand has 116 places, 99 transitions, 884 flow. Second operand 26 states and 4782 transitions. [2023-08-30 00:12:43,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 443 transitions, 3430 flow [2023-08-30 00:12:43,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 443 transitions, 3383 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:12:43,704 INFO L231 Difference]: Finished difference. Result has 153 places, 128 transitions, 1402 flow [2023-08-30 00:12:43,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=861, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1402, PETRI_PLACES=153, PETRI_TRANSITIONS=128} [2023-08-30 00:12:43,704 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 94 predicate places. [2023-08-30 00:12:43,705 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 128 transitions, 1402 flow [2023-08-30 00:12:43,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 171.0) internal successors, (4446), 26 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:43,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:12:43,705 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:12:43,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 00:12:43,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:12:43,906 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:12:43,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:12:43,907 INFO L85 PathProgramCache]: Analyzing trace with hash 367270212, now seen corresponding path program 1 times [2023-08-30 00:12:43,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:12:43,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910507858] [2023-08-30 00:12:43,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:12:43,907 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:12:43,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:12:43,908 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:12:43,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 00:12:44,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:12:44,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 00:12:44,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:12:44,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 00:12:44,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:12:44,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:12:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:12:46,651 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:12:46,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910507858] [2023-08-30 00:12:46,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910507858] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:12:46,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:12:46,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-30 00:12:46,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346138556] [2023-08-30 00:12:46,651 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:12:46,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 00:12:46,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:12:46,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 00:12:46,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-08-30 00:13:06,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 456 [2023-08-30 00:13:06,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 128 transitions, 1402 flow. Second operand has 14 states, 14 states have (on average 165.71428571428572) internal successors, (2320), 14 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:06,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:13:06,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 456 [2023-08-30 00:13:06,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:13:11,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:13:13,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:13:16,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:13:18,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:13:36,613 INFO L130 PetriNetUnfolder]: 13368/19816 cut-off events. [2023-08-30 00:13:36,613 INFO L131 PetriNetUnfolder]: For 17942/17942 co-relation queries the response was YES. [2023-08-30 00:13:36,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59345 conditions, 19816 events. 13368/19816 cut-off events. For 17942/17942 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 120542 event pairs, 4878 based on Foata normal form. 1296/15379 useless extension candidates. Maximal degree in co-relation 59280. Up to 10033 conditions per place. [2023-08-30 00:13:36,711 INFO L137 encePairwiseOnDemand]: 447/456 looper letters, 176 selfloop transitions, 76 changer transitions 0/255 dead transitions. [2023-08-30 00:13:36,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 255 transitions, 2444 flow [2023-08-30 00:13:36,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 00:13:36,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 00:13:36,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3764 transitions. [2023-08-30 00:13:36,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3751993620414673 [2023-08-30 00:13:36,717 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3764 transitions. [2023-08-30 00:13:36,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3764 transitions. [2023-08-30 00:13:36,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:13:36,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3764 transitions. [2023-08-30 00:13:36,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 171.0909090909091) internal successors, (3764), 22 states have internal predecessors, (3764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:36,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 456.0) internal successors, (10488), 23 states have internal predecessors, (10488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:36,725 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 456.0) internal successors, (10488), 23 states have internal predecessors, (10488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:36,725 INFO L175 Difference]: Start difference. First operand has 153 places, 128 transitions, 1402 flow. Second operand 22 states and 3764 transitions. [2023-08-30 00:13:36,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 255 transitions, 2444 flow [2023-08-30 00:13:36,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 255 transitions, 2279 flow, removed 45 selfloop flow, removed 9 redundant places. [2023-08-30 00:13:36,773 INFO L231 Difference]: Finished difference. Result has 168 places, 140 transitions, 1580 flow [2023-08-30 00:13:36,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1580, PETRI_PLACES=168, PETRI_TRANSITIONS=140} [2023-08-30 00:13:36,773 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 109 predicate places. [2023-08-30 00:13:36,774 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 140 transitions, 1580 flow [2023-08-30 00:13:36,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 165.71428571428572) internal successors, (2320), 14 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:36,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:13:36,774 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 1, 1, 1] [2023-08-30 00:13:36,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 00:13:36,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:36,977 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:13:36,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:13:36,977 INFO L85 PathProgramCache]: Analyzing trace with hash -2103147793, now seen corresponding path program 2 times [2023-08-30 00:13:36,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:13:36,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1830391601] [2023-08-30 00:13:36,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:13:36,978 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:36,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:13:36,978 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:13:36,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 00:13:37,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:13:37,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:13:37,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 00:13:37,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:13:37,184 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 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 00:13:37,980 