./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 BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/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 BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:59:03,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:59:03,936 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:59:03,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:59:03,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:59:03,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:59:03,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:59:03,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:59:03,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:59:03,993 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:59:03,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:59:03,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:59:03,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:59:03,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:59:04,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:59:04,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:59:04,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:59:04,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:59:04,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:59:04,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:59:04,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:59:04,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:59:04,022 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:59:04,023 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:59:04,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:59:04,031 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:59:04,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:59:04,032 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:59:04,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:59:04,034 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:59:04,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:59:04,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:59:04,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:59:04,037 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:59:04,038 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:59:04,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:59:04,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:59:04,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:59:04,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:59:04,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:59:04,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:59:04,042 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 02:59:04,074 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:59:04,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:59:04,075 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:59:04,075 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:59:04,076 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:59:04,076 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:59:04,077 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:59:04,077 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:59:04,077 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:59:04,077 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:59:04,078 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:59:04,078 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:59:04,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:59:04,079 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:59:04,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:59:04,079 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:59:04,079 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:59:04,079 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:59:04,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:59:04,080 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:59:04,080 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:59:04,080 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:59:04,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:59:04,080 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:59:04,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:59:04,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:59:04,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:59:04,081 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:59:04,081 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 02:59:04,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 02:59:04,082 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:59:04,082 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:59:04,082 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:59:04,082 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:59:04,082 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:59:04,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:59:04,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:59:04,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:59:04,372 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:59:04,372 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:59:04,373 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2023-09-01 02:59:05,493 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:59:05,712 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:59:05,713 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2023-09-01 02:59:05,718 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cad4b7004/eea074ce9b9f40d5a334bde4553a7847/FLAGf90191e89 [2023-09-01 02:59:05,732 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cad4b7004/eea074ce9b9f40d5a334bde4553a7847 [2023-09-01 02:59:05,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:59:05,740 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:59:05,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:59:05,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:59:05,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:59:05,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:59:05" (1/1) ... [2023-09-01 02:59:05,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6643170b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:05, skipping insertion in model container [2023-09-01 02:59:05,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:59:05" (1/1) ... [2023-09-01 02:59:05,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:59:05,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:59:05,917 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] [2023-09-01 02:59:05,925 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:59:05,934 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 02:59:05,935 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3ea2d2b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:05, skipping insertion in model container [2023-09-01 02:59:05,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:59:05,936 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 02:59:05,937 INFO L158 Benchmark]: Toolchain (without parser) took 196.34ms. Allocated memory is still 62.9MB. Free memory was 40.6MB in the beginning and 30.5MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 02:59:05,938 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 62.9MB. Free memory is still 40.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 02:59:05,938 INFO L158 Benchmark]: CACSL2BoogieTranslator took 192.91ms. Allocated memory is still 62.9MB. Free memory was 40.2MB in the beginning and 30.5MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 02:59:05,939 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 62.9MB. Free memory is still 40.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 192.91ms. Allocated memory is still 62.9MB. Free memory was 40.2MB in the beginning and 30.5MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. 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 BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:59:07,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:59:07,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:59:07,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:59:07,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:59:07,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:59:07,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:59:07,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:59:07,590 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:59:07,595 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:59:07,596 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:59:07,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:59:07,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:59:07,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:59:07,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:59:07,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:59:07,610 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:59:07,611 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:59:07,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:59:07,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:59:07,619 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:59:07,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:59:07,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:59:07,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:59:07,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:59:07,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:59:07,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:59:07,640 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:59:07,641 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:59:07,642 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:59:07,642 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:59:07,643 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:59:07,645 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:59:07,645 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:59:07,646 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:59:07,646 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:59:07,647 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:59:07,647 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:59:07,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:59:07,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:59:07,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:59:07,650 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 02:59:07,682 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:59:07,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:59:07,684 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:59:07,684 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:59:07,685 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:59:07,685 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:59:07,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:59:07,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:59:07,686 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:59:07,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:59:07,687 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:59:07,687 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:59:07,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:59:07,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:59:07,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:59:07,688 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:59:07,688 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:59:07,688 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:59:07,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:59:07,688 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:59:07,689 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 02:59:07,689 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 02:59:07,689 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:59:07,689 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:59:07,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:59:07,690 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:59:07,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:59:07,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:59:07,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:59:07,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:59:07,691 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 02:59:07,691 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 02:59:07,691 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:59:07,691 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:59:07,692 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:59:07,692 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 02:59:07,692 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:59:07,692 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:59:07,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:59:08,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:59:08,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:59:08,016 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:59:08,017 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:59:08,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2023-09-01 02:59:09,159 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:59:09,355 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:59:09,355 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2023-09-01 02:59:09,361 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74178b80e/c2af838302ef461c91b45da817e0ffd6/FLAG340ae479e [2023-09-01 02:59:09,379 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74178b80e/c2af838302ef461c91b45da817e0ffd6 [2023-09-01 02:59:09,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:59:09,383 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:59:09,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:59:09,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:59:09,388 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:59:09,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:59:09" (1/1) ... [2023-09-01 02:59:09,390 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b415fde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09, skipping insertion in model container [2023-09-01 02:59:09,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:59:09" (1/1) ... [2023-09-01 02:59:09,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:59:09,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:59:09,632 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] [2023-09-01 02:59:09,651 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:59:09,668 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 02:59:09,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:59:09,705 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] [2023-09-01 02:59:09,709 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:59:09,717 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 02:59:09,751 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] [2023-09-01 02:59:09,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:59:09,771 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:59:09,771 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:59:09,777 INFO L208 MainTranslator]: Completed translation [2023-09-01 02:59:09,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09 WrapperNode [2023-09-01 02:59:09,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:59:09,779 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 02:59:09,779 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 02:59:09,780 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 02:59:09,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09" (1/1) ... [2023-09-01 02:59:09,808 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09" (1/1) ... [2023-09-01 02:59:09,836 INFO L138 Inliner]: procedures = 27, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 245 [2023-09-01 02:59:09,837 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 02:59:09,838 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 02:59:09,838 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 02:59:09,839 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 02:59:09,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09" (1/1) ... [2023-09-01 02:59:09,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09" (1/1) ... [2023-09-01 02:59:09,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09" (1/1) ... [2023-09-01 02:59:09,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09" (1/1) ... [2023-09-01 02:59:09,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09" (1/1) ... [2023-09-01 02:59:09,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09" (1/1) ... [2023-09-01 02:59:09,891 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09" (1/1) ... [2023-09-01 02:59:09,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09" (1/1) ... [2023-09-01 02:59:09,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 02:59:09,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 02:59:09,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 02:59:09,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 02:59:09,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09" (1/1) ... [2023-09-01 02:59:09,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:59:09,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:59:09,934 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 02:59:09,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 02:59:09,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 02:59:09,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 02:59:09,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 02:59:09,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 02:59:09,969 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 02:59:09,969 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 02:59:09,969 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 02:59:09,969 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 02:59:09,969 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 02:59:09,969 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 02:59:09,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 02:59:09,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 02:59:09,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 02:59:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 02:59:09,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 02:59:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 02:59:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 02:59:09,971 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 02:59:10,073 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 02:59:10,074 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 02:59:10,774 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 02:59:10,945 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 02:59:10,945 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-09-01 02:59:10,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:59:10 BoogieIcfgContainer [2023-09-01 02:59:10,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 02:59:10,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 02:59:10,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 02:59:10,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 02:59:10,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:59:09" (1/3) ... [2023-09-01 02:59:10,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567bf3bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:59:10, skipping insertion in model container [2023-09-01 02:59:10,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09" (2/3) ... [2023-09-01 02:59:10,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567bf3bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:59:10, skipping insertion in model container [2023-09-01 02:59:10,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:59:10" (3/3) ... [2023-09-01 02:59:10,956 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2023-09-01 02:59:10,971 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 02:59:10,972 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-09-01 02:59:10,972 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 02:59:11,060 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 02:59:11,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 216 places, 224 transitions, 472 flow [2023-09-01 02:59:11,203 INFO L130 PetriNetUnfolder]: 18/221 cut-off events. [2023-09-01 02:59:11,204 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 02:59:11,209 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. [2023-09-01 02:59:11,210 INFO L82 GeneralOperation]: Start removeDead. Operand has 216 places, 224 transitions, 472 flow [2023-09-01 02:59:11,220 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 217 transitions, 452 flow [2023-09-01 02:59:11,224 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 02:59:11,236 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 217 transitions, 452 flow [2023-09-01 02:59:11,239 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 217 transitions, 452 flow [2023-09-01 02:59:11,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 217 transitions, 452 flow [2023-09-01 02:59:11,296 INFO L130 PetriNetUnfolder]: 18/217 cut-off events. [2023-09-01 02:59:11,297 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 02:59:11,299 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. [2023-09-01 02:59:11,301 INFO L119 LiptonReduction]: Number of co-enabled transitions 2700 [2023-09-01 02:59:35,037 INFO L134 LiptonReduction]: Checked pairs total: 4465 [2023-09-01 02:59:35,038 INFO L136 LiptonReduction]: Total number of compositions: 232 [2023-09-01 02:59:35,054 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 02:59:35,059 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;@328418c2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 02:59:35,059 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2023-09-01 02:59:35,062 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 02:59:35,063 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:59:35,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:59:35,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:59:35,064 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 02:59:35,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:59:35,068 INFO L85 PathProgramCache]: Analyzing trace with hash 32721, now seen corresponding path program 1 times [2023-09-01 02:59:35,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:59:35,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093328278] [2023-09-01 02:59:35,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:59:35,088 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:59:35,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:59:35,091 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:59:35,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 02:59:35,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:59:35,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 02:59:35,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:59:35,422 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 02:59:35,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 02:59:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:35,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:59:35,451 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:59:35,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093328278] [2023-09-01 02:59:35,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093328278] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:59:35,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:59:35,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:59:35,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546349539] [2023-09-01 02:59:35,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:59:35,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:59:35,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:59:35,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:59:35,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:59:35,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 456 [2023-09-01 02:59:35,617 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) [2023-09-01 02:59:35,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:59:35,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 456 [2023-09-01 02:59:35,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:59:36,972 INFO L130 PetriNetUnfolder]: 5982/7543 cut-off events. [2023-09-01 02:59:36,973 INFO L131 PetriNetUnfolder]: For 93/93 co-relation queries the response was YES. [2023-09-01 02:59:36,984 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. [2023-09-01 02:59:37,035 INFO L137 encePairwiseOnDemand]: 451/456 looper letters, 47 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-09-01 02:59:37,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 51 transitions, 216 flow [2023-09-01 02:59:37,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:59:37,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:59:37,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 586 transitions. [2023-09-01 02:59:37,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4283625730994152 [2023-09-01 02:59:37,055 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 586 transitions. [2023-09-01 02:59:37,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 586 transitions. [2023-09-01 02:59:37,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:59:37,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 586 transitions. [2023-09-01 02:59:37,068 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) [2023-09-01 02:59:37,085 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) [2023-09-01 02:59:37,086 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) [2023-09-01 02:59:37,087 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 128 flow. Second operand 3 states and 586 transitions. [2023-09-01 02:59:37,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 51 transitions, 216 flow [2023-09-01 02:59:37,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 02:59:37,098 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 110 flow [2023-09-01 02:59:37,100 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} [2023-09-01 02:59:37,103 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -7 predicate places. [2023-09-01 02:59:37,103 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 110 flow [2023-09-01 02:59:37,104 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) [2023-09-01 02:59:37,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:59:37,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:59:37,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 02:59:37,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:59:37,314 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 02:59:37,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:59:37,316 INFO L85 PathProgramCache]: Analyzing trace with hash 32722, now seen corresponding path program 1 times [2023-09-01 02:59:37,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:59:37,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465628312] [2023-09-01 02:59:37,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:59:37,317 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:59:37,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:59:37,318 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:59:37,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 02:59:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:59:37,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:59:37,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:59:37,508 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:59:37,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:59:37,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:37,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:59:37,537 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:59:37,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465628312] [2023-09-01 02:59:37,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465628312] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:59:37,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:59:37,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:59:37,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709579656] [2023-09-01 02:59:37,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:59:37,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:59:37,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:59:37,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:59:37,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:59:37,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 456 [2023-09-01 02:59:37,704 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) [2023-09-01 02:59:37,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:59:37,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 456 [2023-09-01 02:59:37,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:59:39,701 INFO L130 PetriNetUnfolder]: 11950/15070 cut-off events. [2023-09-01 02:59:39,702 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-09-01 02:59:39,712 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. [2023-09-01 02:59:39,789 INFO L137 encePairwiseOnDemand]: 450/456 looper letters, 89 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2023-09-01 02:59:39,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 96 transitions, 392 flow [2023-09-01 02:59:39,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:59:39,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:59:39,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 629 transitions. [2023-09-01 02:59:39,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4597953216374269 [2023-09-01 02:59:39,793 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 629 transitions. [2023-09-01 02:59:39,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 629 transitions. [2023-09-01 02:59:39,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:59:39,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 629 transitions. [2023-09-01 02:59:39,796 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) [2023-09-01 02:59:39,799 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) [2023-09-01 02:59:39,800 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) [2023-09-01 02:59:39,800 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 110 flow. Second operand 3 states and 629 transitions. [2023-09-01 02:59:39,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 96 transitions, 392 flow [2023-09-01 02:59:39,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 96 transitions, 391 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:59:39,803 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 141 flow [2023-09-01 02:59:39,803 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} [2023-09-01 02:59:39,804 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -4 predicate places. [2023-09-01 02:59:39,804 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 141 flow [2023-09-01 02:59:39,804 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) [2023-09-01 02:59:39,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:59:39,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:59:39,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-09-01 02:59:40,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:59:40,015 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 02:59:40,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:59:40,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1017668, now seen corresponding path program 1 times [2023-09-01 02:59:40,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:59:40,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2026867232] [2023-09-01 02:59:40,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:59:40,017 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:59:40,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:59:40,018 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:59:40,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 02:59:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:59:40,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 02:59:40,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:59:40,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:59:40,185 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-09-01 02:59:40,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-09-01 02:59:40,267 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 02:59:40,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 02:59:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:40,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:59:40,283 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:59:40,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2026867232] [2023-09-01 02:59:40,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2026867232] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:59:40,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:59:40,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:59:40,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545162776] [2023-09-01 02:59:40,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:59:40,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:59:40,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:59:40,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:59:40,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:59:40,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 456 [2023-09-01 02:59:40,424 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) [2023-09-01 02:59:40,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:59:40,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 456 [2023-09-01 02:59:40,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:59:41,974 INFO L130 PetriNetUnfolder]: 9351/11909 cut-off events. [2023-09-01 02:59:41,974 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2023-09-01 02:59:41,982 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. [2023-09-01 02:59:42,030 INFO L137 encePairwiseOnDemand]: 453/456 looper letters, 48 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-09-01 02:59:42,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 52 transitions, 235 flow [2023-09-01 02:59:42,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:59:42,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:59:42,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 591 transitions. [2023-09-01 02:59:42,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43201754385964913 [2023-09-01 02:59:42,033 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 591 transitions. [2023-09-01 02:59:42,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 591 transitions. [2023-09-01 02:59:42,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:59:42,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 591 transitions. [2023-09-01 02:59:42,036 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) [2023-09-01 02:59:42,038 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) [2023-09-01 02:59:42,039 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) [2023-09-01 02:59:42,039 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 141 flow. Second operand 3 states and 591 transitions. [2023-09-01 02:59:42,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 52 transitions, 235 flow [2023-09-01 02:59:42,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 227 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:59:42,041 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 131 flow [2023-09-01 02:59:42,041 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} [2023-09-01 02:59:42,043 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -6 predicate places. [2023-09-01 02:59:42,043 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 131 flow [2023-09-01 02:59:42,043 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) [2023-09-01 02:59:42,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:59:42,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:59:42,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-09-01 02:59:42,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:59:42,257 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 02:59:42,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:59:42,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1016569, now seen corresponding path program 1 times [2023-09-01 02:59:42,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:59:42,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380464390] [2023-09-01 02:59:42,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:59:42,259 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:59:42,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:59:42,261 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:59:42,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 02:59:42,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:59:42,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 02:59:42,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:59:42,427 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:59:42,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:59:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:42,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:59:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:42,641 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:59:42,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380464390] [2023-09-01 02:59:42,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [380464390] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:59:42,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:59:42,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 