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:13:37,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:13:43,438 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:13:43,439 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:13:43,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1830391601] [2023-08-30 00:13:43,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1830391601] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:13:43,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:13:43,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2023-08-30 00:13:43,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061201474] [2023-08-30 00:13:43,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:13:43,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 00:13:43,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:13:43,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 00:13:43,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2023-08-30 00:14:27,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 456 [2023-08-30 00:14:27,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 140 transitions, 1580 flow. Second operand has 36 states, 36 states have (on average 171.02777777777777) internal successors, (6157), 36 states have internal predecessors, (6157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:27,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:14:27,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 456 [2023-08-30 00:14:27,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:14:43,256 WARN L222 SmtUtils]: Spent 9.41s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:14:45,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:14:47,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:14:49,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:14:51,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:14:53,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:14:55,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:14:57,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:14:59,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:15:01,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:15:03,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:15:05,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:15:07,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:15:09,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:15:11,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:15:13,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:15:15,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:15:28,239 WARN L222 SmtUtils]: Spent 5.64s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:15:35,232 WARN L222 SmtUtils]: Spent 5.41s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:16:14,353 INFO L130 PetriNetUnfolder]: 34428/50524 cut-off events. [2023-08-30 00:16:14,353 INFO L131 PetriNetUnfolder]: For 93160/93160 co-relation queries the response was YES. [2023-08-30 00:16:14,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168456 conditions, 50524 events. 34428/50524 cut-off events. For 93160/93160 co-relation queries the response was YES. Maximal size of possible extension queue 848. Compared 323642 event pairs, 12870 based on Foata normal form. 72/36763 useless extension candidates. Maximal degree in co-relation 168387. Up to 20593 conditions per place. [2023-08-30 00:16:14,811 INFO L137 encePairwiseOnDemand]: 450/456 looper letters, 917 selfloop transitions, 86 changer transitions 0/1006 dead transitions. [2023-08-30 00:16:14,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 1006 transitions, 8030 flow [2023-08-30 00:16:14,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 00:16:14,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 00:16:14,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 6927 transitions. [2023-08-30 00:16:14,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42196637426900585 [2023-08-30 00:16:14,819 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 6927 transitions. [2023-08-30 00:16:14,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 6927 transitions. [2023-08-30 00:16:14,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:16:14,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 6927 transitions. [2023-08-30 00:16:14,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 192.41666666666666) internal successors, (6927), 36 states have internal predecessors, (6927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:16:14,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 456.0) internal successors, (16872), 37 states have internal predecessors, (16872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:16:14,838 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 456.0) internal successors, (16872), 37 states have internal predecessors, (16872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:16:14,838 INFO L175 Difference]: Start difference. First operand has 168 places, 140 transitions, 1580 flow. Second operand 36 states and 6927 transitions. [2023-08-30 00:16:14,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 1006 transitions, 8030 flow [2023-08-30 00:16:15,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 1006 transitions, 7794 flow, removed 54 selfloop flow, removed 18 redundant places. [2023-08-30 00:16:15,186 INFO L231 Difference]: Finished difference. Result has 204 places, 161 transitions, 1896 flow [2023-08-30 00:16:15,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1896, PETRI_PLACES=204, PETRI_TRANSITIONS=161} [2023-08-30 00:16:15,186 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 145 predicate places. [2023-08-30 00:16:15,186 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 161 transitions, 1896 flow [2023-08-30 00:16:15,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 171.02777777777777) internal successors, (6157), 36 states have internal predecessors, (6157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:16:15,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:16:15,187 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:16:15,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 00:16:15,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:16:15,388 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:16:15,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:16:15,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1516683652, now seen corresponding path program 2 times [2023-08-30 00:16:15,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:16:15,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1507632459] [2023-08-30 00:16:15,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:16:15,389 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:16:15,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:16:15,390 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:16:15,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 00:16:15,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 00:16:15,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:16:15,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 00:16:15,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:16:15,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 00:16:15,761 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 00:16:15,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:16:15,761 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:16:15,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1507632459] [2023-08-30 00:16:15,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1507632459] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:16:15,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:16:15,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:16:15,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524719788] [2023-08-30 00:16:15,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:16:15,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:16:15,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:16:15,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:16:15,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:16:15,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 456 [2023-08-30 00:16:15,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 161 transitions, 1896 flow. Second operand has 4 states, 4 states have (on average 178.5) internal successors, (714), 4 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:16:15,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:16:15,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 456 [2023-08-30 00:16:15,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:16:21,609 INFO L130 PetriNetUnfolder]: 23196/34972 cut-off events. [2023-08-30 00:16:21,609 INFO L131 PetriNetUnfolder]: For 75994/75994 co-relation queries the response was YES. [2023-08-30 00:16:21,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99120 conditions, 34972 events. 