02:59:42,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167589310] [2023-09-01 02:59:42,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:59:42,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:59:42,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:59:42,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:59:42,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:59:43,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 456 [2023-09-01 02:59:43,360 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) [2023-09-01 02:59:43,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:59:43,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 456 [2023-09-01 02:59:43,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:59:46,041 INFO L130 PetriNetUnfolder]: 14006/17846 cut-off events. [2023-09-01 02:59:46,041 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2023-09-01 02:59:46,058 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. [2023-09-01 02:59:46,145 INFO L137 encePairwiseOnDemand]: 448/456 looper letters, 125 selfloop transitions, 17 changer transitions 0/145 dead transitions. [2023-09-01 02:59:46,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 145 transitions, 631 flow [2023-09-01 02:59:46,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:59:46,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:59:46,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1156 transitions. [2023-09-01 02:59:46,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42251461988304095 [2023-09-01 02:59:46,150 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1156 transitions. [2023-09-01 02:59:46,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1156 transitions. [2023-09-01 02:59:46,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:59:46,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1156 transitions. [2023-09-01 02:59:46,154 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) [2023-09-01 02:59:46,158 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) [2023-09-01 02:59:46,159 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) [2023-09-01 02:59:46,160 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 131 flow. Second operand 6 states and 1156 transitions. [2023-09-01 02:59:46,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 145 transitions, 631 flow [2023-09-01 02:59:46,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 145 transitions, 630 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:59:46,166 INFO L231 Difference]: Finished difference. Result has 61 places, 65 transitions, 259 flow [2023-09-01 02:59:46,166 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} [2023-09-01 02:59:46,167 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-09-01 02:59:46,168 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 65 transitions, 259 flow [2023-09-01 02:59:46,168 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) [2023-09-01 02:59:46,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:59:46,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:59:46,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 02:59:46,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:59:46,378 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 02:59:46,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:59:46,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1017667, now seen corresponding path program 1 times [2023-09-01 02:59:46,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:59:46,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012472560] [2023-09-01 02:59:46,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:59:46,379 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:59:46,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:59:46,381 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:59:46,381 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 (6)] Waiting until timeout for monitored process [2023-09-01 02:59:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:59:46,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 02:59:46,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:59:46,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:59:46,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:59:46,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:59:46,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:59:46,546 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-09-01 02:59:46,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-09-01 02:59:46,570 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 02:59:46,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-09-01 02:59:46,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:59:46,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:59:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:46,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:59:46,646 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:59:46,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012472560] [2023-09-01 02:59:46,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012472560] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:59:46,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:59:46,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:59:46,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220342239] [2023-09-01 02:59:46,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:59:46,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:59:46,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:59:46,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:59:46,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:59:46,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 456 [2023-09-01 02:59:46,834 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) [2023-09-01 02:59:46,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:59:46,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 456 [2023-09-01 02:59:46,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:59:48,117 INFO L130 PetriNetUnfolder]: 10112/13109 cut-off events. [2023-09-01 02:59:48,118 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-09-01 02:59:48,148 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. [2023-09-01 02:59:48,201 INFO L137 encePairwiseOnDemand]: 453/456 looper letters, 57 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2023-09-01 02:59:48,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 61 transitions, 355 flow [2023-09-01 02:59:48,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:59:48,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:59:48,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 592 transitions. [2023-09-01 02:59:48,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4327485380116959 [2023-09-01 02:59:48,204 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 592 transitions. [2023-09-01 02:59:48,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 592 transitions. [2023-09-01 02:59:48,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:59:48,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 592 transitions. [2023-09-01 02:59:48,206 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) [2023-09-01 02:59:48,208 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) [2023-09-01 02:59:48,209 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) [2023-09-01 02:59:48,209 INFO L175 Difference]: Start difference. First operand has 61 places, 65 transitions, 259 flow. Second operand 3 states and 592 transitions. [2023-09-01 02:59:48,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 61 transitions, 355 flow [2023-09-01 02:59:48,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 61 transitions, 336 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 02:59:48,214 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 222 flow [2023-09-01 02:59:48,215 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} [2023-09-01 02:59:48,218 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2023-09-01 02:59:48,218 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 222 flow [2023-09-01 02:59:48,219 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) [2023-09-01 02:59:48,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:59:48,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:59:48,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 02:59:48,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:59:48,434 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 02:59:48,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:59:48,435 INFO L85 PathProgramCache]: Analyzing trace with hash 978004356, now seen corresponding path program 1 times [2023-09-01 02:59:48,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:59:48,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703951371] [2023-09-01 02:59:48,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:59:48,435 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:59:48,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:59:48,436 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:59:48,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 02:59:48,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:59:48,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 02:59:48,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:59:48,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:59:48,589 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-09-01 02:59:48,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-09-01 02:59:48,734 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 02:59:48,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 02:59:48,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:48,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:59:48,771 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:59:48,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703951371] [2023-09-01 02:59:48,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703951371] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:59:48,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:59:48,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:59:48,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186059169] [2023-09-01 02:59:48,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:59:48,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:59:48,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:59:48,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:59:48,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:59:48,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 456 [2023-09-01 02:59:48,903 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) [2023-09-01 02:59:48,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:59:48,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 456 [2023-09-01 02:59:48,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:59:49,965 INFO L130 PetriNetUnfolder]: 9707/12563 cut-off events. [2023-09-01 02:59:49,965 INFO L131 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2023-09-01 02:59:49,989 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. [2023-09-01 02:59:50,033 INFO L137 encePairwiseOnDemand]: 453/456 looper letters, 55 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-09-01 02:59:50,033 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 330 flow [2023-09-01 02:59:50,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:59:50,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:59:50,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 587 transitions. [2023-09-01 02:59:50,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42909356725146197 [2023-09-01 02:59:50,036 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 587 transitions. [2023-09-01 02:59:50,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 587 transitions. [2023-09-01 02:59:50,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:59:50,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 587 transitions. [2023-09-01 02:59:50,038 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) [2023-09-01 02:59:50,040 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) [2023-09-01 02:59:50,041 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) [2023-09-01 02:59:50,041 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 222 flow. Second operand 3 states and 587 transitions. [2023-09-01 02:59:50,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 330 flow [2023-09-01 02:59:50,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 59 transitions, 329 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:59:50,043 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 219 flow [2023-09-01 02:59:50,043 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} [2023-09-01 02:59:50,046 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 0 predicate places. [2023-09-01 02:59:50,046 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 219 flow [2023-09-01 02:59:50,046 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) [2023-09-01 02:59:50,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:59:50,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:59:50,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 02:59:50,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:59:50,256 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 02:59:50,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:59:50,257 INFO L85 PathProgramCache]: Analyzing trace with hash 978004355, now seen corresponding path program 1 times [2023-09-01 02:59:50,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:59:50,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446839307] [2023-09-01 02:59:50,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:59:50,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:59:50,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:59:50,258 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:59:50,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 02:59:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:59:50,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 02:59:50,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:59:50,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:59:50,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:59:50,433 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-09-01 02:59:50,434 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 [2023-09-01 02:59:50,447 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 [2023-09-01 02:59:50,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:59:50,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:59:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:50,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:59:50,559 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:59:50,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446839307] [2023-09-01 02:59:50,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446839307] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:59:50,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:59:50,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:59:50,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028377416] [2023-09-01 02:59:50,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:59:50,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:59:50,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:59:50,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:59:50,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:59:50,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 456 [2023-09-01 02:59:50,764 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) [2023-09-01 02:59:50,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:59:50,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 456 [2023-09-01 02:59:50,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:59:51,759 INFO L130 PetriNetUnfolder]: 9302/12017 cut-off events. [2023-09-01 02:59:51,759 INFO L131 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2023-09-01 02:59:51,774 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. [2023-09-01 02:59:51,807 INFO L137 encePairwiseOnDemand]: 453/456 looper letters, 53 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-09-01 02:59:51,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 57 transitions, 323 flow [2023-09-01 02:59:51,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:59:51,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:59:51,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 588 transitions. [2023-09-01 02:59:51,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298245614035088 [2023-09-01 02:59:51,810 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 588 transitions. [2023-09-01 02:59:51,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 588 transitions. [2023-09-01 02:59:51,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:59:51,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 588 transitions. [2023-09-01 02:59:51,812 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) [2023-09-01 02:59:51,814 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) [2023-09-01 02:59:51,815 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) [2023-09-01 02:59:51,815 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 219 flow. Second operand 3 states and 588 transitions. [2023-09-01 02:59:51,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 57 transitions, 323 flow [2023-09-01 02:59:51,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 57 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:59:51,817 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 216 flow [2023-09-01 02:59:51,817 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} [2023-09-01 02:59:51,818 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -1 predicate places. [2023-09-01 02:59:51,818 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 216 flow [2023-09-01 02:59:51,818 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) [2023-09-01 02:59:51,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:59:51,819 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 02:59:51,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 02:59:52,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:59:52,028 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 02:59:52,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:59:52,029 INFO L85 PathProgramCache]: Analyzing trace with hash 222007698, now seen corresponding path program 2 times [2023-09-01 02:59:52,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:59:52,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218431015] [2023-09-01 02:59:52,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:59:52,029 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:59:52,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:59:52,030 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:59:52,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 02:59:52,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:59:52,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:59:52,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 02:59:52,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:59:52,199 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:59:52,199 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 [2023-09-01 02:59:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:52,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:59:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:52,787 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:59:52,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218431015] [2023-09-01 02:59:52,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218431015] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:59:52,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:59:52,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:59:52,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359219196] [2023-09-01 02:59:52,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:59:52,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:59:52,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:59:52,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:59:52,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:59:55,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 456 [2023-09-01 02:59:55,712 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) [2023-09-01 02:59:55,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:59:55,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 456 [2023-09-01 02:59:55,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:59:57,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:59:59,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:00:01,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:00:04,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:00:13,340 INFO L130 PetriNetUnfolder]: 30876/39910 cut-off events. [2023-09-01 03:00:13,340 INFO L131 PetriNetUnfolder]: For 133/133 co-relation queries the response was YES. [2023-09-01 03:00:13,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80071 conditions, 39910 events. 30876/39910 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 1918. Compared 223637 event pairs, 15343 based on Foata normal form. 12/12363 useless extension candidates. Maximal degree in co-relation 80054. Up to 3962 conditions per place. [2023-09-01 03:00:13,524 INFO L137 encePairwiseOnDemand]: 449/456 looper letters, 345 selfloop transitions, 32 changer transitions 0/380 dead transitions. [2023-09-01 03:00:13,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 380 transitions, 1774 flow [2023-09-01 03:00:13,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 03:00:13,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 03:00:13,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2429 transitions. [2023-09-01 03:00:13,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44389619883040937 [2023-09-01 03:00:13,531 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2429 transitions. [2023-09-01 03:00:13,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2429 transitions. [2023-09-01 03:00:13,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:00:13,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2429 transitions. [2023-09-01 03:00:13,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 202.41666666666666) internal successors, (2429), 12 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:00:13,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 456.0) internal successors, (5928), 13 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:00:13,545 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 456.0) internal successors, (5928), 13 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:00:13,545 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 216 flow. Second operand 12 states and 2429 transitions. [2023-09-01 03:00:13,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 380 transitions, 1774 flow [2023-09-01 03:00:13,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 380 transitions, 1773 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:00:13,551 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 459 flow [2023-09-01 03:00:13,551 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=12, PETRI_FLOW=459, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2023-09-01 03:00:13,551 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 16 predicate places. [2023-09-01 03:00:13,552 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 459 flow [2023-09-01 03:00:13,552 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) [2023-09-01 03:00:13,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:00:13,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 03:00:13,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 03:00:13,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:00:13,763 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:00:13,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:00:13,763 INFO L85 PathProgramCache]: Analyzing trace with hash 253357572, now seen corresponding path program 1 times [2023-09-01 03:00:13,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:00:13,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275884708] [2023-09-01 03:00:13,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:00:13,764 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:00:13,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:00:13,765 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:00:13,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 03:00:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:00:13,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:00:13,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:00:13,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:00:13,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:00:13,892 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:00:13,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275884708] [2023-09-01 03:00:13,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275884708] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:00:13,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:00:13,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:00:13,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111716809] [2023-09-01 03:00:13,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:00:13,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:00:13,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:00:13,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:00:13,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:00:13,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 456 [2023-09-01 03:00:13,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 459 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) [2023-09-01 03:00:13,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:00:13,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 456 [2023-09-01 03:00:13,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:00:17,446 INFO L130 PetriNetUnfolder]: 30944/40180 cut-off events. [2023-09-01 03:00:17,446 INFO L131 PetriNetUnfolder]: For 189/189 co-relation queries the response was YES. [2023-09-01 03:00:17,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80768 conditions, 40180 events. 30944/40180 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 1780. Compared 226405 event pairs, 15370 based on Foata normal form. 240/12819 useless extension candidates. Maximal degree in co-relation 80743. Up to 39396 conditions per place. [2023-09-01 03:00:17,702 INFO L137 encePairwiseOnDemand]: 442/456 looper letters, 97 selfloop transitions, 3 changer transitions 1/104 dead transitions. [2023-09-01 03:00:17,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 104 transitions, 841 flow [2023-09-01 03:00:17,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:00:17,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:00:17,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 784 transitions. [2023-09-01 03:00:17,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298245614035088 [2023-09-01 03:00:17,705 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 784 transitions. [2023-09-01 03:00:17,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 784 transitions. [2023-09-01 03:00:17,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:00:17,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 784 transitions. [2023-09-01 03:00:17,707 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) [2023-09-01 03:00:17,709 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) [2023-09-01 03:00:17,710 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) [2023-09-01 03:00:17,710 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 459 flow. Second operand 4 states and 784 transitions. [2023-09-01 03:00:17,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 104 transitions, 841 flow [2023-09-01 03:00:17,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 104 transitions, 758 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-09-01 03:00:17,714 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 429 flow [2023-09-01 03:00:17,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=71, 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=429, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2023-09-01 03:00:17,715 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 16 predicate places. [2023-09-01 03:00:17,715 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 429 flow [2023-09-01 03:00:17,716 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) [2023-09-01 03:00:17,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:00:17,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:00:17,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-09-01 03:00:17,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:00:17,927 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:00:17,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:00:17,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1676343893, now seen corresponding path program 1 times [2023-09-01 03:00:17,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:00:17,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228639797] [2023-09-01 03:00:17,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:00:17,928 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:00:17,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:00:17,929 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:00:17,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 03:00:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:00:18,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 03:00:18,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:00:18,139 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:00:18,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:00:18,215 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:00:18,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:00:18,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:00:18,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 03:00:18,339 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 03:00:18,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 03:00:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:00:18,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:00:19,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:00:19,595 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:00:19,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228639797] [2023-09-01 03:00:19,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228639797] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:00:19,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:00:19,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:00:19,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260588468] [2023-09-01 03:00:19,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:00:19,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:00:19,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:00:19,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:00:19,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:00:21,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:00:25,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:00:29,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:00:30,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 456 [2023-09-01 03:00:30,446 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 429 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) [2023-09-01 03:00:30,446 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:00:30,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 456 [2023-09-01 03:00:30,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:00:36,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:00:52,112 WARN L222 SmtUtils]: Spent 6.13s 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) [2023-09-01 03:01:06,055 INFO L130 PetriNetUnfolder]: 69406/90526 cut-off events. [2023-09-01 03:01:06,055 INFO L131 PetriNetUnfolder]: For 9490/9490 co-relation queries the response was YES. [2023-09-01 03:01:06,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231660 conditions, 90526 events. 69406/90526 cut-off events. For 9490/9490 co-relation queries the response was YES. Maximal size of possible extension queue 3684. Compared 564040 event pairs, 34660 based on Foata normal form. 0/30675 useless extension candidates. Maximal degree in co-relation 231633. Up to 49921 conditions per place. [2023-09-01 03:01:06,697 INFO L137 encePairwiseOnDemand]: 446/456 looper letters, 181 selfloop transitions, 29 changer transitions 1/214 dead transitions. [2023-09-01 03:01:06,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 214 transitions, 1406 flow [2023-09-01 03:01:06,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 03:01:06,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 03:01:06,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2556 transitions. [2023-09-01 03:01:06,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736842105263158 [2023-09-01 03:01:06,705 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2556 transitions. [2023-09-01 03:01:06,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2556 transitions. [2023-09-01 03:01:06,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:01:06,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2556 transitions. [2023-09-01 03:01:06,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 170.4) internal successors, (2556), 15 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:06,718 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) [2023-09-01 03:01:06,720 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) [2023-09-01 03:01:06,720 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 429 flow. Second operand 15 states and 2556 transitions. [2023-09-01 03:01:06,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 214 transitions, 1406 flow [2023-09-01 03:01:06,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 214 transitions, 1400 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 03:01:06,735 INFO L231 Difference]: Finished difference. Result has 93 places, 92 transitions, 660 flow [2023-09-01 03:01:06,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=660, PETRI_PLACES=93, PETRI_TRANSITIONS=92} [2023-09-01 03:01:06,736 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 34 predicate places. [2023-09-01 03:01:06,736 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 92 transitions, 660 flow [2023-09-01 03:01:06,737 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) [2023-09-01 03:01:06,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:01:06,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:01:06,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 03:01:06,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:01:06,943 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:01:06,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:01:06,945 INFO L85 PathProgramCache]: Analyzing trace with hash -735629242, now seen corresponding path program 1 times [2023-09-01 03:01:06,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:01:06,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886669281] [2023-09-01 03:01:06,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:01:06,946 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:01:06,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:01:06,947 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:01:06,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 03:01:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:01:07,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 03:01:07,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:01:07,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:01:07,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:01:07,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:01:07,140 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 03:01:07,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-09-01 03:01:07,153 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 [2023-09-01 03:01:07,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:01:07,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 03:01:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:01:07,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:01:07,316 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:01:07,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886669281] [2023-09-01 03:01:07,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886669281] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:01:07,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:01:07,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:01:07,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713406078] [2023-09-01 03:01:07,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:01:07,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:01:07,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:01:07,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:01:07,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:01:07,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 456 [2023-09-01 03:01:07,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 92 transitions, 660 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) [2023-09-01 03:01:07,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:01:07,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 456 [2023-09-01 03:01:07,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:01:17,985 INFO L130 PetriNetUnfolder]: 65616/85316 cut-off events. [2023-09-01 03:01:17,986 INFO L131 PetriNetUnfolder]: For 42301/42301 co-relation queries the response was YES. [2023-09-01 03:01:18,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235494 conditions, 85316 events. 