23196/34972 cut-off events. For 75994/75994 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 221649 event pairs, 8118 based on Foata normal form. 5040/28627 useless extension candidates. Maximal degree in co-relation 99038. Up to 33789 conditions per place. [2023-08-30 00:16:21,890 INFO L137 encePairwiseOnDemand]: 452/456 looper letters, 92 selfloop transitions, 64 changer transitions 0/159 dead transitions. [2023-08-30 00:16:21,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 159 transitions, 2184 flow [2023-08-30 00:16:21,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:16:21,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:16:21,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 732 transitions. [2023-08-30 00:16:21,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40131578947368424 [2023-08-30 00:16:21,895 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 732 transitions. [2023-08-30 00:16:21,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 732 transitions. [2023-08-30 00:16:21,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:16:21,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 732 transitions. [2023-08-30 00:16:21,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:16:21,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 456.0) internal successors, (2280), 5 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:16:21,898 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 456.0) internal successors, (2280), 5 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:16:21,898 INFO L175 Difference]: Start difference. First operand has 204 places, 161 transitions, 1896 flow. Second operand 4 states and 732 transitions. [2023-08-30 00:16:21,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 159 transitions, 2184 flow [2023-08-30 00:16:21,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 159 transitions, 1980 flow, removed 19 selfloop flow, removed 19 redundant places. [2023-08-30 00:16:21,951 INFO L231 Difference]: Finished difference. Result has 186 places, 159 transitions, 1796 flow [2023-08-30 00:16:21,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1796, PETRI_PLACES=186, PETRI_TRANSITIONS=159} [2023-08-30 00:16:21,951 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 127 predicate places. [2023-08-30 00:16:21,952 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 159 transitions, 1796 flow [2023-08-30 00:16:21,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 178.5) internal successors, (714), 4 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:16:21,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:16:21,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:16:21,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-30 00:16:22,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:16:22,153 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:16:22,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:16:22,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1971163334, now seen corresponding path program 1 times [2023-08-30 00:16:22,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:16:22,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [694423242] [2023-08-30 00:16:22,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:16:22,154 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 [2023-08-30 00:16:22,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:16:22,155 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:16:22,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 00:16:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:16:22,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 00:16:22,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:16:22,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:16:22,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 00:16:23,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:16:23,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:16:23,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:16:23,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [694423242] [2023-08-30 00:16:23,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [694423242] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:16:23,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:16:23,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 00:16:23,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928156672] [2023-08-30 00:16:23,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:16:23,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 00:16:23,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:16:23,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 00:16:23,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-08-30 00:16:26,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 456 [2023-08-30 00:16:26,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 159 transitions, 1796 flow. Second operand has 9 states, 9 states have (on average 163.44444444444446) internal successors, (1471), 9 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:16:26,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:16:26,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 456 [2023-08-30 00:16:26,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:16:34,245 INFO L130 PetriNetUnfolder]: 27846/44205 cut-off events. [2023-08-30 00:16:34,245 INFO L131 PetriNetUnfolder]: For 16873/16873 co-relation queries the response was YES. [2023-08-30 00:16:34,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122831 conditions, 44205 events. 27846/44205 cut-off events. For 16873/16873 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 312559 event pairs, 5739 based on Foata normal form. 99/32325 useless extension candidates. Maximal degree in co-relation 122754. Up to 35542 conditions per place. [2023-08-30 00:16:34,686 INFO L137 encePairwiseOnDemand]: 445/456 looper letters, 138 selfloop transitions, 32 changer transitions 22/194 dead transitions. [2023-08-30 00:16:34,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 194 transitions, 2269 flow [2023-08-30 00:16:34,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:16:34,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:16:34,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1355 transitions. [2023-08-30 00:16:34,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37143640350877194 [2023-08-30 00:16:34,690 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1355 transitions. [2023-08-30 00:16:34,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1355 transitions. [2023-08-30 00:16:34,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:16:34,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1355 transitions. [2023-08-30 00:16:34,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 169.375) internal successors, (1355), 8 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:16:34,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 456.0) internal successors, (4104), 9 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:16:34,695 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 456.0) internal successors, (4104), 9 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:16:34,695 INFO L175 Difference]: Start difference. First operand has 186 places, 159 transitions, 1796 flow. Second operand 8 states and 1355 transitions. [2023-08-30 00:16:34,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 194 transitions, 2269 flow [2023-08-30 00:16:34,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 194 transitions, 2180 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:16:34,734 INFO L231 Difference]: Finished difference. Result has 195 places, 163 transitions, 1806 flow [2023-08-30 00:16:34,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1806, PETRI_PLACES=195, PETRI_TRANSITIONS=163} [2023-08-30 00:16:34,735 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 136 