65616/85316 cut-off events. For 42301/42301 co-relation queries the response was YES. Maximal size of possible extension queue 3610. Compared 526169 event pairs, 32610 based on Foata normal form. 0/32206 useless extension candidates. Maximal degree in co-relation 235461. Up to 84196 conditions per place. [2023-09-01 03:01:18,620 INFO L137 encePairwiseOnDemand]: 453/456 looper letters, 86 selfloop transitions, 1 changer transitions 0/90 dead transitions. [2023-09-01 03:01:18,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 90 transitions, 830 flow [2023-09-01 03:01:18,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:01:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:01:18,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 580 transitions. [2023-09-01 03:01:18,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4239766081871345 [2023-09-01 03:01:18,623 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 580 transitions. [2023-09-01 03:01:18,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 580 transitions. [2023-09-01 03:01:18,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:01:18,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 580 transitions. [2023-09-01 03:01:18,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:18,626 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) [2023-09-01 03:01:18,627 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) [2023-09-01 03:01:18,627 INFO L175 Difference]: Start difference. First operand has 93 places, 92 transitions, 660 flow. Second operand 3 states and 580 transitions. [2023-09-01 03:01:18,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 90 transitions, 830 flow [2023-09-01 03:01:18,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 90 transitions, 811 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-09-01 03:01:18,732 INFO L231 Difference]: Finished difference. Result has 92 places, 90 transitions, 639 flow [2023-09-01 03:01:18,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=639, PETRI_PLACES=92, PETRI_TRANSITIONS=90} [2023-09-01 03:01:18,733 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 33 predicate places. [2023-09-01 03:01:18,733 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 90 transitions, 639 flow [2023-09-01 03:01:18,733 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) [2023-09-01 03:01:18,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:01:18,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:01:18,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 03:01:18,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:01:18,934 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:01:18,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:01:18,935 INFO L85 PathProgramCache]: Analyzing trace with hash -735629243, now seen corresponding path program 1 times [2023-09-01 03:01:18,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:01:18,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743598993] [2023-09-01 03:01:18,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:01:18,935 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:01:18,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:01:18,937 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:01:18,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 03:01:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:01:19,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 03:01:19,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:01:19,099 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-09-01 03:01:19,100 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 [2023-09-01 03:01:19,136 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 03:01:19,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 03:01:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:01:19,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:01:19,162 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:01:19,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743598993] [2023-09-01 03:01:19,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743598993] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:01:19,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:01:19,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:01:19,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677394736] [2023-09-01 03:01:19,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:01:19,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:01:19,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:01:19,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:01:19,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:01:19,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 456 [2023-09-01 03:01:19,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 90 transitions, 639 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) [2023-09-01 03:01:19,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:01:19,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 456 [2023-09-01 03:01:19,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:01:28,531 INFO L130 PetriNetUnfolder]: 61596/79876 cut-off events. [2023-09-01 03:01:28,531 INFO L131 PetriNetUnfolder]: For 39610/39610 co-relation queries the response was YES. [2023-09-01 03:01:28,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219647 conditions, 79876 events. 61596/79876 cut-off events. For 39610/39610 co-relation queries the response was YES. Maximal size of possible extension queue 3457. Compared 486328 event pairs, 30500 based on Foata normal form. 0/31096 useless extension candidates. Maximal degree in co-relation 219613. Up to 78756 conditions per place. [2023-09-01 03:01:29,205 INFO L137 encePairwiseOnDemand]: 453/456 looper letters, 84 selfloop transitions, 1 changer transitions 0/88 dead transitions. [2023-09-01 03:01:29,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 88 transitions, 805 flow [2023-09-01 03:01:29,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:01:29,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:01:29,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 575 transitions. [2023-09-01 03:01:29,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4203216374269006 [2023-09-01 03:01:29,207 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 575 transitions. [2023-09-01 03:01:29,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 575 transitions. [2023-09-01 03:01:29,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:01:29,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 575 transitions. [2023-09-01 03:01:29,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:29,210 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) [2023-09-01 03:01:29,211 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) [2023-09-01 03:01:29,211 INFO L175 Difference]: Start difference. First operand has 92 places, 90 transitions, 639 flow. Second operand 3 states and 575 transitions. [2023-09-01 03:01:29,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 88 transitions, 805 flow [2023-09-01 03:01:29,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 88 transitions, 804 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:01:29,465 INFO L231 Difference]: Finished difference. Result has 91 places, 88 transitions, 636 flow [2023-09-01 03:01:29,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=636, PETRI_PLACES=91, PETRI_TRANSITIONS=88} [2023-09-01 03:01:29,466 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 32 predicate places. [2023-09-01 03:01:29,466 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 88 transitions, 636 flow [2023-09-01 03:01:29,467 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) [2023-09-01 03:01:29,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:01:29,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:01:29,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-09-01 03:01:29,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:01:29,677 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:01:29,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:01:29,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1676343959, now seen corresponding path program 1 times [2023-09-01 03:01:29,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:01:29,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827224983] [2023-09-01 03:01:29,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:01:29,678 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:01:29,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:01:29,678 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:01:29,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 03:01:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:01:29,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:01:29,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:01:29,844 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:01:29,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:01:29,879 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 03:01:29,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 03:01:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:01:29,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:01:29,903 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:01:29,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827224983] [2023-09-01 03:01:29,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827224983] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:01:29,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:01:29,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:01:29,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366562530] [2023-09-01 03:01:29,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:01:29,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:01:29,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:01:29,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:01:29,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:01:30,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 456 [2023-09-01 03:01:30,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 88 transitions, 636 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) [2023-09-01 03:01:30,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:01:30,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 456 [2023-09-01 03:01:30,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:01:35,688 INFO L130 PetriNetUnfolder]: 34896/46156 cut-off events. [2023-09-01 03:01:35,689 INFO L131 PetriNetUnfolder]: For 32670/32670 co-relation queries the response was YES. [2023-09-01 03:01:35,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128878 conditions, 46156 events. 34896/46156 cut-off events. For 32670/32670 co-relation queries the response was YES. Maximal size of possible extension queue 2049. Compared 277529 event pairs, 17510 based on Foata normal form. 0/22146 useless extension candidates. Maximal degree in co-relation 128843. Up to 45513 conditions per place. [2023-09-01 03:01:36,035 INFO L137 encePairwiseOnDemand]: 451/456 looper letters, 70 selfloop transitions, 12 changer transitions 0/85 dead transitions. [2023-09-01 03:01:36,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 85 transitions, 788 flow [2023-09-01 03:01:36,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:01:36,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:01:36,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 740 transitions. [2023-09-01 03:01:36,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057017543859649 [2023-09-01 03:01:36,038 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 740 transitions. [2023-09-01 03:01:36,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 740 transitions. [2023-09-01 03:01:36,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:01:36,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 740 transitions. [2023-09-01 03:01:36,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:36,041 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) [2023-09-01 03:01:36,042 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) [2023-09-01 03:01:36,042 INFO L175 Difference]: Start difference. First operand has 91 places, 88 transitions, 636 flow. Second operand 4 states and 740 transitions. [2023-09-01 03:01:36,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 85 transitions, 788 flow [2023-09-01 03:01:36,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 85 transitions, 787 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:01:36,097 INFO L231 Difference]: Finished difference. Result has 90 places, 85 transitions, 647 flow [2023-09-01 03:01:36,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=647, PETRI_PLACES=90, PETRI_TRANSITIONS=85} [2023-09-01 03:01:36,098 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 31 predicate places. [2023-09-01 03:01:36,098 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 85 transitions, 647 flow [2023-09-01 03:01:36,098 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) [2023-09-01 03:01:36,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:01:36,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:01:36,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-09-01 03:01:36,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:01:36,309 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:01:36,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:01:36,310 INFO L85 PathProgramCache]: Analyzing trace with hash -346912066, now seen corresponding path program 1 times [2023-09-01 03:01:36,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:01:36,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94233640] [2023-09-01 03:01:36,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:01:36,310 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:01:36,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:01:36,311 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:01:36,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 03:01:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:01:36,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 2 conjunts are in the unsatisfiable core [2023-09-01 03:01:36,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:01:36,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:01:36,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:01:36,436 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:01:36,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94233640] [2023-09-01 03:01:36,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94233640] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:01:36,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:01:36,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:01:36,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246852336] [2023-09-01 03:01:36,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:01:36,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:01:36,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:01:36,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:01:36,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:01:36,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 456 [2023-09-01 03:01:36,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 85 transitions, 647 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) [2023-09-01 03:01:36,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:01:36,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 456 [2023-09-01 03:01:36,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:01:41,099 INFO L130 PetriNetUnfolder]: 28396/38096 cut-off events. [2023-09-01 03:01:41,099 INFO L131 PetriNetUnfolder]: For 20063/20063 co-relation queries the response was YES. [2023-09-01 03:01:41,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102790 conditions, 38096 events. 28396/38096 cut-off events. For 20063/20063 co-relation queries the response was YES. Maximal size of possible extension queue 1733. Compared 229688 event pairs, 3920 based on Foata normal form. 800/19356 useless extension candidates. Maximal degree in co-relation 102754. Up to 36321 conditions per place. [2023-09-01 03:01:41,615 INFO L137 encePairwiseOnDemand]: 449/456 looper letters, 92 selfloop transitions, 3 changer transitions 0/98 dead transitions. [2023-09-01 03:01:41,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 98 transitions, 885 flow [2023-09-01 03:01:41,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:01:41,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:01:41,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2023-09-01 03:01:41,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4422514619883041 [2023-09-01 03:01:41,617 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2023-09-01 03:01:41,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2023-09-01 03:01:41,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:01:41,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2023-09-01 03:01:41,619 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) [2023-09-01 03:01:41,621 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) [2023-09-01 03:01:41,621 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) [2023-09-01 03:01:41,621 INFO L175 Difference]: Start difference. First operand has 90 places, 85 transitions, 647 flow. Second operand 3 states and 605 transitions. [2023-09-01 03:01:41,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 98 transitions, 885 flow [2023-09-01 03:01:41,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 98 transitions, 872 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:01:41,666 INFO L231 Difference]: Finished difference. Result has 91 places, 87 transitions, 663 flow [2023-09-01 03:01:41,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=663, PETRI_PLACES=91, PETRI_TRANSITIONS=87} [2023-09-01 03:01:41,667 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 32 predicate places. [2023-09-01 03:01:41,667 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 87 transitions, 663 flow [2023-09-01 03:01:41,667 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) [2023-09-01 03:01:41,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:01:41,667 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-09-01 03:01:41,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-09-01 03:01:41,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:01:41,877 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:01:41,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:01:41,877 INFO L85 PathProgramCache]: Analyzing trace with hash 16129923, now seen corresponding path program 1 times [2023-09-01 03:01:41,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:01:41,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670486657] [2023-09-01 03:01:41,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:01:41,878 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:01:41,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:01:41,880 