predicate places. [2023-08-30 00:16:34,735 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 163 transitions, 1806 flow [2023-08-30 00:16:34,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 163.44444444444446) internal successors, (1471), 9 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:16:34,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:16:34,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:16:34,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2023-08-30 00:16:34,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:16:34,941 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:16:34,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:16:34,941 INFO L85 PathProgramCache]: Analyzing trace with hash 604572850, now seen corresponding path program 2 times [2023-08-30 00:16:34,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:16:34,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498420574] [2023-08-30 00:16:34,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:16:34,941 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:16:34,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:16:34,942 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:16:34,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 00:16:35,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 00:16:35,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:16:35,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 00:16:35,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:16:35,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-08-30 00:16:35,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 00:16:35,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 00:16:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:16:36,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:16:36,115 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:16:36,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498420574] [2023-08-30 00:16:36,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498420574] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:16:36,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:16:36,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-30 00:16:36,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180105807] [2023-08-30 00:16:36,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:16:36,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:16:36,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:16:36,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:16:36,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:16:38,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:16:41,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:16:43,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 456 [2023-08-30 00:16:43,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 163 transitions, 1806 flow. Second operand has 10 states, 10 states have (on average 160.2) internal successors, (1602), 10 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:16:43,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:16:43,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 456 [2023-08-30 00:16:43,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:16:46,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:16:48,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:16:56,699 INFO L130 PetriNetUnfolder]: 29331/49947 cut-off events. [2023-08-30 00:16:56,699 INFO L131 PetriNetUnfolder]: For 49842/49842 co-relation queries the response was YES. [2023-08-30 00:16:57,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160782 conditions, 49947 events. 29331/49947 cut-off events. For 49842/49842 co-relation queries the response was YES. Maximal size of possible extension queue 826. Compared 399956 event pairs, 6135 based on Foata normal form. 99/39057 useless extension candidates. Maximal degree in co-relation 160700. Up to 37522 conditions per place. [2023-08-30 00:16:57,145 INFO L137 encePairwiseOnDemand]: 444/456 looper letters, 141 selfloop transitions, 32 changer transitions 25/200 dead transitions. [2023-08-30 00:16:57,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 200 transitions, 2327 flow [2023-08-30 00:16:57,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:16:57,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:16:57,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1331 transitions. [2023-08-30 00:16:57,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36485745614035087 [2023-08-30 00:16:57,148 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1331 transitions. [2023-08-30 00:16:57,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1331 transitions. [2023-08-30 00:16:57,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:16:57,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1331 transitions. [2023-08-30 00:16:57,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 166.375) internal successors, (1331), 8 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:16:57,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 456.0) internal successors, (4104), 9 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:16:57,153 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 456.0) internal successors, (4104), 9 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:16:57,153 INFO L175 Difference]: Start difference. First operand has 195 places, 163 transitions, 1806 flow. Second operand 8 states and 1331 transitions. [2023-08-30 00:16:57,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 200 transitions, 2327 flow [2023-08-30 00:16:57,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 200 transitions, 2286 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-30 00:16:57,746 INFO L231 Difference]: Finished difference. Result has 201 places, 167 transitions, 1882 flow [2023-08-30 00:16:57,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=1769, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1882, PETRI_PLACES=201, PETRI_TRANSITIONS=167} [2023-08-30 00:16:57,747 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 142 predicate places. [2023-08-30 00:16:57,747 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 167 transitions, 1882 flow [2023-08-30 00:16:57,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 160.2) internal successors, (1602), 10 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:16:57,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:16:57,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:16:57,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-08-30 00:16:57,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:16:57,948 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:16:57,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:16:57,949 INFO L85 PathProgramCache]: Analyzing trace with hash 680043314, now seen corresponding path program 3 times [2023-08-30 00:16:57,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:16:57,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949513499] [2023-08-30 00:16:57,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:16:57,949 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:16:57,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:16:57,950 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:16:57,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-30 00:16:58,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 00:16:58,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:16:58,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 00:16:58,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:16:58,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2023-08-30 00:16:59,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:16:59,141 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-30 00:16:59,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 97 treesize of output 94 [2023-08-30 00:16:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:16:59,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:16:59,395 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:16:59,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949513499] [2023-08-30 00:16:59,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949513499] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:16:59,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:16:59,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-30 00:16:59,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838878379] [2023-08-30 00:16:59,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:16:59,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:16:59,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:16:59,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:16:59,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:17:01,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:17:04,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:17:06,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 456 [2023-08-30 00:17:06,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 167 transitions, 1882 flow. Second operand has 10 states, 10 states have (on average 161.2) internal successors, (1612), 10 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:06,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:17:06,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 456 [2023-08-30 00:17:06,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:17:09,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:17:18,500 INFO L130 PetriNetUnfolder]: 28539/48660 cut-off events. [2023-08-30 00:17:18,500 INFO L131 PetriNetUnfolder]: For 77821/77821 co-relation queries the response was YES. [2023-08-30 00:17:18,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175260 conditions, 48660 events. 28539/48660 cut-off events. For 77821/77821 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 387130 event pairs, 6630 based on Foata normal form. 99/37869 useless extension candidates. Maximal degree in co-relation 175176. Up to 39106 conditions per place. [2023-08-30 00:17:18,936 INFO L137 encePairwiseOnDemand]: 446/456 looper letters, 164 selfloop transitions, 4 changer transitions 33/203 dead transitions. [2023-08-30 00:17:18,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 203 transitions, 2388 flow [2023-08-30 00:17:18,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:17:18,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:17:18,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1343 transitions. [2023-08-30 00:17:18,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36814692982456143 [2023-08-30 00:17:18,939 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1343 transitions. [2023-08-30 00:17:18,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1343 transitions. [2023-08-30 00:17:18,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:17:18,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1343 transitions. [2023-08-30 00:17:18,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 167.875) internal successors, (1343), 8 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:18,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 456.0) internal successors, (4104), 9 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:18,942 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 456.0) internal successors, (4104), 9 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:18,942 INFO L175 Difference]: Start difference. First operand has 201 places, 167 transitions, 1882 flow. Second operand 8 states and 1343 transitions. [2023-08-30 00:17:18,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 203 transitions, 2388 flow [2023-08-30 00:17:20,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 203 transitions, 2323 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-30 00:17:20,175 INFO L231 Difference]: Finished difference. Result has 206 places, 164 transitions, 1809 flow [2023-08-30 00:17:20,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=1819, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1809, PETRI_PLACES=206, PETRI_TRANSITIONS=164} [2023-08-30 00:17:20,176 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 147 predicate places. [2023-08-30 00:17:20,176 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 164 transitions, 1809 flow [2023-08-30 00:17:20,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 161.2) internal successors, (1612), 10 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:20,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:17:20,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:17:20,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2023-08-30 00:17:20,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:20,379 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:17:20,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:17:20,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1054549698, now seen corresponding path program 4 times [2023-08-30 00:17:20,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:17:20,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017819333] [2023-08-30 00:17:20,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:17:20,380 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:20,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:17:20,380 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:17:20,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-08-30 00:17:20,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:17:20,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:17:20,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 00:17:20,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:17:20,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-08-30 00:17:20,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 00:17:21,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:17:21,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 00:17:21,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 00:17:22,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:17:22,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:17:22,257 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:17:22,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017819333] [2023-08-30 00:17:22,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017819333] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:17:22,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:17:22,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 00:17:22,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772873479] [2023-08-30 00:17:22,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:17:22,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 00:17:22,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:17:22,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 00:17:22,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-08-30 00:17:24,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:17:26,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:17:28,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:17:30,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:17:33,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:17:36,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 456 [2023-08-30 00:17:36,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 164 transitions, 1809 flow. Second operand has 11 states, 11 states have (on average 157.0) internal successors, (1727), 11 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:36,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:17:36,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 456 [2023-08-30 00:17:36,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:17:40,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:17:48,392 INFO L130 PetriNetUnfolder]: 28143/47076 cut-off events. [2023-08-30 00:17:48,392 INFO L131 PetriNetUnfolder]: For 83042/83042 co-relation queries the response was YES. [2023-08-30 00:17:48,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169990 conditions, 47076 events. 