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:01:41,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 03:01:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:01:42,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 03:01:42,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:01:42,210 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:01:42,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:01:42,348 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:01:42,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:01:42,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:01:42,627 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 19 treesize of output 19 [2023-09-01 03:01:42,646 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 03:01:42,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 03:01:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:01:42,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:01:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:01:47,157 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:01:47,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670486657] [2023-09-01 03:01:47,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670486657] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:01:47,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:01:47,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-09-01 03:01:47,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142483727] [2023-09-01 03:01:47,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:01:47,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 03:01:47,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:01:47,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 03:01:47,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-09-01 03:01:50,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:01:57,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:02:19,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:02:38,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 456 [2023-09-01 03:02:38,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 87 transitions, 663 flow. Second operand has 14 states, 14 states have (on average 160.28571428571428) internal successors, (2244), 14 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:38,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:02:38,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 456 [2023-09-01 03:02:38,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:02:43,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:02:45,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:02:47,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:02:49,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:02:54,965 WARN L222 SmtUtils]: Spent 5.43s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:03:02,166 WARN L222 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:03:04,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:03:07,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:03:09,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:03:17,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:03:19,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:03:21,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:03:25,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:03:27,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:03:29,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:03:35,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:03:37,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:03:44,471 WARN L222 SmtUtils]: Spent 6.22s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:03:48,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:03:53,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:04:00,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:04:19,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:04:23,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:04:24,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:04:36,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:04:42,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:04:44,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:04:46,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:04:49,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:04:54,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:04:58,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:05:02,549 INFO L130 PetriNetUnfolder]: 39238/53940 cut-off events. [2023-09-01 03:05:02,550 INFO L131 PetriNetUnfolder]: For 78636/78636 co-relation queries the response was YES. [2023-09-01 03:05:02,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162260 conditions, 53940 events. 39238/53940 cut-off events. For 78636/78636 co-relation queries the response was YES. Maximal size of possible extension queue 1851. Compared 346837 event pairs, 17811 based on Foata normal form. 2920/29564 useless extension candidates. Maximal degree in co-relation 162223. Up to 23579 conditions per place. [2023-09-01 03:05:03,117 INFO L137 encePairwiseOnDemand]: 446/456 looper letters, 271 selfloop transitions, 34 changer transitions 1/309 dead transitions. [2023-09-01 03:05:03,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 309 transitions, 2236 flow [2023-09-01 03:05:03,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 03:05:03,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 03:05:03,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3749 transitions. [2023-09-01 03:05:03,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37370414673046254 [2023-09-01 03:05:03,125 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3749 transitions. [2023-09-01 03:05:03,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3749 transitions. [2023-09-01 03:05:03,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:05:03,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3749 transitions. [2023-09-01 03:05:03,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 170.4090909090909) internal successors, (3749), 22 states have internal predecessors, (3749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:03,139 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) [2023-09-01 03:05:03,140 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) [2023-09-01 03:05:03,140 INFO L175 Difference]: Start difference. First operand has 91 places, 87 transitions, 663 flow. Second operand 22 states and 3749 transitions. [2023-09-01 03:05:03,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 309 transitions, 2236 flow [2023-09-01 03:05:03,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 309 transitions, 2219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:05:03,218 INFO L231 Difference]: Finished difference. Result has 114 places, 93 transitions, 854 flow [2023-09-01 03:05:03,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=854, PETRI_PLACES=114, PETRI_TRANSITIONS=93} [2023-09-01 03:05:03,219 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 55 predicate places. [2023-09-01 03:05:03,219 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 93 transitions, 854 flow [2023-09-01 03:05:03,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 160.28571428571428) internal successors, (2244), 14 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:03,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:05:03,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:05:03,230 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 [2023-09-01 03:05:03,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:05:03,429 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:05:03,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:05:03,429 INFO L85 PathProgramCache]: Analyzing trace with hash 2088057717, now seen corresponding path program 1 times [2023-09-01 03:05:03,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:05:03,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1375283373] [2023-09-01 03:05:03,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:05:03,430 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:05:03,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:05:03,431 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:05:03,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 03:05:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:05:03,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 03:05:03,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:05:03,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:05:03,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:05:03,551 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:05:03,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1375283373] [2023-09-01 03:05:03,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1375283373] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:05:03,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:05:03,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:05:03,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859128064] [2023-09-01 03:05:03,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:05:03,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:05:03,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:05:03,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:05:03,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:05:03,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 456 [2023-09-01 03:05:03,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 93 transitions, 854 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) [2023-09-01 03:05:03,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:05:03,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 456 [2023-09-01 03:05:03,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:05:10,859 INFO L130 PetriNetUnfolder]: 36144/51375 cut-off events. [2023-09-01 03:05:10,860 INFO L131 PetriNetUnfolder]: For 65332/65332 co-relation queries the response was YES. [2023-09-01 03:05:11,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157384 conditions, 51375 events. 36144/51375 cut-off events. For 65332/65332 co-relation queries the response was YES. Maximal size of possible extension queue 1757. Compared 338484 event pairs, 7534 based on Foata normal form. 1137/27601 useless extension candidates. Maximal degree in co-relation 157343. Up to 42699 conditions per place. [2023-09-01 03:05:11,460 INFO L137 encePairwiseOnDemand]: 449/456 looper letters, 101 selfloop transitions, 3 changer transitions 1/108 dead transitions. [2023-09-01 03:05:11,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 108 transitions, 1160 flow [2023-09-01 03:05:11,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:05:11,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:05:11,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 607 transitions. [2023-09-01 03:05:11,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44371345029239767 [2023-09-01 03:05:11,463 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 607 transitions. [2023-09-01 03:05:11,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 607 transitions. [2023-09-01 03:05:11,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:05:11,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 607 transitions. [2023-09-01 03:05:11,464 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) [2023-09-01 03:05:11,467 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) [2023-09-01 03:05:11,467 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) [2023-09-01 03:05:11,467 INFO L175 Difference]: Start difference. First operand has 114 places, 93 transitions, 854 flow. Second operand 3 states and 607 transitions. [2023-09-01 03:05:11,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 108 transitions, 1160 flow [2023-09-01 03:05:11,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 108 transitions, 1094 flow, removed 20 selfloop flow, removed 7 redundant places. [2023-09-01 03:05:11,554 INFO L231 Difference]: Finished difference. Result has 110 places, 94 transitions, 809 flow [2023-09-01 03:05:11,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=809, PETRI_PLACES=110, PETRI_TRANSITIONS=94} [2023-09-01 03:05:11,555 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 51 predicate places. [2023-09-01 03:05:11,555 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 94 transitions, 809 flow [2023-09-01 03:05:11,555 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) [2023-09-01 03:05:11,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:05:11,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:05:11,564 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 (17)] Ended with exit code 0 [2023-09-01 03:05:11,756 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 [2023-09-01 03:05:11,757 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:05:11,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:05:11,758 INFO L85 PathProgramCache]: Analyzing trace with hash -610344647, now seen corresponding path program 1 times [2023-09-01 03:05:11,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:05:11,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119066039] [2023-09-01 03:05:11,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:05:11,758 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:05:11,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:05:11,759 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) [2023-09-01 03:05:11,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 03:05:11,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:05:11,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:05:11,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:05:11,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:05:11,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:05:11,960 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:05:11,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119066039] [2023-09-01 03:05:11,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119066039] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:05:11,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:05:11,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:05:11,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729773527] [2023-09-01 03:05:11,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:05:11,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:05:11,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:05:11,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:05:11,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:05:12,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 456 [2023-09-01 03:05:12,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 94 transitions, 809 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) [2023-09-01 03:05:12,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:05:12,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 456 [2023-09-01 03:05:12,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:05:19,539 INFO L130 PetriNetUnfolder]: 32296/46087 cut-off events. [2023-09-01 03:05:19,539 INFO L131 PetriNetUnfolder]: For 55445/55445 co-relation queries the response was YES. [2023-09-01 03:05:19,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161052 conditions, 46087 events. 32296/46087 cut-off events. For 55445/55445 co-relation queries the response was YES. Maximal size of possible extension queue 1698. Compared 302604 event pairs, 14510 based on Foata normal form. 68/24126 useless extension candidates. Maximal degree in co-relation 161010. Up to 44810 conditions per place. [2023-09-01 03:05:20,001 INFO L137 encePairwiseOnDemand]: 448/456 looper letters, 87 selfloop transitions, 20 changer transitions 2/112 dead transitions. [2023-09-01 03:05:20,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 112 transitions, 1144 flow [2023-09-01 03:05:20,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:05:20,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:05:20,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 948 transitions. [2023-09-01 03:05:20,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41578947368421054 [2023-09-01 03:05:20,004 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 948 transitions. [2023-09-01 03:05:20,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 948 transitions. [2023-09-01 03:05:20,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:05:20,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 948 transitions. [2023-09-01 03:05:20,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 189.6) internal successors, (948), 5 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:20,007 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) [2023-09-01 03:05:20,007 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) [2023-09-01 03:05:20,007 INFO L175 Difference]: Start difference. First operand has 110 places, 94 transitions, 809 flow. Second operand 5 states and 948 transitions. [2023-09-01 03:05:20,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 112 transitions, 1144 flow [2023-09-01 03:05:20,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 112 transitions, 1139 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 03:05:20,108 INFO L231 Difference]: Finished difference. Result has 115 places, 94 transitions, 880 flow [2023-09-01 03:05:20,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=880, PETRI_PLACES=115, PETRI_TRANSITIONS=94} [2023-09-01 03:05:20,109 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 56 predicate places. [2023-09-01 03:05:20,109 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 94 transitions, 880 flow [2023-09-01 03:05:20,110 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) [2023-09-01 03:05:20,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:05:20,110 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 03:05:20,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 03:05:20,321 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 [2023-09-01 03:05:20,321 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:05:20,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:05:20,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1741338574, now seen corresponding path program 3 times [2023-09-01 03:05:20,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:05:20,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183940413] [2023-09-01 03:05:20,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:05:20,322 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:05:20,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:05:20,323 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) [2023-09-01 03:05:20,324 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 [2023-09-01 03:05:20,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 03:05:20,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:05:20,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 03:05:20,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:05:20,595 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:05:20,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:05:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:05:21,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:05:24,383 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:05:24,383 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:05:24,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183940413] [2023-09-01 03:05:24,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183940413] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:05:24,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:05:24,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 03:05:24,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824902544] [2023-09-01 03:05:24,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:05:24,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 03:05:24,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:05:24,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 03:05:24,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 03:05:48,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 456 [2023-09-01 03:05:48,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 94 transitions, 880 flow. Second operand has 24 states, 24 states have (on average 171.0) internal successors, (4104), 24 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) [2023-09-01 03:05:48,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:05:48,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 456 [2023-09-01 03:05:48,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:06:00,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:06:02,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:06:04,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:06:06,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:06:08,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:06:10,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:06:12,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:06:14,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:06:15,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:06:17,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:06:39,012 INFO L130 PetriNetUnfolder]: 42856/61027 cut-off events. [2023-09-01 03:06:39,012 INFO L131 PetriNetUnfolder]: For 90763/90763 co-relation queries the response was YES. [2023-09-01 03:06:39,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219396 conditions, 61027 events. 