28143/47076 cut-off events. For 83042/83042 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 364358 event pairs, 6828 based on Foata normal form. 99/36384 useless extension candidates. Maximal degree in co-relation 169904. Up to 36631 conditions per place. [2023-08-30 00:17:48,838 INFO L137 encePairwiseOnDemand]: 445/456 looper letters, 138 selfloop transitions, 31 changer transitions 26/197 dead transitions. [2023-08-30 00:17:48,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 197 transitions, 2318 flow [2023-08-30 00:17:48,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:17:48,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:17:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1307 transitions. [2023-08-30 00:17:48,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35827850877192985 [2023-08-30 00:17:48,841 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1307 transitions. [2023-08-30 00:17:48,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1307 transitions. [2023-08-30 00:17:48,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:17:48,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1307 transitions. [2023-08-30 00:17:48,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 163.375) internal successors, (1307), 8 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:48,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 456.0) internal successors, (4104), 9 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:48,845 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 456.0) internal successors, (4104), 9 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:48,845 INFO L175 Difference]: Start difference. First operand has 206 places, 164 transitions, 1809 flow. Second operand 8 states and 1307 transitions. [2023-08-30 00:17:48,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 197 transitions, 2318 flow [2023-08-30 00:17:49,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 197 transitions, 2300 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-30 00:17:49,713 INFO L231 Difference]: Finished difference. Result has 205 places, 163 transitions, 1869 flow [2023-08-30 00:17:49,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=1793, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1869, PETRI_PLACES=205, PETRI_TRANSITIONS=163} [2023-08-30 00:17:49,713 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 146 predicate places. [2023-08-30 00:17:49,714 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 163 transitions, 1869 flow [2023-08-30 00:17:49,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 157.0) internal successors, (1727), 11 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:49,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:17:49,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:17:49,724 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 (29)] Ended with exit code 0 [2023-08-30 00:17:49,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:49,921 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:17:49,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:17:49,921 INFO L85 PathProgramCache]: Analyzing trace with hash -979079234, now seen corresponding path program 5 times [2023-08-30 00:17:49,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:17:49,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [120905502] [2023-08-30 00:17:49,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:17:49,922 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:49,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:17:49,923 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:17:49,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-08-30 00:17:50,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:17:50,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:17:50,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 00:17:50,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:17:50,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:17:50,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 00:17:51,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:17:51,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:17:51,529 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 00:17:51,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 90 [2023-08-30 00:17:53,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:17:53,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:17:53,927 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:17:53,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [120905502] [2023-08-30 00:17:53,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [120905502] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:17:53,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:17:53,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 00:17:53,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531852870] [2023-08-30 00:17:53,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:17:53,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 00:17:53,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:17:53,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 00:17:53,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=89, Unknown=1, NotChecked=0, Total=110 [2023-08-30 00:17:56,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:17:59,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:01,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:03,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:05,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:07,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:09,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:11,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:14,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:16,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:19,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:21,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:23,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:25,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:28,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:30,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:32,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:34,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:36,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:38,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:40,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:42,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:44,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:47,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:49,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:51,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:53,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:55,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:57,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:18:59,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:19:01,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:19:03,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:19:03,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 456 [2023-08-30 00:19:03,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 163 transitions, 1869 flow. Second operand has 11 states, 11 states have (on average 132.0) internal successors, (1452), 11 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:03,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:19:03,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 456 [2023-08-30 00:19:03,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:19:07,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:19:10,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:19:12,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:19:14,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:19:16,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:19:23,858 INFO L130 PetriNetUnfolder]: 26559/42621 cut-off events. [2023-08-30 00:19:23,858 INFO L131 PetriNetUnfolder]: For 100023/100023 co-relation queries the response was YES. [2023-08-30 00:19:24,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162853 conditions, 42621 events. 