42856/61027 cut-off events. For 90763/90763 co-relation queries the response was YES. Maximal size of possible extension queue 2016. Compared 406821 event pairs, 19238 based on Foata normal form. 30/34797 useless extension candidates. Maximal degree in co-relation 219351. Up to 24289 conditions per place. [2023-09-01 03:06:39,685 INFO L137 encePairwiseOnDemand]: 449/456 looper letters, 422 selfloop transitions, 68 changer transitions 0/493 dead transitions. [2023-09-01 03:06:39,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 493 transitions, 4247 flow [2023-09-01 03:06:39,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 03:06:39,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 03:06:39,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4498 transitions. [2023-09-01 03:06:39,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4110014619883041 [2023-09-01 03:06:39,694 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4498 transitions. [2023-09-01 03:06:39,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4498 transitions. [2023-09-01 03:06:39,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:06:39,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4498 transitions. [2023-09-01 03:06:39,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 187.41666666666666) internal successors, (4498), 24 states have internal predecessors, (4498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:06:39,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 456.0) internal successors, (11400), 25 states have internal predecessors, (11400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:06:39,710 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 456.0) internal successors, (11400), 25 states have internal predecessors, (11400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:06:39,710 INFO L175 Difference]: Start difference. First operand has 115 places, 94 transitions, 880 flow. Second operand 24 states and 4498 transitions. [2023-09-01 03:06:39,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 493 transitions, 4247 flow [2023-09-01 03:06:39,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 493 transitions, 4063 flow, removed 47 selfloop flow, removed 5 redundant places. [2023-09-01 03:06:39,977 INFO L231 Difference]: Finished difference. Result has 146 places, 124 transitions, 1304 flow [2023-09-01 03:06:39,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1304, PETRI_PLACES=146, PETRI_TRANSITIONS=124} [2023-09-01 03:06:39,978 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 87 predicate places. [2023-09-01 03:06:39,978 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 124 transitions, 1304 flow [2023-09-01 03:06:39,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 171.0) internal successors, (4104), 24 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) [2023-09-01 03:06:39,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:06:39,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:06:39,987 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 (19)] Ended with exit code 0 [2023-09-01 03:06:40,179 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 [2023-09-01 03:06:40,180 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:06:40,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:06:40,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1549029583, now seen corresponding path program 1 times [2023-09-01 03:06:40,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:06:40,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331979321] [2023-09-01 03:06:40,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:06:40,181 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:06:40,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:06:40,182 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) [2023-09-01 03:06:40,185 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 [2023-09-01 03:06:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:06:40,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:06:40,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:06:40,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 03:06:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:06:40,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:06:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:06:41,721 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:06:41,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331979321] [2023-09-01 03:06:41,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331979321] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:06:41,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:06:41,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-09-01 03:06:41,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928736697] [2023-09-01 03:06:41,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:06:41,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:06:41,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:06:41,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:06:41,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:06:52,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 456 [2023-09-01 03:06:52,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 124 transitions, 1304 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) [2023-09-01 03:06:52,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:06:52,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 456 [2023-09-01 03:06:52,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:07:08,507 INFO L130 PetriNetUnfolder]: 39394/56311 cut-off events. [2023-09-01 03:07:08,507 INFO L131 PetriNetUnfolder]: For 74016/74016 co-relation queries the response was YES. [2023-09-01 03:07:09,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199398 conditions, 56311 events. 39394/56311 cut-off events. For 74016/74016 co-relation queries the response was YES. Maximal size of possible extension queue 1875. Compared 374985 event pairs, 17588 based on Foata normal form. 0/32901 useless extension candidates. Maximal degree in co-relation 199342. Up to 44803 conditions per place. [2023-09-01 03:07:09,313 INFO L137 encePairwiseOnDemand]: 447/456 looper letters, 142 selfloop transitions, 53 changer transitions 0/198 dead transitions. [2023-09-01 03:07:09,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 198 transitions, 2096 flow [2023-09-01 03:07:09,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 03:07:09,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 03:07:09,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1915 transitions. [2023-09-01 03:07:09,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817783094098884 [2023-09-01 03:07:09,318 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1915 transitions. [2023-09-01 03:07:09,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1915 transitions. [2023-09-01 03:07:09,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:07:09,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1915 transitions. [2023-09-01 03:07:09,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 174.0909090909091) internal successors, (1915), 11 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:07:09,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 456.0) internal successors, (5472), 12 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:07:09,325 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 456.0) internal successors, (5472), 12 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:07:09,325 INFO L175 Difference]: Start difference. First operand has 146 places, 124 transitions, 1304 flow. Second operand 11 states and 1915 transitions. [2023-09-01 03:07:09,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 198 transitions, 2096 flow [2023-09-01 03:07:09,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 198 transitions, 1936 flow, removed 35 selfloop flow, removed 10 redundant places. [2023-09-01 03:07:09,452 INFO L231 Difference]: Finished difference. Result has 148 places, 126 transitions, 1290 flow [2023-09-01 03:07:09,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1290, PETRI_PLACES=148, PETRI_TRANSITIONS=126} [2023-09-01 03:07:09,452 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 89 predicate places. [2023-09-01 03:07:09,453 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 126 transitions, 1290 flow [2023-09-01 03:07:09,453 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) [2023-09-01 03:07:09,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:07:09,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:07:09,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-09-01 03:07:09,654 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 [2023-09-01 03:07:09,654 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:07:09,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:07:09,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1549029582, now seen corresponding path program 1 times [2023-09-01 03:07:09,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:07:09,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51746471] [2023-09-01 03:07:09,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:07:09,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:07:09,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:07:09,657 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) [2023-09-01 03:07:09,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-09-01 03:07:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:07:09,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 03:07:09,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:07:09,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 03:07:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:07:09,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:07:09,859 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:07:09,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51746471] [2023-09-01 03:07:09,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51746471] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:07:09,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:07:09,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:07:09,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818856542] [2023-09-01 03:07:09,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:07:09,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:07:09,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:07:09,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:07:09,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:07:10,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 456 [2023-09-01 03:07:10,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 126 transitions, 1290 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) [2023-09-01 03:07:10,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:07:10,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 456 [2023-09-01 03:07:10,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:07:16,323 INFO L130 PetriNetUnfolder]: 26230/38335 cut-off events. [2023-09-01 03:07:16,324 INFO L131 PetriNetUnfolder]: For 91677/91677 co-relation queries the response was YES. [2023-09-01 03:07:16,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144764 conditions, 38335 events. 26230/38335 cut-off events. For 91677/91677 co-relation queries the response was YES. Maximal size of possible extension queue 1230. Compared 252069 event pairs, 11348 based on Foata normal form. 2394/30001 useless extension candidates. Maximal degree in co-relation 144705. Up to 37425 conditions per place. [2023-09-01 03:07:16,804 INFO L137 encePairwiseOnDemand]: 452/456 looper letters, 101 selfloop transitions, 20 changer transitions 0/124 dead transitions. [2023-09-01 03:07:16,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 124 transitions, 1520 flow [2023-09-01 03:07:16,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:07:16,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:07:16,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 737 transitions. [2023-09-01 03:07:16,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40405701754385964 [2023-09-01 03:07:16,807 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 737 transitions. [2023-09-01 03:07:16,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 737 transitions. [2023-09-01 03:07:16,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:07:16,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 737 transitions. [2023-09-01 03:07:16,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 184.25) internal successors, (737), 4 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:07:16,810 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) [2023-09-01 03:07:16,810 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) [2023-09-01 03:07:16,810 INFO L175 Difference]: Start difference. First operand has 148 places, 126 transitions, 1290 flow. Second operand 4 states and 737 transitions. [2023-09-01 03:07:16,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 124 transitions, 1520 flow [2023-09-01 03:07:17,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 124 transitions, 1328 flow, removed 28 selfloop flow, removed 8 redundant places. [2023-09-01 03:07:17,028 INFO L231 Difference]: Finished difference. Result has 141 places, 124 transitions, 1126 flow [2023-09-01 03:07:17,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1126, PETRI_PLACES=141, PETRI_TRANSITIONS=124} [2023-09-01 03:07:17,028 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 82 predicate places. [2023-09-01 03:07:17,028 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 124 transitions, 1126 flow [2023-09-01 03:07:17,028 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) [2023-09-01 03:07:17,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:07:17,029 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:07:17,038 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 [2023-09-01 03:07:17,229 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 [2023-09-01 03:07:17,230 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:07:17,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:07:17,230 INFO L85 PathProgramCache]: Analyzing trace with hash 357111481, now seen corresponding path program 2 times [2023-09-01 03:07:17,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:07:17,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [662956430] [2023-09-01 03:07:17,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:07:17,231 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:07:17,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:07:17,232 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) [2023-09-01 03:07:17,233 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 [2023-09-01 03:07:17,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 03:07:17,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:07:17,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 03:07:17,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:07:17,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 03:07:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 03:07:17,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:07:17,551 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:07:17,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [662956430] [2023-09-01 03:07:17,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [662956430] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:07:17,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:07:17,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:07:17,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332758223] [2023-09-01 03:07:17,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:07:17,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:07:17,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:07:17,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:07:17,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:07:17,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 456 [2023-09-01 03:07:17,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 124 transitions, 1126 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) [2023-09-01 03:07:17,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:07:17,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 456 [2023-09-01 03:07:17,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:07:22,041 INFO L130 PetriNetUnfolder]: 16428/24661 cut-off events. [2023-09-01 03:07:22,041 INFO L131 PetriNetUnfolder]: For 66429/66429 co-relation queries the response was YES. [2023-09-01 03:07:22,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86551 conditions, 24661 events. 16428/24661 cut-off events. For 66429/66429 co-relation queries the response was YES. Maximal size of possible extension queue 795. Compared 159480 event pairs, 6864 based on Foata normal form. 3762/20529 useless extension candidates. Maximal degree in co-relation 86494. Up to 23895 conditions per place. [2023-09-01 03:07:22,679 INFO L137 encePairwiseOnDemand]: 452/456 looper letters, 77 selfloop transitions, 42 changer transitions 0/122 dead transitions. [2023-09-01 03:07:22,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 122 transitions, 1344 flow [2023-09-01 03:07:22,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:07:22,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:07:22,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 735 transitions. [2023-09-01 03:07:22,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4029605263157895 [2023-09-01 03:07:22,681 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 735 transitions. [2023-09-01 03:07:22,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 735 transitions. [2023-09-01 03:07:22,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:07:22,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 735 transitions. [2023-09-01 03:07:22,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.75) internal successors, (735), 4 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:07:22,684 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) [2023-09-01 03:07:22,684 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) [2023-09-01 03:07:22,684 INFO L175 Difference]: Start difference. First operand has 141 places, 124 transitions, 1126 flow. Second operand 4 states and 735 transitions. [2023-09-01 03:07:22,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 122 transitions, 1344 flow [2023-09-01 03:07:22,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 122 transitions, 1311 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 03:07:22,747 INFO L231 Difference]: Finished difference. Result has 138 places, 122 transitions, 1157 flow [2023-09-01 03:07:22,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=1073, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1157, PETRI_PLACES=138, PETRI_TRANSITIONS=122} [2023-09-01 03:07:22,747 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 79 predicate places. [2023-09-01 03:07:22,748 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 122 transitions, 1157 flow [2023-09-01 03:07:22,748 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) [2023-09-01 03:07:22,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:07:22,748 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 1, 1, 1] [2023-09-01 03:07:22,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-09-01 03:07:22,948 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 [2023-09-01 03:07:22,949 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:07:22,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:07:22,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1951269739, now seen corresponding path program 1 times [2023-09-01 03:07:22,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:07:22,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586923731] [2023-09-01 03:07:22,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:07:22,950 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:07:22,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:07:22,951 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) [2023-09-01 03:07:22,952 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 (23)] Waiting until timeout for monitored process [2023-09-01 03:07:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:07:23,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 03:07:23,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:07:23,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 03:07:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:07:23,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:07:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:07:29,190 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:07:29,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586923731] [2023-09-01 03:07:29,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586923731] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:07:29,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:07:29,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2023-09-01 03:07:29,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859808397] [2023-09-01 03:07:29,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:07:29,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 03:07:29,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:07:29,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 03:07:29,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2023-09-01 03:08:13,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 456 [2023-09-01 03:08:13,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 122 transitions, 1157 flow. Second operand has 30 states, 30 states have (on average 169.03333333333333) internal successors, (5071), 30 states have internal predecessors, (5071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:08:13,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:08:13,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 456 [2023-09-01 03:08:13,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:08:26,653 WARN L222 SmtUtils]: Spent 8.64s on a formula simplification that was a NOOP. DAG size: 156 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:08:29,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:08:31,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:08:33,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:08:35,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:08:37,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:08:39,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:08:41,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:08:43,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:08:45,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:08:47,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:08:49,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:08:51,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:08:53,096 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 [] [2023-09-01 03:08:59,916 WARN L222 SmtUtils]: Spent 5.78s on a formula simplification that was a NOOP. DAG size: 145 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:09:49,498 INFO L130 PetriNetUnfolder]: 38538/57691 cut-off events. [2023-09-01 03:09:49,499 INFO L131 PetriNetUnfolder]: For 90270/90270 co-relation queries the response was YES. [2023-09-01 03:09:50,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202195 conditions, 57691 events. 38538/57691 cut-off events. For 90270/90270 co-relation queries the response was YES. Maximal size of possible extension queue 1131. Compared 396672 event pairs, 16074 based on Foata normal form. 90/39699 useless extension candidates. Maximal degree in co-relation 202141. Up to 22257 conditions per place. [2023-09-01 03:09:50,266 INFO L137 encePairwiseOnDemand]: 450/456 looper letters, 786 selfloop transitions, 80 changer transitions 0/869 dead transitions. [2023-09-01 03:09:50,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 869 transitions, 7342 flow [2023-09-01 03:09:50,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 03:09:50,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 03:09:50,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5736 transitions. [2023-09-01 03:09:50,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4192982456140351 [2023-09-01 03:09:50,273 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5736 transitions. [2023-09-01 03:09:50,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5736 transitions. [2023-09-01 03:09:50,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:09:50,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5736 transitions. [2023-09-01 03:09:50,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 191.2) internal successors, (5736), 30 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:50,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 456.0) internal successors, (14136), 31 states have internal predecessors, (14136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:50,286 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 456.0) internal successors, (14136), 31 states have internal predecessors, (14136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:50,286 INFO L175 Difference]: Start difference. First operand has 138 places, 122 transitions, 1157 flow. Second operand 30 states and 5736 transitions. [2023-09-01 03:09:50,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 869 transitions, 7342 flow [2023-09-01 03:09:50,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 869 transitions, 7211 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:09:50,464 INFO L231 Difference]: Finished difference. Result has 181 places, 143 transitions, 1657 flow [2023-09-01 03:09:50,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=1092, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1657, PETRI_PLACES=181, PETRI_TRANSITIONS=143} [2023-09-01 03:09:50,465 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 122 predicate places. [2023-09-01 03:09:50,465 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 143 transitions, 1657 flow [2023-09-01 03:09:50,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 169.03333333333333) internal successors, (5071), 30 states have internal predecessors, (5071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:50,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:09:50,466 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-09-01 03:09:50,478 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 [2023-09-01 03:09:50,671 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 [2023-09-01 03:09:50,671 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:09:50,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:09:50,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1962116708, now seen corresponding path program 2 times [2023-09-01 03:09:50,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:09:50,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437762124] [2023-09-01 03:09:50,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:09:50,672 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:09:50,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:09:50,674 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) [2023-09-01 03:09:50,675 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 [2023-09-01 03:09:50,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 03:09:50,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:09:50,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:09:50,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:09:50,977 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:09:50,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:09:51,115 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:09:51,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:09:51,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:09:51,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 03:09:51,353 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 03:09:51,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 03:09:51,403 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 03:09:51,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:09:51,404 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:09:51,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437762124] [2023-09-01 03:09:51,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437762124] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:09:51,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:09:51,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:09:51,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816557265] [2023-09-01 03:09:51,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:09:51,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:09:51,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:09:51,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:09:51,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:09:51,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 456 [2023-09-01 03:09:51,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 143 transitions, 1657 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) [2023-09-01 03:09:51,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:09:51,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 456 [2023-09-01 03:09:51,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:09:59,307 INFO L130 PetriNetUnfolder]: 30570/45975 cut-off events. [2023-09-01 03:09:59,307 INFO L131 PetriNetUnfolder]: For 79510/79510 co-relation queries the response was YES. [2023-09-01 03:09:59,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145617 conditions, 45975 events. 30570/45975 cut-off events. For 79510/79510 co-relation queries the response was YES. Maximal size of possible extension queue 891. Compared 308812 event pairs, 10714 based on Foata normal form. 1817/32785 useless extension candidates. Maximal degree in co-relation 145546. Up to 44675 conditions per place. [2023-09-01 03:10:00,094 INFO L137 encePairwiseOnDemand]: 451/456 looper letters, 112 selfloop transitions, 24 changer transitions 1/140 dead transitions. [2023-09-01 03:10:00,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 140 transitions, 1887 flow [2023-09-01 03:10:00,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:10:00,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:10:00,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 713 transitions. [2023-09-01 03:10:00,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39089912280701755 [2023-09-01 03:10:00,096 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 713 transitions. [2023-09-01 03:10:00,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 713 transitions. [2023-09-01 03:10:00,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:10:00,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 713 transitions. [2023-09-01 03:10:00,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.25) internal successors, (713), 4 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:00,098 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) [2023-09-01 03:10:00,098 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) [2023-09-01 03:10:00,098 INFO L175 Difference]: Start difference. First operand has 181 places, 143 transitions, 1657 flow. Second operand 4 states and 713 transitions. [2023-09-01 03:10:00,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 140 transitions, 1887 flow [2023-09-01 03:10:00,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 140 transitions, 1738 flow, removed 19 selfloop flow, removed 16 redundant places. [2023-09-01 03:10:00,246 INFO L231 Difference]: Finished difference. Result has 165 places, 139 transitions, 1502 flow [2023-09-01 03:10:00,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1502, PETRI_PLACES=165, PETRI_TRANSITIONS=139} [2023-09-01 03:10:00,247 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 106 predicate places. [2023-09-01 03:10:00,247 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 139 transitions, 1502 flow [2023-09-01 03:10:00,247 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) [2023-09-01 03:10:00,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:10:00,247 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1] [2023-09-01 03:10:00,263 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 [2023-09-01 03:10:00,458 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 [2023-09-01 03:10:00,459 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:10:00,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:10:00,459 INFO L85 PathProgramCache]: Analyzing trace with hash 410013042, now seen corresponding path program 4 times [2023-09-01 03:10:00,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:10:00,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453859224] [2023-09-01 03:10:00,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 03:10:00,460 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:10:00,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:10:00,461 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) [2023-09-01 03:10:00,461 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 [2023-09-01 03:10:00,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 03:10:00,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:10:00,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 03:10:00,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:10:00,798 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:10:00,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:10:02,305 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:10:02,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:10:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:10:13,887 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:10:13,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453859224] [2023-09-01 03:10:13,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453859224] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:10:13,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:10:13,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2023-09-01 03:10:13,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909319928] [2023-09-01 03:10:13,888 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:10:13,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-09-01 03:10:13,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:10:13,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-09-01 03:10:13,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2023-09-01 03:11:57,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 456 [2023-09-01 03:11:57,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 139 transitions, 1502 flow. Second operand has 48 states, 48 states have (on average 171.0) internal successors, (8208), 48 states have internal predecessors, (8208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:57,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:11:57,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 456 [2023-09-01 03:11:57,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:12:34,600 WARN L222 SmtUtils]: Spent 23.04s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:12:58,307 WARN L222 SmtUtils]: Spent 20.84s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:13:01,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:13:03,334 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 [] Killed by 15