26559/42621 cut-off events. For 100023/100023 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 305296 event pairs, 6729 based on Foata normal form. 99/31830 useless extension candidates. Maximal degree in co-relation 162766. Up to 35245 conditions per place. [2023-08-30 00:19:24,266 INFO L137 encePairwiseOnDemand]: 447/456 looper letters, 160 selfloop transitions, 2 changer transitions 24/188 dead transitions. [2023-08-30 00:19:24,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 188 transitions, 2318 flow [2023-08-30 00:19:24,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:19:24,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:19:24,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1100 transitions. [2023-08-30 00:19:24,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30153508771929827 [2023-08-30 00:19:24,270 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1100 transitions. [2023-08-30 00:19:24,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1100 transitions. [2023-08-30 00:19:24,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:19:24,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1100 transitions. [2023-08-30 00:19:24,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 137.5) internal successors, (1100), 8 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:24,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 456.0) internal successors, (4104), 9 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:24,274 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 456.0) internal successors, (4104), 9 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:24,274 INFO L175 Difference]: Start difference. First operand has 205 places, 163 transitions, 1869 flow. Second operand 8 states and 1100 transitions. [2023-08-30 00:19:24,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 188 transitions, 2318 flow [2023-08-30 00:19:25,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 188 transitions, 2218 flow, removed 15 selfloop flow, removed 12 redundant places. [2023-08-30 00:19:25,384 INFO L231 Difference]: Finished difference. Result has 201 places, 158 transitions, 1751 flow [2023-08-30 00:19:25,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=1775, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1751, PETRI_PLACES=201, PETRI_TRANSITIONS=158} [2023-08-30 00:19:25,385 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 142 predicate places. [2023-08-30 00:19:25,385 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 158 transitions, 1751 flow [2023-08-30 00:19:25,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 132.0) internal successors, (1452), 11 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:25,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:19:25,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:19:25,395 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 (30)] Ended with exit code 0 [2023-08-30 00:19:25,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:19:25,588 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:19:25,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:19:25,588 INFO L85 PathProgramCache]: Analyzing trace with hash 958512636, now seen corresponding path program 1 times [2023-08-30 00:19:25,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:19:25,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361155553] [2023-08-30 00:19:25,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:19:25,588 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:19:25,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:19:25,589 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:19:25,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-08-30 00:19:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:19:25,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:19:25,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:19:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:19:25,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:19:26,040 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2023-08-30 00:19:26,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 28 [2023-08-30 00:19:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:19:26,118 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:19:26,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361155553] [2023-08-30 00:19:26,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1361155553] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:19:26,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:19:26,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-30 00:19:26,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350291669] [2023-08-30 00:19:26,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:19:26,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:19:26,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:19:26,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:19:26,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:19:26,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 456 [2023-08-30 00:19:26,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 158 transitions, 1751 flow. Second operand has 8 states, 8 states have (on average 179.875) internal successors, (1439), 8 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:26,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:19:26,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 456 [2023-08-30 00:19:26,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:19:35,366 INFO L130 PetriNetUnfolder]: 35469/53907 cut-off events. [2023-08-30 00:19:35,366 INFO L131 PetriNetUnfolder]: For 63440/63440 co-relation queries the response was YES. [2023-08-30 00:19:35,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183550 conditions, 53907 events. 35469/53907 cut-off events. For 63440/63440 co-relation queries the response was YES. Maximal size of possible extension queue 768. Compared 365170 event pairs, 2769 based on Foata normal form. 0/39750 useless extension candidates. Maximal degree in co-relation 183467. Up to 27919 conditions per place. [2023-08-30 00:19:35,929 INFO L137 encePairwiseOnDemand]: 449/456 looper letters, 184 selfloop transitions, 9 changer transitions 0/195 dead transitions. [2023-08-30 00:19:35,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 195 transitions, 2296 flow [2023-08-30 00:19:35,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:19:35,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:19:35,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1116 transitions. [2023-08-30 00:19:35,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40789473684210525 [2023-08-30 00:19:35,932 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1116 transitions. [2023-08-30 00:19:35,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1116 transitions. [2023-08-30 00:19:35,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:19:35,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1116 transitions. [2023-08-30 00:19:35,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 186.0) internal successors, (1116), 6 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:35,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 456.0) internal successors, (3192), 7 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:35,936 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 456.0) internal successors, (3192), 7 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:35,936 INFO L175 Difference]: Start difference. First operand has 201 places, 158 transitions, 1751 flow. Second operand 6 states and 1116 transitions. [2023-08-30 00:19:35,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 195 transitions, 2296 flow [2023-08-30 00:19:36,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 195 transitions, 2256 flow, removed 18 selfloop flow, removed 6 redundant places. [2023-08-30 00:19:36,789 INFO L231 Difference]: Finished difference. Result has 194 places, 164 transitions, 1808 flow [2023-08-30 00:19:36,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=1735, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1808, PETRI_PLACES=194, PETRI_TRANSITIONS=164} [2023-08-30 00:19:36,792 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 135 predicate places. [2023-08-30 00:19:36,793 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 164 transitions, 1808 flow [2023-08-30 00:19:36,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 179.875) internal successors, (1439), 8 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:36,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:19:36,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:19:36,803 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 (31)] Ended with exit code 0 [2023-08-30 00:19:36,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:19:36,995 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:19:36,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:19:36,995 INFO L85 PathProgramCache]: Analyzing trace with hash -211814354, now seen corresponding path program 2 times [2023-08-30 00:19:36,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:19:36,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1376121113] [2023-08-30 00:19:36,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:19:36,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:19:36,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:19:36,997 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:19:36,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-08-30 00:19:37,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:19:37,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:19:37,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 00:19:37,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:19:37,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 126 [2023-08-30 00:19:37,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2023-08-30 00:19:37,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 83 [2023-08-30 00:19:38,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:19:38,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:19:39,383 WARN L839 $PredicateComparison]: unable to prove that (forall ((~q2~0.offset (_ BitVec 32)) (v_ArrVal_1252 (Array (_ BitVec 32) (_ BitVec 8))) (~q2~0.base (_ BitVec 32))) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1252))) (let ((.cse1 (select .cse7 ~q2~0.base))) (let ((.cse3 (let ((.cse5 (select .cse7 c_~q1~0.base)) (.cse6 (bvmul (_ bv4 32) c_~q1_front~0))) (concat (concat (concat (select .cse5 (bvadd (_ bv3 32) .cse6 c_~q1~0.offset)) (select .cse5 (bvadd (_ bv2 32) .cse6 c_~q1~0.offset))) (select .cse5 (bvadd .cse6 c_~q1~0.offset (_ bv1 32)))) (select .cse5 (bvadd .cse6 c_~q1~0.offset))))) (.cse0 (let ((.cse4 (bvmul (_ bv4 32) c_~q2_front~0))) (concat (concat (concat (select .cse1 (bvadd .cse4 (_ bv3 32) ~q2~0.offset)) (select .cse1 (bvadd .cse4 (_ bv2 32) ~q2~0.offset))) (select .cse1 (bvadd .cse4 (_ bv1 32) ~q2~0.offset))) (select .cse1 (bvadd .cse4 ~q2~0.offset)))))) (or (not (bvsle .cse0 (_ bv0 32))) (not (= (bvadd (_ bv1 32) (let ((.cse2 (bvmul (_ bv4 32) c_~q2_back~0))) (concat (concat (concat (select .cse1 (bvadd .cse2 (_ bv3 32) ~q2~0.offset)) (select .cse1 (bvadd .cse2 (_ bv2 32) ~q2~0.offset))) (select .cse1 (bvadd .cse2 (_ bv1 32) ~q2~0.offset))) (select .cse1 (bvadd .cse2 ~q2~0.offset))))) .cse3)) (not (bvsle .cse3 (_ bv0 32))) (= (bvadd c_~s~0 .cse3) (bvadd (_ bv2 32) (bvmul .cse0 (_ bv2 32)) (bvmul c_~t~0 (_ bv2 32))))))))) is different from false [2023-08-30 00:19:39,497 WARN L839 $PredicateComparison]: unable to prove that (or (forall ((~q1_back~0 (_ BitVec 32))) (not (= (let ((.cse0 (select |c_#memory_int| c_~q1~0.base)) (.cse1 (bvmul (_ bv4 32) ~q1_back~0))) (concat (concat (concat (select .cse0 (bvadd .cse1 (_ bv3 32) c_~q1~0.offset)) (select .cse0 (bvadd .cse1 (_ bv2 32) c_~q1~0.offset))) (select .cse0 (bvadd .cse1 c_~q1~0.offset (_ bv1 32)))) (select .cse0 (bvadd .cse1 c_~q1~0.offset)))) (_ bv0 32)))) (forall ((~q2~0.offset (_ BitVec 32)) (v_ArrVal_1252 (Array (_ BitVec 32) (_ BitVec 8))) (~q2~0.base (_ BitVec 32))) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1252))) (let ((.cse3 (select .cse9 ~q2~0.base))) (let ((.cse5 (let ((.cse7 (select .cse9 c_~q1~0.base)) (.cse8 (bvmul (_ bv4 32) c_~q1_front~0))) (concat (concat (concat (select .cse7 (bvadd (_ bv3 32) .cse8 c_~q1~0.offset)) (select .cse7 (bvadd (_ bv2 32) .cse8 c_~q1~0.offset))) (select .cse7 (bvadd .cse8 c_~q1~0.offset (_ bv1 32)))) (select .cse7 (bvadd .cse8 c_~q1~0.offset))))) (.cse2 (let ((.cse6 (bvmul (_ bv4 32) c_~q2_front~0))) (concat (concat (concat (select .cse3 (bvadd .cse6 (_ bv3 32) ~q2~0.offset)) (select .cse3 (bvadd .cse6 (_ bv2 32) ~q2~0.offset))) (select .cse3 (bvadd .cse6 (_ bv1 32) ~q2~0.offset))) (select .cse3 (bvadd .cse6 ~q2~0.offset)))))) (or (not (bvsle .cse2 (_ bv0 32))) (not (= (bvadd (_ bv1 32) (let ((.cse4 (bvmul (_ bv4 32) c_~q2_back~0))) (concat (concat (concat (select .cse3 (bvadd .cse4 (_ bv3 32) ~q2~0.offset)) (select .cse3 (bvadd .cse4 (_ bv2 32) ~q2~0.offset))) (select .cse3 (bvadd .cse4 (_ bv1 32) ~q2~0.offset))) (select .cse3 (bvadd .cse4 ~q2~0.offset))))) .cse5)) (not (bvsle .cse5 (_ bv0 32))) (= (bvadd c_~s~0 .cse5) (bvadd (_ bv2 32) (bvmul .cse2 (_ bv2 32)) (bvmul c_~t~0 (_ bv2 32)))))))))) is different from false [2023-08-30 00:20:49,152 WARN L222 SmtUtils]: Spent 1.15m on a formula simplification. DAG size of input: 625 DAG size of output: 431 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-08-30 00:20:49,156 INFO L321 Elim1Store]: treesize reduction 733, result has 73.5 percent of original size [2023-08-30 00:20:49,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 0 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 190 case distinctions, treesize of input 6428 treesize of output 7160 [2023-08-30 00:20:49,658 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:49,678 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:49,679 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:49,764 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:49,773 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:49,774 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:49,896 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:49,951 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:49,952 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:49,962 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:49,963 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:49,963 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:49,963 INFO L217 Elim1Store]: Index analysis took 338 ms [2023-08-30 00:20:51,820 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 00:20:51,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 30 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 36 case distinctions, treesize of input 2570 treesize of output 2182 [2023-08-30 00:20:52,117 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,216 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,228 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,289 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,300 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,300 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,301 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,331 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,342 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,343 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,365 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,438 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,555 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,582 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,600 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,601 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,601 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,630 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,640 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,665 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,665 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,666 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,666 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,718 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,791 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,792 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,813 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,814 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,814 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,815 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,864 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,865 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,865 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,866 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,867 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,916 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,961 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,973 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,974 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:52,985 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:53,067 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:53,092 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:53,125 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:53,136 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:53,168 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:53,222 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:53,232 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:53,261 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 00:20:53,289 INFO L217 Elim1Store]: Index analysis took 1181 ms Killed by 15